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Edit File : class-wp-comment-query.php \| Size : 42.21 KB
<?php /** * Comment API: WP_Comment_Query class * * @package WordPress * @subpackage Comments * @since 4.4.0 / /* * Core class used for querying comments. * * @since 3.1.0 * * @see WP_Comment_Query::__construct() for accepted arguments. / class WP_Comment_Query { /* * SQL for database query. * * @since 4.0.1 * @var string / public $request; /* * Metadata query container * * @since 3.5.0 * @var object WP_Meta_Query / public $meta_query = false; /* * Metadata query clauses. * * @since 4.4.0 * @var array / protected $meta_query_clauses; /* * SQL query clauses. * * @since 4.4.0 * @var array / protected $sql_clauses = array( 'select' => '', 'from' => '', 'where' => array(), 'groupby' => '', 'orderby' => '', 'limits' => '', ); /* * SQL WHERE clause. * * Stored after the {@see 'comments_clauses'} filter is run on the compiled WHERE sub-clauses. * * @since 4.4.2 * @var string / protected $filtered_where_clause; /* * Date query container * * @since 3.7.0 * @var object WP_Date_Query / public $date_query = false; /* * Query vars set by the user. * * @since 3.1.0 * @var array / public $query_vars; /* * Default values for query vars. * * @since 4.2.0 * @var array / public $query_var_defaults; /* * List of comments located by the query. * * @since 4.0.0 * @var array / public $comments; /* * The amount of found comments for the current query. * * @since 4.4.0 * @var int / public $found_comments = 0; /* * The number of pages. * * @since 4.4.0 * @var int / public $max_num_pages = 0; /* * Make private/protected methods readable for backward compatibility. * * @since 4.0.0 * * @param string $name Method to call. * @param array $arguments Arguments to pass when calling. * @return mixed\|false Return value of the callback, false otherwise. / public function __call( $name, $arguments ) { if ( 'get_search_sql' === $name ) { return call_user_func_array( array( $this, $name ), $arguments ); } return false; } /* * Constructor. * * Sets up the comment query, based on the query vars passed. * * @since 4.2.0 * @since 4.4.0 `$parent__in` and `$parent__not_in` were added. * @since 4.4.0 Order by `comment__in` was added. `$update_comment_meta_cache`, `$no_found_rows`, * `$hierarchical`, and `$update_comment_post_cache` were added. * @since 4.5.0 Introduced the `$author_url` argument. * @since 4.6.0 Introduced the `$cache_domain` argument. * @since 4.9.0 Introduced the `$paged` argument. * * @param string\|array $query { * Optional. Array or query string of comment query parameters. Default empty. * * @type string $author_email Comment author email address. Default empty. * @type string $author_url Comment author URL. Default empty. * @type array $author__in Array of author IDs to include comments for. Default empty. * @type array $author__not_in Array of author IDs to exclude comments for. Default empty. * @type array $comment__in Array of comment IDs to include. Default empty. * @type array $comment__not_in Array of comment IDs to exclude. Default empty. * @type bool $count Whether to return a comment count (true) or array of * comment objects (false). Default false. * @type array $date_query Date query clauses to limit comments by. See WP_Date_Query. * Default null. * @type string $fields Comment fields to return. Accepts 'ids' for comment IDs * only or empty for all fields. Default empty. * @type int $ID Currently unused. * @type array $include_unapproved Array of IDs or email addresses of users whose unapproved * comments will be returned by the query regardless of * `$status`. Default empty. * @type int $karma Karma score to retrieve matching comments for. * Default empty. * @type string $meta_key Include comments with a matching comment meta key. * Default empty. * @type string $meta_value Include comments with a matching comment meta value. * Requires `$meta_key` to be set. Default empty. * @type array $meta_query Meta query clauses to limit retrieved comments by. * See WP_Meta_Query. Default empty. * @type int $number Maximum number of comments to retrieve. * Default empty (no limit). * @type int $paged When used with $number, defines the page of results to return. * When used with $offset, $offset takes precedence. Default 1. * @type int $offset Number of comments to offset the query. Used to build * LIMIT clause. Default 0. * @type bool $no_found_rows Whether to disable the `SQL_CALC_FOUND_ROWS` query. * Default: true. * @type string\|array $orderby Comment status or array of statuses. To use 'meta_value' * or 'meta_value_num', `$meta_key` must also be defined. * To sort by a specific `$meta_query` clause, use that * clause's array key. Accepts 'comment_agent', * 'comment_approved', 'comment_author', * 'comment_author_email', 'comment_author_IP', * 'comment_author_url', 'comment_content', 'comment_date', * 'comment_date_gmt', 'comment_ID', 'comment_karma', * 'comment_parent', 'comment_post_ID', 'comment_type', * 'user_id', 'comment__in', 'meta_value', 'meta_value_num', * the value of $meta_key, and the array keys of * `$meta_query`. Also accepts false, an empty array, or * 'none' to disable `ORDER BY` clause. * Default: 'comment_date_gmt'. * @type string $order How to order retrieved comments. Accepts 'ASC', 'DESC'. * Default: 'DESC'. * @type int $parent Parent ID of comment to retrieve children of. * Default empty. * @type array $parent__in Array of parent IDs of comments to retrieve children for. * Default empty. * @type array $parent__not_in Array of parent IDs of comments not to retrieve * children for. Default empty. * @type array $post_author__in Array of author IDs to retrieve comments for. * Default empty. * @type array $post_author__not_in Array of author IDs not to retrieve comments for. * Default empty. * @type int $post_ID Currently unused. * @type int $post_id Limit results to those affiliated with a given post ID. * Default 0. * @type array $post__in Array of post IDs to include affiliated comments for. * Default empty. * @type array $post__not_in Array of post IDs to exclude affiliated comments for. * Default empty. * @type int $post_author Post author ID to limit results by. Default empty. * @type string\|array $post_status Post status or array of post statuses to retrieve * affiliated comments for. Pass 'any' to match any value. * Default empty. * @type string $post_type Post type or array of post types to retrieve affiliated * comments for. Pass 'any' to match any value. Default empty. * @type string $post_name Post name to retrieve affiliated comments for. * Default empty. * @type int $post_parent Post parent ID to retrieve affiliated comments for. * Default empty. * @type string $search Search term(s) to retrieve matching comments for. * Default empty. * @type string\|array $status Comment stati to limit results by. Accepts an array * or space/comma-separated list of 'hold' (`comment_status=0`), * 'approve' (`comment_status=1`), 'all', or a custom * comment status. Default 'all'. * @type string\|array $type Include comments of a given type, or array of types. * Accepts 'comment', 'pings' (includes 'pingback' and * 'trackback'), or anycustom type string. Default empty. * @type array $type__in Include comments from a given array of comment types. * Default empty. * @type array $type__not_in Exclude comments from a given array of comment types. * Default empty. * @type int $user_id Include comments for a specific user ID. Default empty. * @type bool\|string $hierarchical Whether to include comment descendants in the results. * 'threaded' returns a tree, with each comment's children * stored in a `children` property on the `WP_Comment` * object. 'flat' returns a flat array of found comments plus * their children. Pass `false` to leave out descendants. * The parameter is ignored (forced to `false`) when * `$fields` is 'ids' or 'counts'. Accepts 'threaded', * 'flat', or false. Default: false. * @type string $cache_domain Unique cache key to be produced when this query is stored in * an object cache. Default is 'core'. * @type bool $update_comment_meta_cache Whether to prime the metadata cache for found comments. * Default true. * @type bool $update_comment_post_cache Whether to prime the cache for comment posts. * Default false. * } / public function __construct( $query = '' ) { $this->query_var_defaults = array( 'author_email' => '', 'author_url' => '', 'author__in' => '', 'author__not_in' => '', 'include_unapproved' => '', 'fields' => '', 'ID' => '', 'comment__in' => '', 'comment__not_in' => '', 'karma' => '', 'number' => '', 'offset' => '', 'no_found_rows' => true, 'orderby' => '', 'order' => 'DESC', 'paged' => 1, 'parent' => '', 'parent__in' => '', 'parent__not_in' => '', 'post_author__in' => '', 'post_author__not_in' => '', 'post_ID' => '', 'post_id' => 0, 'post__in' => '', 'post__not_in' => '', 'post_author' => '', 'post_name' => '', 'post_parent' => '', 'post_status' => '', 'post_type' => '', 'status' => 'all', 'type' => '', 'type__in' => '', 'type__not_in' => '', 'user_id' => '', 'search' => '', 'count' => false, 'meta_key' => '', 'meta_value' => '', 'meta_query' => '', 'date_query' => null, // See WP_Date_Query 'hierarchical' => false, 'cache_domain' => 'core', 'update_comment_meta_cache' => true, 'update_comment_post_cache' => false, ); if ( ! empty( $query ) ) { $this->query( $query ); } } /* * Parse arguments passed to the comment query with default query parameters. * * @since 4.2.0 Extracted from WP_Comment_Query::query(). * * @param string\|array $query WP_Comment_Query arguments. See WP_Comment_Query::__construct() / public function parse_query( $query = '' ) { if ( empty( $query ) ) { $query = $this->query_vars; } $this->query_vars = wp_parse_args( $query, $this->query_var_defaults ); /* * Fires after the comment query vars have been parsed. * * @since 4.2.0 * * @param WP_Comment_Query $this The WP_Comment_Query instance (passed by reference). / do_action_ref_array( 'parse_comment_query', array( &$this ) ); } /* * Sets up the WordPress query for retrieving comments. * * @since 3.1.0 * @since 4.1.0 Introduced 'comment__in', 'comment__not_in', 'post_author__in', * 'post_author__not_in', 'author__in', 'author__not_in', 'post__in', * 'post__not_in', 'include_unapproved', 'type__in', and 'type__not_in' * arguments to $query_vars. * @since 4.2.0 Moved parsing to WP_Comment_Query::parse_query(). * * @param string\|array $query Array or URL query string of parameters. * @return array\|int List of comments, or number of comments when 'count' is passed as a query var. / public function query( $query ) { $this->query_vars = wp_parse_args( $query ); return $this->get_comments(); } /* * Get a list of comments matching the query vars. * * @since 4.2.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @return int\|array List of comments or number of found comments if `$count` argument is true. / public function get_comments() { global $wpdb; $this->parse_query(); // Parse meta query $this->meta_query = new WP_Meta_Query(); $this->meta_query->parse_query_vars( $this->query_vars ); /* * Fires before comments are retrieved. * * @since 3.1.0 * * @param WP_Comment_Query $this Current instance of WP_Comment_Query (passed by reference). / do_action_ref_array( 'pre_get_comments', array( &$this ) ); // Reparse query vars, in case they were modified in a 'pre_get_comments' callback. $this->meta_query->parse_query_vars( $this->query_vars ); if ( ! empty( $this->meta_query->queries ) ) { $this->meta_query_clauses = $this->meta_query->get_sql( 'comment', $wpdb->comments, 'comment_ID', $this ); } / * Only use the args defined in the query_var_defaults to compute the key, * but ignore 'fields', which does not affect query results. / $_args = wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) ); unset( $_args['fields'] ); $key = md5( serialize( $_args ) ); $last_changed = wp_cache_get_last_changed( 'comment' ); $cache_key = "get_comments:$key:$last_changed"; $cache_value = wp_cache_get( $cache_key, 'comment' ); if ( false === $cache_value ) { $comment_ids = $this->get_comment_ids(); if ( $comment_ids ) { $this->set_found_comments(); } $cache_value = array( 'comment_ids' => $comment_ids, 'found_comments' => $this->found_comments, ); wp_cache_add( $cache_key, $cache_value, 'comment' ); } else { $comment_ids = $cache_value['comment_ids']; $this->found_comments = $cache_value['found_comments']; } if ( $this->found_comments && $this->query_vars['number'] ) { $this->max_num_pages = ceil( $this->found_comments / $this->query_vars['number'] ); } // If querying for a count only, there's nothing more to do. if ( $this->query_vars['count'] ) { // $comment_ids is actually a count in this case. return intval( $comment_ids ); } $comment_ids = array_map( 'intval', $comment_ids ); if ( 'ids' == $this->query_vars['fields'] ) { $this->comments = $comment_ids; return $this->comments; } _prime_comment_caches( $comment_ids, $this->query_vars['update_comment_meta_cache'] ); // Fetch full comment objects from the primed cache. $_comments = array(); foreach ( $comment_ids as $comment_id ) { if ( $_comment = get_comment( $comment_id ) ) { $_comments[] = $_comment; } } // Prime comment post caches. if ( $this->query_vars['update_comment_post_cache'] ) { $comment_post_ids = array(); foreach ( $_comments as $_comment ) { $comment_post_ids[] = $_comment->comment_post_ID; } _prime_post_caches( $comment_post_ids, false, false ); } /* * Filters the comment query results. * * @since 3.1.0 * * @param WP_Comment[] $_comments An array of comments. * @param WP_Comment_Query $this Current instance of WP_Comment_Query (passed by reference). / $_comments = apply_filters_ref_array( 'the_comments', array( $_comments, &$this ) ); // Convert to WP_Comment instances $comments = array_map( 'get_comment', $_comments ); if ( $this->query_vars['hierarchical'] ) { $comments = $this->fill_descendants( $comments ); } $this->comments = $comments; return $this->comments; } /* * Used internally to get a list of comment IDs matching the query vars. * * @since 4.4.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @return int\|array A single count of comment IDs if a count query. An array of comment IDs if a full query. / protected function get_comment_ids() { global $wpdb; // Assemble clauses related to 'comment_approved'. $approved_clauses = array(); // 'status' accepts an array or a comma-separated string. $status_clauses = array(); $statuses = wp_parse_list( $this->query_vars['status'] ); // Empty 'status' should be interpreted as 'all'. if ( empty( $statuses ) ) { $statuses = array( 'all' ); } // 'any' overrides other statuses. if ( ! in_array( 'any', $statuses ) ) { foreach ( $statuses as $status ) { switch ( $status ) { case 'hold': $status_clauses[] = "comment_approved = '0'"; break; case 'approve': $status_clauses[] = "comment_approved = '1'"; break; case 'all': case '': $status_clauses[] = "( comment_approved = '0' OR comment_approved = '1' )"; break; default: $status_clauses[] = $wpdb->prepare( 'comment_approved = %s', $status ); break; } } if ( ! empty( $status_clauses ) ) { $approved_clauses[] = '( ' . implode( ' OR ', $status_clauses ) . ' )'; } } // User IDs or emails whose unapproved comments are included, regardless of $status. if ( ! empty( $this->query_vars['include_unapproved'] ) ) { $include_unapproved = wp_parse_list( $this->query_vars['include_unapproved'] ); $unapproved_ids = array(); $unapproved_emails = array(); foreach ( $include_unapproved as $unapproved_identifier ) { // Numeric values are assumed to be user ids. if ( is_numeric( $unapproved_identifier ) ) { $approved_clauses[] = $wpdb->prepare( "( user_id = %d AND comment_approved = '0' )", $unapproved_identifier ); } else { // Otherwise we match against email addresses. if ( ! empty( $_GET['unapproved'] ) && ! empty( $_GET['moderation-hash'] ) ) { // Only include requested comment. $approved_clauses[] = $wpdb->prepare( "( comment_author_email = %s AND comment_approved = '0' AND comment_ID = %d )", $unapproved_identifier, (int) $_GET['unapproved'] ); } else { // Include all of the author's unapproved comments. $approved_clauses[] = $wpdb->prepare( "( comment_author_email = %s AND comment_approved = '0' )", $unapproved_identifier ); } } } } // Collapse comment_approved clauses into a single OR-separated clause. if ( ! empty( $approved_clauses ) ) { if ( 1 === count( $approved_clauses ) ) { $this->sql_clauses['where']['approved'] = $approved_clauses[0]; } else { $this->sql_clauses['where']['approved'] = '( ' . implode( ' OR ', $approved_clauses ) . ' )'; } } $order = ( 'ASC' == strtoupper( $this->query_vars['order'] ) ) ? 'ASC' : 'DESC'; // Disable ORDER BY with 'none', an empty array, or boolean false. if ( in_array( $this->query_vars['orderby'], array( 'none', array(), false ), true ) ) { $orderby = ''; } elseif ( ! empty( $this->query_vars['orderby'] ) ) { $ordersby = is_array( $this->query_vars['orderby'] ) ? $this->query_vars['orderby'] : preg_split( '/[,\s]/', $this->query_vars['orderby'] ); $orderby_array = array(); $found_orderby_comment_id = false; foreach ( $ordersby as $_key => $_value ) { if ( ! $_value ) { continue; } if ( is_int( $_key ) ) { $_orderby = $_value; $_order = $order; } else { $_orderby = $_key; $_order = $_value; } if ( ! $found_orderby_comment_id && in_array( $_orderby, array( 'comment_ID', 'comment__in' ) ) ) { $found_orderby_comment_id = true; } $parsed = $this->parse_orderby( $_orderby ); if ( ! $parsed ) { continue; } if ( 'comment__in' === $_orderby ) { $orderby_array[] = $parsed; continue; } $orderby_array[] = $parsed . ' ' . $this->parse_order( $_order ); } // If no valid clauses were found, order by comment_date_gmt. if ( empty( $orderby_array ) ) { $orderby_array[] = "$wpdb->comments.comment_date_gmt $order"; } // To ensure determinate sorting, always include a comment_ID clause. if ( ! $found_orderby_comment_id ) { $comment_id_order = ''; // Inherit order from comment_date or comment_date_gmt, if available. foreach ( $orderby_array as $orderby_clause ) { if ( preg_match( '/comment_date(?:_gmt)\ (ASC\|DESC)/', $orderby_clause, $match ) ) { $comment_id_order = $match[1]; break; } } // If no date-related order is available, use the date from the first available clause. if ( ! $comment_id_order ) { foreach ( $orderby_array as $orderby_clause ) { if ( false !== strpos( 'ASC', $orderby_clause ) ) { $comment_id_order = 'ASC'; } else { $comment_id_order = 'DESC'; } break; } } // Default to DESC. if ( ! $comment_id_order ) { $comment_id_order = 'DESC'; } $orderby_array[] = "$wpdb->comments.comment_ID $comment_id_order"; } $orderby = implode( ', ', $orderby_array ); } else { $orderby = "$wpdb->comments.comment_date_gmt $order"; } $number = absint( $this->query_vars['number'] ); $offset = absint( $this->query_vars['offset'] ); $paged = absint( $this->query_vars['paged'] ); $limits = ''; if ( ! empty( $number ) ) { if ( $offset ) { $limits = 'LIMIT ' . $offset . ',' . $number; } else { $limits = 'LIMIT ' . ( $number * ( $paged - 1 ) ) . ',' . $number; } } if ( $this->query_vars['count'] ) { $fields = 'COUNT()'; } else { $fields = "$wpdb->comments.comment_ID"; } $post_id = absint( $this->query_vars['post_id'] ); if ( ! empty( $post_id ) ) { $this->sql_clauses['where']['post_id'] = $wpdb->prepare( 'comment_post_ID = %d', $post_id ); } // Parse comment IDs for an IN clause. if ( ! empty( $this->query_vars['comment__in'] ) ) { $this->sql_clauses['where']['comment__in'] = "$wpdb->comments.comment_ID IN ( " . implode( ',', wp_parse_id_list( $this->query_vars['comment__in'] ) ) . ' )'; } // Parse comment IDs for a NOT IN clause. if ( ! empty( $this->query_vars['comment__not_in'] ) ) { $this->sql_clauses['where']['comment__not_in'] = "$wpdb->comments.comment_ID NOT IN ( " . implode( ',', wp_parse_id_list( $this->query_vars['comment__not_in'] ) ) . ' )'; } // Parse comment parent IDs for an IN clause. if ( ! empty( $this->query_vars['parent__in'] ) ) { $this->sql_clauses['where']['parent__in'] = 'comment_parent IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['parent__in'] ) ) . ' )'; } // Parse comment parent IDs for a NOT IN clause. if ( ! empty( $this->query_vars['parent__not_in'] ) ) { $this->sql_clauses['where']['parent__not_in'] = 'comment_parent NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['parent__not_in'] ) ) . ' )'; } // Parse comment post IDs for an IN clause. if ( ! empty( $this->query_vars['post__in'] ) ) { $this->sql_clauses['where']['post__in'] = 'comment_post_ID IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['post__in'] ) ) . ' )'; } // Parse comment post IDs for a NOT IN clause. if ( ! empty( $this->query_vars['post__not_in'] ) ) { $this->sql_clauses['where']['post__not_in'] = 'comment_post_ID NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['post__not_in'] ) ) . ' )'; } if ( '' !== $this->query_vars['author_email'] ) { $this->sql_clauses['where']['author_email'] = $wpdb->prepare( 'comment_author_email = %s', $this->query_vars['author_email'] ); } if ( '' !== $this->query_vars['author_url'] ) { $this->sql_clauses['where']['author_url'] = $wpdb->prepare( 'comment_author_url = %s', $this->query_vars['author_url'] ); } if ( '' !== $this->query_vars['karma'] ) { $this->sql_clauses['where']['karma'] = $wpdb->prepare( 'comment_karma = %d', $this->query_vars['karma'] ); } // Filtering by comment_type: 'type', 'type__in', 'type__not_in'. $raw_types = array( 'IN' => array_merge( (array) $this->query_vars['type'], (array) $this->query_vars['type__in'] ), 'NOT IN' => (array) $this->query_vars['type__not_in'], ); $comment_types = array(); foreach ( $raw_types as $operator => $_raw_types ) { $_raw_types = array_unique( $_raw_types ); foreach ( $_raw_types as $type ) { switch ( $type ) { // An empty translates to 'all', for backward compatibility case '': case 'all': break; case 'comment': case 'comments': $comment_types[ $operator ][] = "''"; break; case 'pings': $comment_types[ $operator ][] = "'pingback'"; $comment_types[ $operator ][] = "'trackback'"; break; default: $comment_types[ $operator ][] = $wpdb->prepare( '%s', $type ); break; } } if ( ! empty( $comment_types[ $operator ] ) ) { $types_sql = implode( ', ', $comment_types[ $operator ] ); $this->sql_clauses['where'][ 'comment_type__' . strtolower( str_replace( ' ', '_', $operator ) ) ] = "comment_type $operator ($types_sql)"; } } $parent = $this->query_vars['parent']; if ( $this->query_vars['hierarchical'] && ! $parent ) { $parent = 0; } if ( '' !== $parent ) { $this->sql_clauses['where']['parent'] = $wpdb->prepare( 'comment_parent = %d', $parent ); } if ( is_array( $this->query_vars['user_id'] ) ) { $this->sql_clauses['where']['user_id'] = 'user_id IN (' . implode( ',', array_map( 'absint', $this->query_vars['user_id'] ) ) . ')'; } elseif ( '' !== $this->query_vars['user_id'] ) { $this->sql_clauses['where']['user_id'] = $wpdb->prepare( 'user_id = %d', $this->query_vars['user_id'] ); } // Falsy search strings are ignored. if ( strlen( $this->query_vars['search'] ) ) { $search_sql = $this->get_search_sql( $this->query_vars['search'], array( 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_author_IP', 'comment_content' ) ); // Strip leading 'AND'. $this->sql_clauses['where']['search'] = preg_replace( '/^\sAND\s/', '', $search_sql ); } // If any post-related query vars are passed, join the posts table. $join_posts_table = false; $plucked = wp_array_slice_assoc( $this->query_vars, array( 'post_author', 'post_name', 'post_parent' ) ); $post_fields = array_filter( $plucked ); if ( ! empty( $post_fields ) ) { $join_posts_table = true; foreach ( $post_fields as $field_name => $field_value ) { // $field_value may be an array. $esses = array_fill( 0, count( (array) $field_value ), '%s' ); $this->sql_clauses['where'][ $field_name ] = $wpdb->prepare( " {$wpdb->posts}.{$field_name} IN (" . implode( ',', $esses ) . ')', $field_value ); } } // 'post_status' and 'post_type' are handled separately, due to the specialized behavior of 'any'. foreach ( array( 'post_status', 'post_type' ) as $field_name ) { $q_values = array(); if ( ! empty( $this->query_vars[ $field_name ] ) ) { $q_values = $this->query_vars[ $field_name ]; if ( ! is_array( $q_values ) ) { $q_values = explode( ',', $q_values ); } // 'any' will cause the query var to be ignored. if ( in_array( 'any', $q_values, true ) \|\| empty( $q_values ) ) { continue; } $join_posts_table = true; $esses = array_fill( 0, count( $q_values ), '%s' ); $this->sql_clauses['where'][ $field_name ] = $wpdb->prepare( " {$wpdb->posts}.{$field_name} IN (" . implode( ',', $esses ) . ')', $q_values ); } } // Comment author IDs for an IN clause. if ( ! empty( $this->query_vars['author__in'] ) ) { $this->sql_clauses['where']['author__in'] = 'user_id IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['author__in'] ) ) . ' )'; } // Comment author IDs for a NOT IN clause. if ( ! empty( $this->query_vars['author__not_in'] ) ) { $this->sql_clauses['where']['author__not_in'] = 'user_id NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['author__not_in'] ) ) . ' )'; } // Post author IDs for an IN clause. if ( ! empty( $this->query_vars['post_author__in'] ) ) { $join_posts_table = true; $this->sql_clauses['where']['post_author__in'] = 'post_author IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['post_author__in'] ) ) . ' )'; } // Post author IDs for a NOT IN clause. if ( ! empty( $this->query_vars['post_author__not_in'] ) ) { $join_posts_table = true; $this->sql_clauses['where']['post_author__not_in'] = 'post_author NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['post_author__not_in'] ) ) . ' )'; } $join = ''; $groupby = ''; if ( $join_posts_table ) { $join .= "JOIN $wpdb->posts ON $wpdb->posts.ID = $wpdb->comments.comment_post_ID"; } if ( ! empty( $this->meta_query_clauses ) ) { $join .= $this->meta_query_clauses['join']; // Strip leading 'AND'. $this->sql_clauses['where']['meta_query'] = preg_replace( '/^\sAND\s/', '', $this->meta_query_clauses['where'] ); if ( ! $this->query_vars['count'] ) { $groupby = "{$wpdb->comments}.comment_ID"; } } if ( ! empty( $this->query_vars['date_query'] ) && is_array( $this->query_vars['date_query'] ) ) { $this->date_query = new WP_Date_Query( $this->query_vars['date_query'], 'comment_date' ); $this->sql_clauses['where']['date_query'] = preg_replace( '/^\sAND\s/', '', $this->date_query->get_sql() ); } $where = implode( ' AND ', $this->sql_clauses['where'] ); $pieces = array( 'fields', 'join', 'where', 'orderby', 'limits', 'groupby' ); /* * Filters the comment query clauses. * * @since 3.1.0 * * @param string[] $pieces An associative array of comment query clauses. * @param WP_Comment_Query $this Current instance of WP_Comment_Query (passed by reference). / $clauses = apply_filters_ref_array( 'comments_clauses', array( compact( $pieces ), &$this ) ); $fields = isset( $clauses['fields'] ) ? $clauses['fields'] : ''; $join = isset( $clauses['join'] ) ? $clauses['join'] : ''; $where = isset( $clauses['where'] ) ? $clauses['where'] : ''; $orderby = isset( $clauses['orderby'] ) ? $clauses['orderby'] : ''; $limits = isset( $clauses['limits'] ) ? $clauses['limits'] : ''; $groupby = isset( $clauses['groupby'] ) ? $clauses['groupby'] : ''; $this->filtered_where_clause = $where; if ( $where ) { $where = 'WHERE ' . $where; } if ( $groupby ) { $groupby = 'GROUP BY ' . $groupby; } if ( $orderby ) { $orderby = "ORDER BY $orderby"; } $found_rows = ''; if ( ! $this->query_vars['no_found_rows'] ) { $found_rows = 'SQL_CALC_FOUND_ROWS'; } $this->sql_clauses['select'] = "SELECT $found_rows $fields"; $this->sql_clauses['from'] = "FROM $wpdb->comments $join"; $this->sql_clauses['groupby'] = $groupby; $this->sql_clauses['orderby'] = $orderby; $this->sql_clauses['limits'] = $limits; $this->request = "{$this->sql_clauses['select']} {$this->sql_clauses['from']} {$where} {$this->sql_clauses['groupby']} {$this->sql_clauses['orderby']} {$this->sql_clauses['limits']}"; if ( $this->query_vars['count'] ) { return intval( $wpdb->get_var( $this->request ) ); } else { $comment_ids = $wpdb->get_col( $this->request ); return array_map( 'intval', $comment_ids ); } } /* * Populates found_comments and max_num_pages properties for the current * query if the limit clause was used. * * @since 4.6.0 * * @global wpdb $wpdb WordPress database abstraction object. / private function set_found_comments() { global $wpdb; if ( $this->query_vars['number'] && ! $this->query_vars['no_found_rows'] ) { /* * Filters the query used to retrieve found comment count. * * @since 4.4.0 * * @param string $found_comments_query SQL query. Default 'SELECT FOUND_ROWS()'. * @param WP_Comment_Query $comment_query The `WP_Comment_Query` instance. / $found_comments_query = apply_filters( 'found_comments_query', 'SELECT FOUND_ROWS()', $this ); $this->found_comments = (int) $wpdb->get_var( $found_comments_query ); } } /* * Fetch descendants for located comments. * * Instead of calling `get_children()` separately on each child comment, we do a single set of queries to fetch * the descendant trees for all matched top-level comments. * * @since 4.4.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @param WP_Comment[] $comments Array of top-level comments whose descendants should be filled in. * @return array / protected function fill_descendants( $comments ) { global $wpdb; $levels = array( 0 => wp_list_pluck( $comments, 'comment_ID' ), ); $key = md5( serialize( wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) ) ) ); $last_changed = wp_cache_get_last_changed( 'comment' ); // Fetch an entire level of the descendant tree at a time. $level = 0; $exclude_keys = array( 'parent', 'parent__in', 'parent__not_in' ); do { // Parent-child relationships may be cached. Only query for those that are not. $child_ids = $uncached_parent_ids = array(); $_parent_ids = $levels[ $level ]; foreach ( $_parent_ids as $parent_id ) { $cache_key = "get_comment_child_ids:$parent_id:$key:$last_changed"; $parent_child_ids = wp_cache_get( $cache_key, 'comment' ); if ( false !== $parent_child_ids ) { $child_ids = array_merge( $child_ids, $parent_child_ids ); } else { $uncached_parent_ids[] = $parent_id; } } if ( $uncached_parent_ids ) { // Fetch this level of comments. $parent_query_args = $this->query_vars; foreach ( $exclude_keys as $exclude_key ) { $parent_query_args[ $exclude_key ] = ''; } $parent_query_args['parent__in'] = $uncached_parent_ids; $parent_query_args['no_found_rows'] = true; $parent_query_args['hierarchical'] = false; $parent_query_args['offset'] = 0; $parent_query_args['number'] = 0; $level_comments = get_comments( $parent_query_args ); // Cache parent-child relationships. $parent_map = array_fill_keys( $uncached_parent_ids, array() ); foreach ( $level_comments as $level_comment ) { $parent_map[ $level_comment->comment_parent ][] = $level_comment->comment_ID; $child_ids[] = $level_comment->comment_ID; } foreach ( $parent_map as $parent_id => $children ) { $cache_key = "get_comment_child_ids:$parent_id:$key:$last_changed"; wp_cache_set( $cache_key, $children, 'comment' ); } } $level++; $levels[ $level ] = $child_ids; } while ( $child_ids ); // Prime comment caches for non-top-level comments. $descendant_ids = array(); for ( $i = 1, $c = count( $levels ); $i < $c; $i++ ) { $descendant_ids = array_merge( $descendant_ids, $levels[ $i ] ); } _prime_comment_caches( $descendant_ids, $this->query_vars['update_comment_meta_cache'] ); // Assemble a flat array of all comments + descendants. $all_comments = $comments; foreach ( $descendant_ids as $descendant_id ) { $all_comments[] = get_comment( $descendant_id ); } // If a threaded representation was requested, build the tree. if ( 'threaded' === $this->query_vars['hierarchical'] ) { $threaded_comments = $ref = array(); foreach ( $all_comments as $k => $c ) { $_c = get_comment( $c->comment_ID ); // If the comment isn't in the reference array, it goes in the top level of the thread. if ( ! isset( $ref[ $c->comment_parent ] ) ) { $threaded_comments[ $_c->comment_ID ] = $_c; $ref[ $_c->comment_ID ] = $threaded_comments[ $_c->comment_ID ]; // Otherwise, set it as a child of its parent. } else { $ref[ $_c->comment_parent ]->add_child( $_c ); $ref[ $_c->comment_ID ] = $ref[ $_c->comment_parent ]->get_child( $_c->comment_ID ); } } // Set the 'populated_children' flag, to ensure additional database queries aren't run. foreach ( $ref as $_ref ) { $_ref->populated_children( true ); } $comments = $threaded_comments; } else { $comments = $all_comments; } return $comments; } /* * Used internally to generate an SQL string for searching across multiple columns * * @since 3.1.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $string * @param array $cols * @return string / protected function get_search_sql( $string, $cols ) { global $wpdb; $like = '%' . $wpdb->esc_like( $string ) . '%'; $searches = array(); foreach ( $cols as $col ) { $searches[] = $wpdb->prepare( "$col LIKE %s", $like ); } return ' AND (' . implode( ' OR ', $searches ) . ')'; } /* * Parse and sanitize 'orderby' keys passed to the comment query. * * @since 4.2.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $orderby Alias for the field to order by. * @return string\|false Value to used in the ORDER clause. False otherwise. / protected function parse_orderby( $orderby ) { global $wpdb; $allowed_keys = array( 'comment_agent', 'comment_approved', 'comment_author', 'comment_author_email', 'comment_author_IP', 'comment_author_url', 'comment_content', 'comment_date', 'comment_date_gmt', 'comment_ID', 'comment_karma', 'comment_parent', 'comment_post_ID', 'comment_type', 'user_id', ); if ( ! empty( $this->query_vars['meta_key'] ) ) { $allowed_keys[] = $this->query_vars['meta_key']; $allowed_keys[] = 'meta_value'; $allowed_keys[] = 'meta_value_num'; } $meta_query_clauses = $this->meta_query->get_clauses(); if ( $meta_query_clauses ) { $allowed_keys = array_merge( $allowed_keys, array_keys( $meta_query_clauses ) ); } $parsed = false; if ( $orderby == $this->query_vars['meta_key'] \|\| $orderby == 'meta_value' ) { $parsed = "$wpdb->commentmeta.meta_value"; } elseif ( $orderby == 'meta_value_num' ) { $parsed = "$wpdb->commentmeta.meta_value+0"; } elseif ( $orderby == 'comment__in' ) { $comment__in = implode( ',', array_map( 'absint', $this->query_vars['comment__in'] ) ); $parsed = "FIELD( {$wpdb->comments}.comment_ID, $comment__in )"; } elseif ( in_array( $orderby, $allowed_keys ) ) { if ( isset( $meta_query_clauses[ $orderby ] ) ) { $meta_clause = $meta_query_clauses[ $orderby ]; $parsed = sprintf( 'CAST(%s.meta_value AS %s)', esc_sql( $meta_clause['alias'] ), esc_sql( $meta_clause['cast'] ) ); } else { $parsed = "$wpdb->comments.$orderby"; } } return $parsed; } /* * Parse an 'order' query variable and cast it to ASC or DESC as necessary. * * @since 4.2.0 * * @param string $order The 'order' query variable. * @return string The sanitized 'order' query variable. */ protected function parse_order( $order ) { if ( ! is_string( $order ) \|\| empty( $order ) ) { return 'DESC'; } if ( 'ASC' === strtoupper( $order ) ) { return 'ASC'; } else { return 'DESC'; } } } Back

Edit File : class-wp-comment-query.php | Size : 42.21 KB

<?php
/**
 * Comment API: WP_Comment_Query class
 *
 * @package WordPress
 * @subpackage Comments
 * @since 4.4.0
 */

/**
 * Core class used for querying comments.
 *
 * @since 3.1.0
 *
 * @see WP_Comment_Query::__construct() for accepted arguments.
 */
class WP_Comment_Query {

/**
	 * SQL for database query.
	 *
	 * @since 4.0.1
	 * @var string
	 */
	public $request;

/**
	 * Metadata query container
	 *
	 * @since 3.5.0
	 * @var object WP_Meta_Query
	 */
	public $meta_query = false;

/**
	 * Metadata query clauses.
	 *
	 * @since 4.4.0
	 * @var array
	 */
	protected $meta_query_clauses;

/**
	 * SQL query clauses.
	 *
	 * @since 4.4.0
	 * @var array
	 */
	protected $sql_clauses = array(
		'select'  => '',
		'from'    => '',
		'where'   => array(),
		'groupby' => '',
		'orderby' => '',
		'limits'  => '',
	);

/**
	 * SQL WHERE clause.
	 *
	 * Stored after the {@see 'comments_clauses'} filter is run on the compiled WHERE sub-clauses.
	 *
	 * @since 4.4.2
	 * @var string
	 */
	protected $filtered_where_clause;

/**
	 * Date query container
	 *
	 * @since 3.7.0
	 * @var object WP_Date_Query
	 */
	public $date_query = false;

/**
	 * Query vars set by the user.
	 *
	 * @since 3.1.0
	 * @var array
	 */
	public $query_vars;

/**
	 * Default values for query vars.
	 *
	 * @since 4.2.0
	 * @var array
	 */
	public $query_var_defaults;

/**
	 * List of comments located by the query.
	 *
	 * @since 4.0.0
	 * @var array
	 */
	public $comments;

/**
	 * The amount of found comments for the current query.
	 *
	 * @since 4.4.0
	 * @var int
	 */
	public $found_comments = 0;

/**
	 * The number of pages.
	 *
	 * @since 4.4.0
	 * @var int
	 */
	public $max_num_pages = 0;

/**
	 * Make private/protected methods readable for backward compatibility.
	 *
	 * @since 4.0.0
	 *
	 * @param string   $name      Method to call.
	 * @param array    $arguments Arguments to pass when calling.
	 * @return mixed|false Return value of the callback, false otherwise.
	 */
	public function __call( $name, $arguments ) {
		if ( 'get_search_sql' === $name ) {
			return call_user_func_array( array( $this, $name ), $arguments );
		}
		return false;
	}

/**
	 * Constructor.
	 *
	 * Sets up the comment query, based on the query vars passed.
	 *
	 * @since 4.2.0
	 * @since 4.4.0 `$parent__in` and `$parent__not_in` were added.
	 * @since 4.4.0 Order by `comment__in` was added. `$update_comment_meta_cache`, `$no_found_rows`,
	 *              `$hierarchical`, and `$update_comment_post_cache` were added.
	 * @since 4.5.0 Introduced the `$author_url` argument.
	 * @since 4.6.0 Introduced the `$cache_domain` argument.
	 * @since 4.9.0 Introduced the `$paged` argument.
	 *
	 * @param string|array $query {
	 *     Optional. Array or query string of comment query parameters. Default empty.
	 *
	 *     @type string       $author_email              Comment author email address. Default empty.
	 *     @type string       $author_url                Comment author URL. Default empty.
	 *     @type array        $author__in                Array of author IDs to include comments for. Default empty.
	 *     @type array        $author__not_in            Array of author IDs to exclude comments for. Default empty.
	 *     @type array        $comment__in               Array of comment IDs to include. Default empty.
	 *     @type array        $comment__not_in           Array of comment IDs to exclude. Default empty.
	 *     @type bool         $count                     Whether to return a comment count (true) or array of
	 *                                                   comment objects (false). Default false.
	 *     @type array        $date_query                Date query clauses to limit comments by. See WP_Date_Query.
	 *                                                   Default null.
	 *     @type string       $fields                    Comment fields to return. Accepts 'ids' for comment IDs
	 *                                                   only or empty for all fields. Default empty.
	 *     @type int          $ID                        Currently unused.
	 *     @type array        $include_unapproved        Array of IDs or email addresses of users whose unapproved
	 *                                                   comments will be returned by the query regardless of
	 *                                                   `$status`. Default empty.
	 *     @type int          $karma                     Karma score to retrieve matching comments for.
	 *                                                   Default empty.
	 *     @type string       $meta_key                  Include comments with a matching comment meta key.
	 *                                                   Default empty.
	 *     @type string       $meta_value                Include comments with a matching comment meta value.
	 *                                                   Requires `$meta_key` to be set. Default empty.
	 *     @type array        $meta_query                Meta query clauses to limit retrieved comments by.
	 *                                                   See WP_Meta_Query. Default empty.
	 *     @type int          $number                    Maximum number of comments to retrieve.
	 *                                                   Default empty (no limit).
	 *     @type int          $paged                     When used with $number, defines the page of results to return.
	 *                                                   When used with $offset, $offset takes precedence. Default 1.
	 *     @type int          $offset                    Number of comments to offset the query. Used to build
	 *                                                   LIMIT clause. Default 0.
	 *     @type bool         $no_found_rows             Whether to disable the `SQL_CALC_FOUND_ROWS` query.
	 *                                                   Default: true.
	 *     @type string|array $orderby                   Comment status or array of statuses. To use 'meta_value'
	 *                                                   or 'meta_value_num', `$meta_key` must also be defined.
	 *                                                   To sort by a specific `$meta_query` clause, use that
	 *                                                   clause's array key. Accepts 'comment_agent',
	 *                                                   'comment_approved', 'comment_author',
	 *                                                   'comment_author_email', 'comment_author_IP',
	 *                                                   'comment_author_url', 'comment_content', 'comment_date',
	 *                                                   'comment_date_gmt', 'comment_ID', 'comment_karma',
	 *                                                   'comment_parent', 'comment_post_ID', 'comment_type',
	 *                                                   'user_id', 'comment__in', 'meta_value', 'meta_value_num',
	 *                                                   the value of $meta_key, and the array keys of
	 *                                                   `$meta_query`. Also accepts false, an empty array, or
	 *                                                   'none' to disable `ORDER BY` clause.
	 *                                                   Default: 'comment_date_gmt'.
	 *     @type string       $order                     How to order retrieved comments. Accepts 'ASC', 'DESC'.
	 *                                                   Default: 'DESC'.
	 *     @type int          $parent                    Parent ID of comment to retrieve children of.
	 *                                                   Default empty.
	 *     @type array        $parent__in                Array of parent IDs of comments to retrieve children for.
	 *                                                   Default empty.
	 *     @type array        $parent__not_in            Array of parent IDs of comments *not* to retrieve
	 *                                                   children for. Default empty.
	 *     @type array        $post_author__in           Array of author IDs to retrieve comments for.
	 *                                                   Default empty.
	 *     @type array        $post_author__not_in       Array of author IDs *not* to retrieve comments for.
	 *                                                   Default empty.
	 *     @type int          $post_ID                   Currently unused.
	 *     @type int          $post_id                   Limit results to those affiliated with a given post ID.
	 *                                                   Default 0.
	 *     @type array        $post__in                  Array of post IDs to include affiliated comments for.
	 *                                                   Default empty.
	 *     @type array        $post__not_in              Array of post IDs to exclude affiliated comments for.
	 *                                                   Default empty.
	 *     @type int          $post_author               Post author ID to limit results by. Default empty.
	 *     @type string|array $post_status               Post status or array of post statuses to retrieve
	 *                                                   affiliated comments for. Pass 'any' to match any value.
	 *                                                   Default empty.
	 *     @type string       $post_type                 Post type or array of post types to retrieve affiliated
	 *                                                   comments for. Pass 'any' to match any value. Default empty.
	 *     @type string       $post_name                 Post name to retrieve affiliated comments for.
	 *                                                   Default empty.
	 *     @type int          $post_parent               Post parent ID to retrieve affiliated comments for.
	 *                                                   Default empty.
	 *     @type string       $search                    Search term(s) to retrieve matching comments for.
	 *                                                   Default empty.
	 *     @type string|array $status                    Comment stati to limit results by. Accepts an array
	 *                                                   or space/comma-separated list of 'hold' (`comment_status=0`),
	 *                                                   'approve' (`comment_status=1`), 'all', or a custom
	 *                                                   comment status. Default 'all'.
	 *     @type string|array $type                      Include comments of a given type, or array of types.
	 *                                                   Accepts 'comment', 'pings' (includes 'pingback' and
	 *                                                   'trackback'), or anycustom type string. Default empty.
	 *     @type array        $type__in                  Include comments from a given array of comment types.
	 *                                                   Default empty.
	 *     @type array        $type__not_in              Exclude comments from a given array of comment types.
	 *                                                   Default empty.
	 *     @type int          $user_id                   Include comments for a specific user ID. Default empty.
	 *     @type bool|string  $hierarchical              Whether to include comment descendants in the results.
	 *                                                   'threaded' returns a tree, with each comment's children
	 *                                                   stored in a `children` property on the `WP_Comment`
	 *                                                   object. 'flat' returns a flat array of found comments plus
	 *                                                   their children. Pass `false` to leave out descendants.
	 *                                                   The parameter is ignored (forced to `false`) when
	 *                                                   `$fields` is 'ids' or 'counts'. Accepts 'threaded',
	 *                                                   'flat', or false. Default: false.
	 *     @type string       $cache_domain              Unique cache key to be produced when this query is stored in
	 *                                                   an object cache. Default is 'core'.
	 *     @type bool         $update_comment_meta_cache Whether to prime the metadata cache for found comments.
	 *                                                   Default true.
	 *     @type bool         $update_comment_post_cache Whether to prime the cache for comment posts.
	 *                                                   Default false.
	 * }
	 */
	public function __construct( $query = '' ) {
		$this->query_var_defaults = array(
			'author_email'              => '',
			'author_url'                => '',
			'author__in'                => '',
			'author__not_in'            => '',
			'include_unapproved'        => '',
			'fields'                    => '',
			'ID'                        => '',
			'comment__in'               => '',
			'comment__not_in'           => '',
			'karma'                     => '',
			'number'                    => '',
			'offset'                    => '',
			'no_found_rows'             => true,
			'orderby'                   => '',
			'order'                     => 'DESC',
			'paged'                     => 1,
			'parent'                    => '',
			'parent__in'                => '',
			'parent__not_in'            => '',
			'post_author__in'           => '',
			'post_author__not_in'       => '',
			'post_ID'                   => '',
			'post_id'                   => 0,
			'post__in'                  => '',
			'post__not_in'              => '',
			'post_author'               => '',
			'post_name'                 => '',
			'post_parent'               => '',
			'post_status'               => '',
			'post_type'                 => '',
			'status'                    => 'all',
			'type'                      => '',
			'type__in'                  => '',
			'type__not_in'              => '',
			'user_id'                   => '',
			'search'                    => '',
			'count'                     => false,
			'meta_key'                  => '',
			'meta_value'                => '',
			'meta_query'                => '',
			'date_query'                => null, // See WP_Date_Query
			'hierarchical'              => false,
			'cache_domain'              => 'core',
			'update_comment_meta_cache' => true,
			'update_comment_post_cache' => false,
		);

if ( ! empty( $query ) ) {
			$this->query( $query );
		}
	}

/**
	 * Parse arguments passed to the comment query with default query parameters.
	 *
	 * @since 4.2.0 Extracted from WP_Comment_Query::query().
	 *
	 * @param string|array $query WP_Comment_Query arguments. See WP_Comment_Query::__construct()
	 */
	public function parse_query( $query = '' ) {
		if ( empty( $query ) ) {
			$query = $this->query_vars;
		}

$this->query_vars = wp_parse_args( $query, $this->query_var_defaults );

/**
		 * Fires after the comment query vars have been parsed.
		 *
		 * @since 4.2.0
		 *
		 * @param WP_Comment_Query $this The WP_Comment_Query instance (passed by reference).
		 */
		do_action_ref_array( 'parse_comment_query', array( &$this ) );
	}

/**
	 * Sets up the WordPress query for retrieving comments.
	 *
	 * @since 3.1.0
	 * @since 4.1.0 Introduced 'comment__in', 'comment__not_in', 'post_author__in',
	 *              'post_author__not_in', 'author__in', 'author__not_in', 'post__in',
	 *              'post__not_in', 'include_unapproved', 'type__in', and 'type__not_in'
	 *              arguments to $query_vars.
	 * @since 4.2.0 Moved parsing to WP_Comment_Query::parse_query().
	 *
	 * @param string|array $query Array or URL query string of parameters.
	 * @return array|int List of comments, or number of comments when 'count' is passed as a query var.
	 */
	public function query( $query ) {
		$this->query_vars = wp_parse_args( $query );
		return $this->get_comments();
	}

/**
	 * Get a list of comments matching the query vars.
	 *
	 * @since 4.2.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * @return int|array List of comments or number of found comments if `$count` argument is true.
	 */
	public function get_comments() {
		global $wpdb;

$this->parse_query();

// Parse meta query
		$this->meta_query = new WP_Meta_Query();
		$this->meta_query->parse_query_vars( $this->query_vars );

/**
		 * Fires before comments are retrieved.
		 *
		 * @since 3.1.0
		 *
		 * @param WP_Comment_Query $this Current instance of WP_Comment_Query (passed by reference).
		 */
		do_action_ref_array( 'pre_get_comments', array( &$this ) );

// Reparse query vars, in case they were modified in a 'pre_get_comments' callback.
		$this->meta_query->parse_query_vars( $this->query_vars );
		if ( ! empty( $this->meta_query->queries ) ) {
			$this->meta_query_clauses = $this->meta_query->get_sql( 'comment', $wpdb->comments, 'comment_ID', $this );
		}

/*
		 * Only use the args defined in the query_var_defaults to compute the key,
		 * but ignore 'fields', which does not affect query results.
		 */
		$_args = wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) );
		unset( $_args['fields'] );

$key          = md5( serialize( $_args ) );
		$last_changed = wp_cache_get_last_changed( 'comment' );

$cache_key   = "get_comments:$key:$last_changed";
		$cache_value = wp_cache_get( $cache_key, 'comment' );
		if ( false === $cache_value ) {
			$comment_ids = $this->get_comment_ids();
			if ( $comment_ids ) {
				$this->set_found_comments();
			}

$cache_value = array(
				'comment_ids'    => $comment_ids,
				'found_comments' => $this->found_comments,
			);
			wp_cache_add( $cache_key, $cache_value, 'comment' );
		} else {
			$comment_ids          = $cache_value['comment_ids'];
			$this->found_comments = $cache_value['found_comments'];
		}

if ( $this->found_comments && $this->query_vars['number'] ) {
			$this->max_num_pages = ceil( $this->found_comments / $this->query_vars['number'] );
		}

// If querying for a count only, there's nothing more to do.
		if ( $this->query_vars['count'] ) {
			// $comment_ids is actually a count in this case.
			return intval( $comment_ids );
		}

$comment_ids = array_map( 'intval', $comment_ids );

if ( 'ids' == $this->query_vars['fields'] ) {
			$this->comments = $comment_ids;
			return $this->comments;
		}

_prime_comment_caches( $comment_ids, $this->query_vars['update_comment_meta_cache'] );

// Fetch full comment objects from the primed cache.
		$_comments = array();
		foreach ( $comment_ids as $comment_id ) {
			if ( $_comment = get_comment( $comment_id ) ) {
				$_comments[] = $_comment;
			}
		}

// Prime comment post caches.
		if ( $this->query_vars['update_comment_post_cache'] ) {
			$comment_post_ids = array();
			foreach ( $_comments as $_comment ) {
				$comment_post_ids[] = $_comment->comment_post_ID;
			}

_prime_post_caches( $comment_post_ids, false, false );
		}

/**
		 * Filters the comment query results.
		 *
		 * @since 3.1.0
		 *
		 * @param WP_Comment[]     $_comments An array of comments.
		 * @param WP_Comment_Query $this      Current instance of WP_Comment_Query (passed by reference).
		 */
		$_comments = apply_filters_ref_array( 'the_comments', array( $_comments, &$this ) );

// Convert to WP_Comment instances
		$comments = array_map( 'get_comment', $_comments );

if ( $this->query_vars['hierarchical'] ) {
			$comments = $this->fill_descendants( $comments );
		}

$this->comments = $comments;
		return $this->comments;
	}

/**
	 * Used internally to get a list of comment IDs matching the query vars.
	 *
	 * @since 4.4.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * @return int|array A single count of comment IDs if a count query. An array of comment IDs if a full query.
	 */
	protected function get_comment_ids() {
		global $wpdb;

// Assemble clauses related to 'comment_approved'.
		$approved_clauses = array();

// 'status' accepts an array or a comma-separated string.
		$status_clauses = array();
		$statuses       = wp_parse_list( $this->query_vars['status'] );

// Empty 'status' should be interpreted as 'all'.
		if ( empty( $statuses ) ) {
			$statuses = array( 'all' );
		}

// 'any' overrides other statuses.
		if ( ! in_array( 'any', $statuses ) ) {
			foreach ( $statuses as $status ) {
				switch ( $status ) {
					case 'hold':
						$status_clauses[] = "comment_approved = '0'";
						break;

case 'approve':
						$status_clauses[] = "comment_approved = '1'";
						break;

case 'all':
					case '':
						$status_clauses[] = "( comment_approved = '0' OR comment_approved = '1' )";
						break;

default:
						$status_clauses[] = $wpdb->prepare( 'comment_approved = %s', $status );
						break;
				}
			}

if ( ! empty( $status_clauses ) ) {
				$approved_clauses[] = '( ' . implode( ' OR ', $status_clauses ) . ' )';
			}
		}

// User IDs or emails whose unapproved comments are included, regardless of $status.
		if ( ! empty( $this->query_vars['include_unapproved'] ) ) {
			$include_unapproved = wp_parse_list( $this->query_vars['include_unapproved'] );

$unapproved_ids    = array();
			$unapproved_emails = array();
			foreach ( $include_unapproved as $unapproved_identifier ) {
				// Numeric values are assumed to be user ids.
				if ( is_numeric( $unapproved_identifier ) ) {
					$approved_clauses[] = $wpdb->prepare( "( user_id = %d AND comment_approved = '0' )", $unapproved_identifier );
				} else {
					// Otherwise we match against email addresses.
					if ( ! empty( $_GET['unapproved'] ) && ! empty( $_GET['moderation-hash'] ) ) {
						// Only include requested comment.
						$approved_clauses[] = $wpdb->prepare( "( comment_author_email = %s AND comment_approved = '0' AND comment_ID = %d )", $unapproved_identifier, (int) $_GET['unapproved'] );
					} else {
						// Include all of the author's unapproved comments.
						$approved_clauses[] = $wpdb->prepare( "( comment_author_email = %s AND comment_approved = '0' )", $unapproved_identifier );
					}
				}
			}
		}

// Collapse comment_approved clauses into a single OR-separated clause.
		if ( ! empty( $approved_clauses ) ) {
			if ( 1 === count( $approved_clauses ) ) {
				$this->sql_clauses['where']['approved'] = $approved_clauses[0];
			} else {
				$this->sql_clauses['where']['approved'] = '( ' . implode( ' OR ', $approved_clauses ) . ' )';
			}
		}

$order = ( 'ASC' == strtoupper( $this->query_vars['order'] ) ) ? 'ASC' : 'DESC';

// Disable ORDER BY with 'none', an empty array, or boolean false.
		if ( in_array( $this->query_vars['orderby'], array( 'none', array(), false ), true ) ) {
			$orderby = '';
		} elseif ( ! empty( $this->query_vars['orderby'] ) ) {
			$ordersby = is_array( $this->query_vars['orderby'] ) ?
				$this->query_vars['orderby'] :
				preg_split( '/[,\s]/', $this->query_vars['orderby'] );

$orderby_array            = array();
			$found_orderby_comment_id = false;
			foreach ( $ordersby as $_key => $_value ) {
				if ( ! $_value ) {
					continue;
				}

if ( is_int( $_key ) ) {
					$_orderby = $_value;
					$_order   = $order;
				} else {
					$_orderby = $_key;
					$_order   = $_value;
				}

if ( ! $found_orderby_comment_id && in_array( $_orderby, array( 'comment_ID', 'comment__in' ) ) ) {
					$found_orderby_comment_id = true;
				}

$parsed = $this->parse_orderby( $_orderby );

if ( ! $parsed ) {
					continue;
				}

if ( 'comment__in' === $_orderby ) {
					$orderby_array[] = $parsed;
					continue;
				}

$orderby_array[] = $parsed . ' ' . $this->parse_order( $_order );
			}

// If no valid clauses were found, order by comment_date_gmt.
			if ( empty( $orderby_array ) ) {
				$orderby_array[] = "$wpdb->comments.comment_date_gmt $order";
			}

// To ensure determinate sorting, always include a comment_ID clause.
			if ( ! $found_orderby_comment_id ) {
				$comment_id_order = '';

// Inherit order from comment_date or comment_date_gmt, if available.
				foreach ( $orderby_array as $orderby_clause ) {
					if ( preg_match( '/comment_date(?:_gmt)*\ (ASC|DESC)/', $orderby_clause, $match ) ) {
						$comment_id_order = $match[1];
						break;
					}
				}

// If no date-related order is available, use the date from the first available clause.
				if ( ! $comment_id_order ) {
					foreach ( $orderby_array as $orderby_clause ) {
						if ( false !== strpos( 'ASC', $orderby_clause ) ) {
							$comment_id_order = 'ASC';
						} else {
							$comment_id_order = 'DESC';
						}

break;
					}
				}

// Default to DESC.
				if ( ! $comment_id_order ) {
					$comment_id_order = 'DESC';
				}

$orderby_array[] = "$wpdb->comments.comment_ID $comment_id_order";
			}

$orderby = implode( ', ', $orderby_array );
		} else {
			$orderby = "$wpdb->comments.comment_date_gmt $order";
		}

$number = absint( $this->query_vars['number'] );
		$offset = absint( $this->query_vars['offset'] );
		$paged  = absint( $this->query_vars['paged'] );
		$limits = '';

if ( ! empty( $number ) ) {
			if ( $offset ) {
				$limits = 'LIMIT ' . $offset . ',' . $number;
			} else {
				$limits = 'LIMIT ' . ( $number * ( $paged - 1 ) ) . ',' . $number;
			}
		}

if ( $this->query_vars['count'] ) {
			$fields = 'COUNT(*)';
		} else {
			$fields = "$wpdb->comments.comment_ID";
		}

$post_id = absint( $this->query_vars['post_id'] );
		if ( ! empty( $post_id ) ) {
			$this->sql_clauses['where']['post_id'] = $wpdb->prepare( 'comment_post_ID = %d', $post_id );
		}

// Parse comment IDs for an IN clause.
		if ( ! empty( $this->query_vars['comment__in'] ) ) {
			$this->sql_clauses['where']['comment__in'] = "$wpdb->comments.comment_ID IN ( " . implode( ',', wp_parse_id_list( $this->query_vars['comment__in'] ) ) . ' )';
		}

// Parse comment IDs for a NOT IN clause.
		if ( ! empty( $this->query_vars['comment__not_in'] ) ) {
			$this->sql_clauses['where']['comment__not_in'] = "$wpdb->comments.comment_ID NOT IN ( " . implode( ',', wp_parse_id_list( $this->query_vars['comment__not_in'] ) ) . ' )';
		}

// Parse comment parent IDs for an IN clause.
		if ( ! empty( $this->query_vars['parent__in'] ) ) {
			$this->sql_clauses['where']['parent__in'] = 'comment_parent IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['parent__in'] ) ) . ' )';
		}

// Parse comment parent IDs for a NOT IN clause.
		if ( ! empty( $this->query_vars['parent__not_in'] ) ) {
			$this->sql_clauses['where']['parent__not_in'] = 'comment_parent NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['parent__not_in'] ) ) . ' )';
		}

// Parse comment post IDs for an IN clause.
		if ( ! empty( $this->query_vars['post__in'] ) ) {
			$this->sql_clauses['where']['post__in'] = 'comment_post_ID IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['post__in'] ) ) . ' )';
		}

// Parse comment post IDs for a NOT IN clause.
		if ( ! empty( $this->query_vars['post__not_in'] ) ) {
			$this->sql_clauses['where']['post__not_in'] = 'comment_post_ID NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['post__not_in'] ) ) . ' )';
		}

if ( '' !== $this->query_vars['author_email'] ) {
			$this->sql_clauses['where']['author_email'] = $wpdb->prepare( 'comment_author_email = %s', $this->query_vars['author_email'] );
		}

if ( '' !== $this->query_vars['author_url'] ) {
			$this->sql_clauses['where']['author_url'] = $wpdb->prepare( 'comment_author_url = %s', $this->query_vars['author_url'] );
		}

if ( '' !== $this->query_vars['karma'] ) {
			$this->sql_clauses['where']['karma'] = $wpdb->prepare( 'comment_karma = %d', $this->query_vars['karma'] );
		}

// Filtering by comment_type: 'type', 'type__in', 'type__not_in'.
		$raw_types = array(
			'IN'     => array_merge( (array) $this->query_vars['type'], (array) $this->query_vars['type__in'] ),
			'NOT IN' => (array) $this->query_vars['type__not_in'],
		);

$comment_types = array();
		foreach ( $raw_types as $operator => $_raw_types ) {
			$_raw_types = array_unique( $_raw_types );

foreach ( $_raw_types as $type ) {
				switch ( $type ) {
					// An empty translates to 'all', for backward compatibility
					case '':
					case 'all':
						break;

case 'comment':
					case 'comments':
						$comment_types[ $operator ][] = "''";
						break;

case 'pings':
						$comment_types[ $operator ][] = "'pingback'";
						$comment_types[ $operator ][] = "'trackback'";
						break;

default:
						$comment_types[ $operator ][] = $wpdb->prepare( '%s', $type );
						break;
				}
			}

if ( ! empty( $comment_types[ $operator ] ) ) {
				$types_sql = implode( ', ', $comment_types[ $operator ] );
				$this->sql_clauses['where'][ 'comment_type__' . strtolower( str_replace( ' ', '_', $operator ) ) ] = "comment_type $operator ($types_sql)";
			}
		}

$parent = $this->query_vars['parent'];
		if ( $this->query_vars['hierarchical'] && ! $parent ) {
			$parent = 0;
		}

if ( '' !== $parent ) {
			$this->sql_clauses['where']['parent'] = $wpdb->prepare( 'comment_parent = %d', $parent );
		}

if ( is_array( $this->query_vars['user_id'] ) ) {
			$this->sql_clauses['where']['user_id'] = 'user_id IN (' . implode( ',', array_map( 'absint', $this->query_vars['user_id'] ) ) . ')';
		} elseif ( '' !== $this->query_vars['user_id'] ) {
			$this->sql_clauses['where']['user_id'] = $wpdb->prepare( 'user_id = %d', $this->query_vars['user_id'] );
		}

// Falsy search strings are ignored.
		if ( strlen( $this->query_vars['search'] ) ) {
			$search_sql = $this->get_search_sql(
				$this->query_vars['search'],
				array( 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_author_IP', 'comment_content' )
			);

// Strip leading 'AND'.
			$this->sql_clauses['where']['search'] = preg_replace( '/^\s*AND\s*/', '', $search_sql );
		}

// If any post-related query vars are passed, join the posts table.
		$join_posts_table = false;
		$plucked          = wp_array_slice_assoc( $this->query_vars, array( 'post_author', 'post_name', 'post_parent' ) );
		$post_fields      = array_filter( $plucked );

if ( ! empty( $post_fields ) ) {
			$join_posts_table = true;
			foreach ( $post_fields as $field_name => $field_value ) {
				// $field_value may be an array.
				$esses                                     = array_fill( 0, count( (array) $field_value ), '%s' );
				$this->sql_clauses['where'][ $field_name ] = $wpdb->prepare( " {$wpdb->posts}.{$field_name} IN (" . implode( ',', $esses ) . ')', $field_value );
			}
		}

// 'post_status' and 'post_type' are handled separately, due to the specialized behavior of 'any'.
		foreach ( array( 'post_status', 'post_type' ) as $field_name ) {
			$q_values = array();
			if ( ! empty( $this->query_vars[ $field_name ] ) ) {
				$q_values = $this->query_vars[ $field_name ];
				if ( ! is_array( $q_values ) ) {
					$q_values = explode( ',', $q_values );
				}

// 'any' will cause the query var to be ignored.
				if ( in_array( 'any', $q_values, true ) || empty( $q_values ) ) {
					continue;
				}

$join_posts_table = true;

$esses                                     = array_fill( 0, count( $q_values ), '%s' );
				$this->sql_clauses['where'][ $field_name ] = $wpdb->prepare( " {$wpdb->posts}.{$field_name} IN (" . implode( ',', $esses ) . ')', $q_values );
			}
		}

// Comment author IDs for an IN clause.
		if ( ! empty( $this->query_vars['author__in'] ) ) {
			$this->sql_clauses['where']['author__in'] = 'user_id IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['author__in'] ) ) . ' )';
		}

// Comment author IDs for a NOT IN clause.
		if ( ! empty( $this->query_vars['author__not_in'] ) ) {
			$this->sql_clauses['where']['author__not_in'] = 'user_id NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['author__not_in'] ) ) . ' )';
		}

// Post author IDs for an IN clause.
		if ( ! empty( $this->query_vars['post_author__in'] ) ) {
			$join_posts_table                              = true;
			$this->sql_clauses['where']['post_author__in'] = 'post_author IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['post_author__in'] ) ) . ' )';
		}

// Post author IDs for a NOT IN clause.
		if ( ! empty( $this->query_vars['post_author__not_in'] ) ) {
			$join_posts_table                                  = true;
			$this->sql_clauses['where']['post_author__not_in'] = 'post_author NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['post_author__not_in'] ) ) . ' )';
		}

$join    = '';
		$groupby = '';

if ( $join_posts_table ) {
			$join .= "JOIN $wpdb->posts ON $wpdb->posts.ID = $wpdb->comments.comment_post_ID";
		}

if ( ! empty( $this->meta_query_clauses ) ) {
			$join .= $this->meta_query_clauses['join'];

// Strip leading 'AND'.
			$this->sql_clauses['where']['meta_query'] = preg_replace( '/^\s*AND\s*/', '', $this->meta_query_clauses['where'] );

if ( ! $this->query_vars['count'] ) {
				$groupby = "{$wpdb->comments}.comment_ID";
			}
		}

if ( ! empty( $this->query_vars['date_query'] ) && is_array( $this->query_vars['date_query'] ) ) {
			$this->date_query                         = new WP_Date_Query( $this->query_vars['date_query'], 'comment_date' );
			$this->sql_clauses['where']['date_query'] = preg_replace( '/^\s*AND\s*/', '', $this->date_query->get_sql() );
		}

$where = implode( ' AND ', $this->sql_clauses['where'] );

$pieces = array( 'fields', 'join', 'where', 'orderby', 'limits', 'groupby' );
		/**
		 * Filters the comment query clauses.
		 *
		 * @since 3.1.0
		 *
		 * @param string[]         $pieces An associative array of comment query clauses.
		 * @param WP_Comment_Query $this   Current instance of WP_Comment_Query (passed by reference).
		 */
		$clauses = apply_filters_ref_array( 'comments_clauses', array( compact( $pieces ), &$this ) );

$fields  = isset( $clauses['fields'] ) ? $clauses['fields'] : '';
		$join    = isset( $clauses['join'] ) ? $clauses['join'] : '';
		$where   = isset( $clauses['where'] ) ? $clauses['where'] : '';
		$orderby = isset( $clauses['orderby'] ) ? $clauses['orderby'] : '';
		$limits  = isset( $clauses['limits'] ) ? $clauses['limits'] : '';
		$groupby = isset( $clauses['groupby'] ) ? $clauses['groupby'] : '';

$this->filtered_where_clause = $where;

if ( $where ) {
			$where = 'WHERE ' . $where;
		}

if ( $groupby ) {
			$groupby = 'GROUP BY ' . $groupby;
		}

if ( $orderby ) {
			$orderby = "ORDER BY $orderby";
		}

$found_rows = '';
		if ( ! $this->query_vars['no_found_rows'] ) {
			$found_rows = 'SQL_CALC_FOUND_ROWS';
		}

$this->sql_clauses['select']  = "SELECT $found_rows $fields";
		$this->sql_clauses['from']    = "FROM $wpdb->comments $join";
		$this->sql_clauses['groupby'] = $groupby;
		$this->sql_clauses['orderby'] = $orderby;
		$this->sql_clauses['limits']  = $limits;

$this->request = "{$this->sql_clauses['select']} {$this->sql_clauses['from']} {$where} {$this->sql_clauses['groupby']} {$this->sql_clauses['orderby']} {$this->sql_clauses['limits']}";

if ( $this->query_vars['count'] ) {
			return intval( $wpdb->get_var( $this->request ) );
		} else {
			$comment_ids = $wpdb->get_col( $this->request );
			return array_map( 'intval', $comment_ids );
		}
	}

/**
	 * Populates found_comments and max_num_pages properties for the current
	 * query if the limit clause was used.
	 *
	 * @since 4.6.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 */
	private function set_found_comments() {
		global $wpdb;

if ( $this->query_vars['number'] && ! $this->query_vars['no_found_rows'] ) {
			/**
			 * Filters the query used to retrieve found comment count.
			 *
			 * @since 4.4.0
			 *
			 * @param string           $found_comments_query SQL query. Default 'SELECT FOUND_ROWS()'.
			 * @param WP_Comment_Query $comment_query        The `WP_Comment_Query` instance.
			 */
			$found_comments_query = apply_filters( 'found_comments_query', 'SELECT FOUND_ROWS()', $this );

$this->found_comments = (int) $wpdb->get_var( $found_comments_query );
		}
	}

/**
	 * Fetch descendants for located comments.
	 *
	 * Instead of calling `get_children()` separately on each child comment, we do a single set of queries to fetch
	 * the descendant trees for all matched top-level comments.
	 *
	 * @since 4.4.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * @param WP_Comment[] $comments Array of top-level comments whose descendants should be filled in.
	 * @return array
	 */
	protected function fill_descendants( $comments ) {
		global $wpdb;

$levels = array(
			0 => wp_list_pluck( $comments, 'comment_ID' ),
		);

$key          = md5( serialize( wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) ) ) );
		$last_changed = wp_cache_get_last_changed( 'comment' );

// Fetch an entire level of the descendant tree at a time.
		$level        = 0;
		$exclude_keys = array( 'parent', 'parent__in', 'parent__not_in' );
		do {
			// Parent-child relationships may be cached. Only query for those that are not.
			$child_ids   = $uncached_parent_ids = array();
			$_parent_ids = $levels[ $level ];
			foreach ( $_parent_ids as $parent_id ) {
				$cache_key        = "get_comment_child_ids:$parent_id:$key:$last_changed";
				$parent_child_ids = wp_cache_get( $cache_key, 'comment' );
				if ( false !== $parent_child_ids ) {
					$child_ids = array_merge( $child_ids, $parent_child_ids );
				} else {
					$uncached_parent_ids[] = $parent_id;
				}
			}

if ( $uncached_parent_ids ) {
				// Fetch this level of comments.
				$parent_query_args = $this->query_vars;
				foreach ( $exclude_keys as $exclude_key ) {
					$parent_query_args[ $exclude_key ] = '';
				}
				$parent_query_args['parent__in']    = $uncached_parent_ids;
				$parent_query_args['no_found_rows'] = true;
				$parent_query_args['hierarchical']  = false;
				$parent_query_args['offset']        = 0;
				$parent_query_args['number']        = 0;

$level_comments = get_comments( $parent_query_args );

// Cache parent-child relationships.
				$parent_map = array_fill_keys( $uncached_parent_ids, array() );
				foreach ( $level_comments as $level_comment ) {
					$parent_map[ $level_comment->comment_parent ][] = $level_comment->comment_ID;
					$child_ids[]                                    = $level_comment->comment_ID;
				}

foreach ( $parent_map as $parent_id => $children ) {
					$cache_key = "get_comment_child_ids:$parent_id:$key:$last_changed";
					wp_cache_set( $cache_key, $children, 'comment' );
				}
			}

$level++;
			$levels[ $level ] = $child_ids;
		} while ( $child_ids );

// Prime comment caches for non-top-level comments.
		$descendant_ids = array();
		for ( $i = 1, $c = count( $levels ); $i < $c; $i++ ) {
			$descendant_ids = array_merge( $descendant_ids, $levels[ $i ] );
		}

_prime_comment_caches( $descendant_ids, $this->query_vars['update_comment_meta_cache'] );

// Assemble a flat array of all comments + descendants.
		$all_comments = $comments;
		foreach ( $descendant_ids as $descendant_id ) {
			$all_comments[] = get_comment( $descendant_id );
		}

// If a threaded representation was requested, build the tree.
		if ( 'threaded' === $this->query_vars['hierarchical'] ) {
			$threaded_comments = $ref = array();
			foreach ( $all_comments as $k => $c ) {
				$_c = get_comment( $c->comment_ID );

// If the comment isn't in the reference array, it goes in the top level of the thread.
				if ( ! isset( $ref[ $c->comment_parent ] ) ) {
					$threaded_comments[ $_c->comment_ID ] = $_c;
					$ref[ $_c->comment_ID ]               = $threaded_comments[ $_c->comment_ID ];

// Otherwise, set it as a child of its parent.
				} else {

$ref[ $_c->comment_parent ]->add_child( $_c );
					$ref[ $_c->comment_ID ] = $ref[ $_c->comment_parent ]->get_child( $_c->comment_ID );
				}
			}

// Set the 'populated_children' flag, to ensure additional database queries aren't run.
			foreach ( $ref as $_ref ) {
				$_ref->populated_children( true );
			}

$comments = $threaded_comments;
		} else {
			$comments = $all_comments;
		}

return $comments;
	}

/**
	 * Used internally to generate an SQL string for searching across multiple columns
	 *
	 * @since 3.1.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * @param string $string
	 * @param array $cols
	 * @return string
	 */
	protected function get_search_sql( $string, $cols ) {
		global $wpdb;

$like = '%' . $wpdb->esc_like( $string ) . '%';

$searches = array();
		foreach ( $cols as $col ) {
			$searches[] = $wpdb->prepare( "$col LIKE %s", $like );
		}

return ' AND (' . implode( ' OR ', $searches ) . ')';
	}

/**
	 * Parse and sanitize 'orderby' keys passed to the comment query.
	 *
	 * @since 4.2.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * @param string $orderby Alias for the field to order by.
	 * @return string|false Value to used in the ORDER clause. False otherwise.
	 */
	protected function parse_orderby( $orderby ) {
		global $wpdb;

$allowed_keys = array(
			'comment_agent',
			'comment_approved',
			'comment_author',
			'comment_author_email',
			'comment_author_IP',
			'comment_author_url',
			'comment_content',
			'comment_date',
			'comment_date_gmt',
			'comment_ID',
			'comment_karma',
			'comment_parent',
			'comment_post_ID',
			'comment_type',
			'user_id',
		);

if ( ! empty( $this->query_vars['meta_key'] ) ) {
			$allowed_keys[] = $this->query_vars['meta_key'];
			$allowed_keys[] = 'meta_value';
			$allowed_keys[] = 'meta_value_num';
		}

$meta_query_clauses = $this->meta_query->get_clauses();
		if ( $meta_query_clauses ) {
			$allowed_keys = array_merge( $allowed_keys, array_keys( $meta_query_clauses ) );
		}

$parsed = false;
		if ( $orderby == $this->query_vars['meta_key'] || $orderby == 'meta_value' ) {
			$parsed = "$wpdb->commentmeta.meta_value";
		} elseif ( $orderby == 'meta_value_num' ) {
			$parsed = "$wpdb->commentmeta.meta_value+0";
		} elseif ( $orderby == 'comment__in' ) {
			$comment__in = implode( ',', array_map( 'absint', $this->query_vars['comment__in'] ) );
			$parsed      = "FIELD( {$wpdb->comments}.comment_ID, $comment__in )";
		} elseif ( in_array( $orderby, $allowed_keys ) ) {

if ( isset( $meta_query_clauses[ $orderby ] ) ) {
				$meta_clause = $meta_query_clauses[ $orderby ];
				$parsed      = sprintf( 'CAST(%s.meta_value AS %s)', esc_sql( $meta_clause['alias'] ), esc_sql( $meta_clause['cast'] ) );
			} else {
				$parsed = "$wpdb->comments.$orderby";
			}
		}

return $parsed;
	}

/**
	 * Parse an 'order' query variable and cast it to ASC or DESC as necessary.
	 *
	 * @since 4.2.0
	 *
	 * @param string $order The 'order' query variable.
	 * @return string The sanitized 'order' query variable.
	 */
	protected function parse_order( $order ) {
		if ( ! is_string( $order ) || empty( $order ) ) {
			return 'DESC';
		}

if ( 'ASC' === strtoupper( $order ) ) {
			return 'ASC';
		} else {
			return 'DESC';
		}
	}
}

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