让Emlog评论支持UBB代码

<?php
/**
* 评论多功能UBB
* @param  [type] $comment [description]
* @return [type]          [description]
*/
function contentUBB($comment){
        return $comment = preg_replace(
                array(
                        '/\[b\](.*?)\[\/b\]/is',
                        '/\[i\](.*?)\[\/i\]/is',
                        '/\[u\](.*?)\[\/u\]/is',
                        '/\[del\](.*?)\[\/del\]/is',
                        '/\[color=([\w|#]*?)\](.*?)\[\/color\]/is',
                        '/\[url=([^\"\']+)\](.*?)\[\/url\]/is',
                        '/\[img\]([^\"\'\]\[]+)\[\/img\]/is'
                ),
                array(
                        '<b class="comment-t-b">$1</b>',
                        '<i class="comment-t-i">$1</i>',
                        '<u class="comment-t-u">$1</u>',
                        '<del class="comment-t-del">$1</del>',
                        '<span style="color: $1" class="comment-t-color">$2</span>',
                        '<a href="go.php?url=$1" target="_blank" class="comment-t-a links" rel="nofollow noopener">$2</a>',
                        '<a href="$1" target="_blank" title="$1" class="comment-img"><i class="fa fa-file-image-o"></i> 查看图片</a>'
                ),
                $comment
        );
}
?>