replace @name with link to comment

gistfile1.php

<?php

public function filter_comment_content_out($content, $comment) {
        if (!preg_match_all('#(@[0-9a-zA-Z_]+)\b#i', $content, $matches, PREG_SET_ORDER)) {
            return $content;
        }
        $id = null;

    foreach ( $matches as $m ) {
        foreach($comment->post->comments as $com) {
            if ($com->id < $comment->id && $com->name == substr($m[1], 1)) {
                $id = $com->id;
            }
        }
        $content = $id ? str_replace($m[1], '<a href="#comment-'.$id.'">'.$m[1].'</a>', $content) : $content;
        $id = null;
    }
    return $content;
}