PHP 富文本内容中图片路径追加域名

 public function mergeImageUrl($content)
 {
     $suffix = 'http://wwww.baidu.com/';
     $pregRule = "/<[img|IMG].*?src=[\'|\"](.*?(?:[\.jpg|\.jpeg|\.png|\.gif|\.bmp]))[\'|\"].*?[\/]?>/";
     $content = preg_replace($pregRule, '"' . $suffix . '${1}" style="max-width:100%">', $content);
     return $content;
}