preg_match正则取值
preg_replace("/http:\/\/player\.youku\.com\/player\.php\/sid\/([\w=]{10,20})\/v\.swf/", "http://www.ooqiu.com/templets/youku/iframe.html#$1", $body);
后面用$1取值的部分，用()包裹起来才可以取到
preg_replace("/http:\/\/player\.youku\.com\/player\.php\/sid\/([\w=]{10,20})\/v\.swf/", "http://www.ooqiu.com/templets/youku/iframe.html#$1", $body);
后面用$1取值的部分，用()包裹起来才可以取到
