if(preg_match("/^\/(index|default)?\.?(asp|aspx|php|html|htm)?/iUs",$_SERVER['HTTP_X_REWRITE_URL'])){echo  "1";}else{echo  "2";}我这个正则写出来是错的,该怎么写,大家帮哈忙,我就想判断来路是不是/,/index.php,/index.html这些