求好手,关于网址正提取则

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Release: 2016-06-13 12:36:47
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求高手,关于网址正提取则

本帖最后由 dz215136304 于 2013-09-10 14:52:56 编辑 需求:提取出字符串中的url

因为需要将提取出来的网址再次处理,所以放到回调函数里,但是同样的正则放在preg_match_all正常,而放到preg_replace_callback中就不起作用,一下代码是提取出sdfsd.qq.www.qq.com

<br />
<br />
$con='http://sdfsd.qq.www.qq.com/sdf.html?a=c';<br />
//preg_match_all('/([a-z1-9\.]+\.[com|cn|info]+)/is', $con, $arr);<br />
//print_r($arr);这里可以正常提取出sdfsd.qq.www.qq.com的网址<br />
<br />
<br />
$conn=preg_replace_callback('/([a-z1-9\.]+\.[com|cn|info|tk|us]+)/isum', 'url', $con);//同样的正则放到这里就提取不出sdfsd.qq.www.qq.com<br />
echo $conn; <br />
  <br />
function url($url){<br />
return $url[1];//不管这里是$url[0]还是$url[1]<br />
}<br />
<br />
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