关于正则，求高手帮助

如例:
http://bbs.csdn.net/topics/new?forum_id=PHP
http://www.bdyy.cc/detail/?20236.html
http://www.qq.com/html/?20236.html?id=88888

preg_match('/(http:\/\/)(.*)(\/)/',$rrr,$matches);

如何分别正则出:
bbs.csdn.net
www.bdyy.cc
www.qq.com

回复讨论(解决方案)

$s=<<<txthttp://bbs.csdn.net/topics/new?forum_id=PHPhttp://www.bdyy.cc/detail/?20236.htmlhttp://www.qq.com/html/?20236.html?id=88888txt;preg_match_all('/http:\/\/([^\/]+)\//s',$s,$matches);print_r($matches[1]);

Array
(
    [0] => bbs.csdn.net
    [1] => www.bdyy.cc
    [2] => www.qq.com
)

 preg_match('/http:\/\/([^\/]*)/i',$rrr,$matches);