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
[解决办法]

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

Array
(
[0] => bbs.csdn.net
[1] => www.bdyy.cc
[2] => www.qq.com
)
[解决办法]
preg_match('/http:\/\/([^\/]*)/i',$rrr,$matches);