求一正则表达式，请入

Question

这是我在 .NET 下写的正则表达式，如下"href=(?<web_url>[\s\S]*?)>|href=""(?<web_url>[\s\S]*?)""|href='(?<web_url>[\s\S]*?)'"目的就是要得到，一个指定 URl （如：http://shop.ebay.com/merchant/aboutsales）中所有连接信息，在.NET运用该正则表达式，可得到如下类似的Url/merchant/aboutsales_W0QQQ5ftrkparmsZ72Q253A1205Q257C66Q253A2Q257C65Q253A12Q257C39Q253A1QQ_trksidZp3911Q2ec0Q2em14?_pgn=3
/merchant/aboutsales_W0QQQ5ftrkparmsZ72Q253A1205Q257C66Q253A2Q257C65Q253A12Q257C39Q253A1QQ_trksidZp3911Q2ec0Q2em14?_pgn=4
http://cgi.ebay.com/Tory-Burch-Ella-Coconut-Blue-Wedge-Peep-Toe-Shoes-6-5-M_W0QQitemZ270342109810QQcmdZViewItemQQptZUS_Women_s_Shoes?hash=item3ef1a53a72&amp;_trksid=p3911.c0.m14&amp;_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A0%7C293%3A1%7C294%3A50
http://jewelry.shop.ebay.com/items/Jewelry-Watches__W0QQ_catrefZ1QQ_flnZ1QQ_sacatZ281QQ_ssnZaboutsalesQQ_trksidZp3911Q2ec0Q2em282
http://cgi.ebay.com/New-Auth-Kate-Spade-Harwyn-Sm-Maya-Leopard-Purse-Bag_W0QQitemZ270279913443QQcmdZViewItemQQptZUS_CSA_WH_Handbags?hash=item3eedf02fe3&amp;_trksid=p3911.c0.m14&amp;_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50
现在这个正则表达式在 PHP 中通不过
望高人帮忙修改下，或指点下

Answer 1

<?php
$gethtml=file_get_contents ("http://shop.ebay.com/merchant/aboutsales");
$pat ="href=(?<web_url>[\s\S]*?)>|href=""(?<web_url>[\s\S]*?)""|href='(?<web_url>[\s\S]*?)'";
preg_match_all($pat,$gethtml,$array);
foreach ($array[0] as $u)
{ 
$url = $u; 
echo trim($u)."<br>";
}
?>
在 PHP 中错误提示为 Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING

Answer 2

$pat ="/href=(?<web_url>[\s\S]*?)>|href=""(?<web_url>[\s\S]*?)""|href='(?<web_url>[\s\S]*?)'/";

Answer 3

谢谢二楼的
不行
出错提示为： 
 syntax error, unexpected T_CONSTANT_ENCAPSED_STRING 

Answer 4

<?php
$gethtml=file_get_contents ("http://shop.ebay.com/merchant/aboutsales");
$pat ="/href=(\w+[\s\S]*)|href=\"(\w+[\s\S]*)\"|href=\'(\w+[\s\S]*?)\'/U";preg_match_all($pat,$gethtml,$array,PREG_PATTERN_ORDER);
foreach ($array[0] as $u)
{ 
$url = $u; 
echo trim($u)."<br>\n";
}
?>