改成这样'/(src|width|height)=([\"|\'])?(.*?)(?(2)\2|\s)/is'上例子会明白的 $html = '';$search = '/(src|width|height)=([\"|\'])?(.*?)(?(2)\2|\s)/is';preg_match_all($search, $html , $r);echo '
';print_r($r);echo '
