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Edit File : xdiff.php \| Size : 2.15 KB
<?php /** * Class used internally by Diff to actually compute the diffs. * * This class uses the xdiff PECL package (http://pecl.php.net/package/xdiff) * to compute the differences between the two input arrays. * * Copyright 2004-2010 The Horde Project (http://www.horde.org/) * * See the enclosed file COPYING for license information (LGPL). If you did * not receive this file, see https://opensource.org/license/lgpl-2-1/. * * @author Jon Parise <jon@horde.org> * @package Text_Diff / class Text_Diff_Engine_xdiff { /* / function diff($from_lines, $to_lines) { array_walk($from_lines, array('Text_Diff', 'trimNewlines')); array_walk($to_lines, array('Text_Diff', 'trimNewlines')); / Convert the two input arrays into strings for xdiff processing. / $from_string = implode("\n", $from_lines); $to_string = implode("\n", $to_lines); / Diff the two strings and convert the result to an array. / $diff = xdiff_string_diff($from_string, $to_string, count($to_lines)); $diff = explode("\n", $diff); / Walk through the diff one line at a time. We build the $edits * array of diff operations by reading the first character of the * xdiff output (which is in the "unified diff" format). * * Note that we don't have enough information to detect "changed" * lines using this approach, so we can't add Text_Diff_Op_changed * instances to the $edits array. The result is still perfectly * valid, albeit a little less descriptive and efficient. */ $edits = array(); foreach ($diff as $line) { if (!strlen($line)) { continue; } switch ($line[0]) { case ' ': $edits[] = new Text_Diff_Op_copy(array(substr($line, 1))); break; case '+': $edits[] = new Text_Diff_Op_add(array(substr($line, 1))); break; case '-': $edits[] = new Text_Diff_Op_delete(array(substr($line, 1))); break; } } return $edits; } } Back

Edit File : xdiff.php | Size : 2.15 KB

<?php
/**
 * Class used internally by Diff to actually compute the diffs.
 *
 * This class uses the xdiff PECL package (http://pecl.php.net/package/xdiff)
 * to compute the differences between the two input arrays.
 *
 * Copyright 2004-2010 The Horde Project (http://www.horde.org/)
 *
 * See the enclosed file COPYING for license information (LGPL). If you did
 * not receive this file, see https://opensource.org/license/lgpl-2-1/.
 *
 * @author  Jon Parise <jon@horde.org>
 * @package Text_Diff
 */
class Text_Diff_Engine_xdiff {

/**
     */
    function diff($from_lines, $to_lines)
    {
        array_walk($from_lines, array('Text_Diff', 'trimNewlines'));
        array_walk($to_lines, array('Text_Diff', 'trimNewlines'));

/* Convert the two input arrays into strings for xdiff processing. */
        $from_string = implode("\n", $from_lines);
        $to_string = implode("\n", $to_lines);

/* Diff the two strings and convert the result to an array. */
        $diff = xdiff_string_diff($from_string, $to_string, count($to_lines));
        $diff = explode("\n", $diff);

/* Walk through the diff one line at a time.  We build the $edits
         * array of diff operations by reading the first character of the
         * xdiff output (which is in the "unified diff" format).
         *
         * Note that we don't have enough information to detect "changed"
         * lines using this approach, so we can't add Text_Diff_Op_changed
         * instances to the $edits array.  The result is still perfectly
         * valid, albeit a little less descriptive and efficient. */
        $edits = array();
        foreach ($diff as $line) {
            if (!strlen($line)) {
                continue;
            }
            switch ($line[0]) {
            case ' ':
                $edits[] = new Text_Diff_Op_copy(array(substr($line, 1)));
                break;

case '+':
                $edits[] = new Text_Diff_Op_add(array(substr($line, 1)));
                break;

case '-':
                $edits[] = new Text_Diff_Op_delete(array(substr($line, 1)));
                break;
            }
        }

return $edits;
    }

}

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