php匹配正则表达式

<?php
$content = "ad你好asd/dasds*@～as/d,.^asdasda.jpg,11/das，看看ds*～as/d.^asdasda.jpg,1&1/dd,s*～as/d,.^asda.png";
if(preg_match_all("/[^,][\w\W]+?.(jp