无法获取超链接

$url="http://ca178.qjwm.com/";
$fp=@fopen($url,"r") or die("超时");
$fcontents=file_get_contents($url);
print_r($fcontents);
preg_match_all('/<a(.*?)href="(.*?)"(.*?)>.*邀请.*<\/a>/i', $fcontents, $matches);
print_r($matches);我想获取含有邀请关键词的链接，但是一直是空的，求指导url链接

解决方案 »

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<?php
$url="http://ca178.qjwm.com/";
$fp=@fopen($url,"r") or die("超时");
$fcontents=file_get_contents($url);
//print_r($fcontents);
//'/<a(.*?)href="(.*?)"(.*?)>.*邀请.*<\/a>/i'
$patten = "/<a.*?href=(['\"])(.*?)\\1.*?>.*?邀请.*?<\/a>/i";
preg_match_all($patten, $fcontents, $matches);
print_r($matches[2]);
fclose($fp);
?>
Array ( )
1楼的测试出来是这样的···貌似不行··我不明白为啥获取不了··哎
这样试试
'#<a.*href=[\'"](.*)[\'"].*>.*邀请.*</a>#is'
你的content内容是否有？
把一部份贴出来看看
content内容就是从url目标网址获取来的
print  content是看得到内容以及超链接的
把print的内容贴出来，
不要在论坛里帖url，这里没啥人会去看的。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">
<HTML xmlns="http://www.w3.org/1999/xhtml"><HEAD><TITLE>蜗牛|奔跑的蜗牛|奔跑的wō牛  ca178的网盘 - ca178.qjwm.com</TITLE>
<META content="text/html; charset=gb2312" http-equiv=Content-Type>
<META content=IE=7 http-equiv=X-UA-Compatible>
<META name=keywords content="蜗牛|奔跑的蜗牛|奔跑的wō牛  ca178的网盘">
<META name=description content="千军万马网盘为蜗牛|奔跑的蜗牛|奔跑的wō牛  ca178的网盘提供网盘空间">
<LINK rel=stylesheet type=text/css href="images/reset.css">
<LINK rel=stylesheet type=text/css href="images/sp.css">
<META name=GENERATOR content="MSHTML 9.00.8112.16437"></HEAD>
<BODY>
<script type="text/javascript" src="http://www.qjwm.com/qjwmtop0.js"></script>
<DIV id=main>
  <DIV style="width:960px; HEIGHT: 33px; margin-left:auto; margin-right:auto;margin-down:auto">
<DIV  id=topgg>
<DIV style="TEXT-ALIGN: right" id=topBanner>
<a href="http://www.qjwm.com/money.html" target="_blank"><img src="images/qjwm.gif" width="539" height="33"></a></DIV></DIV></DIV>
<DIV id=header>
<DIV id=logo><h2 style="width:430px;FLOAT: left;DISPLAY: block; overflow:hidden;white-space: nowrap;height:40px;line-height:40px">蜗牛|奔跑的蜗牛|奔跑的wō牛  ca178.qjwm.com</h2>
<DIV id=subsc>
<table width="100%" border="0" cellpadding="0" cellspacing="0">
<form method='post'id='forumEntrance' name='forumEntrance' action='http://www.qjwm.com/index.aspx' >
    <tr>
      <td width="142" align="left">账号: 
      <input name='username' type='text' id='username' maxlength='100' class='kuan3' /></td>
      <td width="237" align="center">密码：  <input name='password' type='password' id='password' maxlength='100' class='kuan3'/>
         <a href="http://www.qjwm.com/forgetpass.aspx" target="_blank">忘记密码？</a> </td>
      <td width="65" align="right" valign="middle"> <input type="image" src="images/login.gif" name='submit' value='登录' class='button' onclick='return chkLogin()' /> </td>
      <td width="76" align="right" valign="middle"><a href="http://www.qjwm.com/reg.html" target="_blank"><img src="images/zhuce.gif" width="51" height="22"></a></td>
      </tr>
      </FORM>
  </table>
</DIV>
</DIV>
<div class="clear"></div>
</DIV>
  <table width="960" border="0" cellspacing="0" cellpadding="0">
<tr>
    <td height="180">
<script type="text/javascript">/*qjwm yonghu*/ var cpro_id = 'u964695';</script>          <td valign="top" id=spcenter>
          <div class='filelist'>
<ul class='clear_u'><li class='filetype'><a href='/folder-0-e-a-1-ca178' title='点此可按类型排序'>类型</a></li><li class='filename'><a href='/folder-0-n-a-1-ca178' title='点此可按名称排序'>名称</a></li><li class='filesize'><a href='/folder-0-s-a-1-ca178' title='点此可按大小排序'>大小</a></li><li class='lastime'><a href='/folder-0-t-a-1-ca178' title='点此可按更新时间排序'>更新时间▼</a></li><li class='downcount'><a href='/folder-0-c-a-1-ca178' title='点此可按下载次数排序'>人气热度</a></li><li class='downurl'>复制地址</li></ul><ul class='clear_u'>
<li class='filetype'><img src='/pics/folder.gif' border='0'></li>
<li class='filename1' ><a href='/folder-6037221'>最新电影</a></li>
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Array
(
    [0] => Array
        (
        )    [1] => Array
        (
        ))
preg_match_all('#<a[^>]*href=[\'"]([^\'"]*)[\'"][^>]*>[^<]*邀请[^<]*</a>#isU', $str, $m);
print_r($m);
//Array ( [0] => Array ( [0] => 全能地盘小秘书+邀请小助手3.45.rar ) [1] => Array ( [0] => /down_6500284.html ) )
你的正则表达式有问题，
<a[^>]+>.*?邀请.*?<\/a>
这个可以获取从第一个<a>标签到邀请</a>标签的内容，刚学正则表达式不清楚如何让<a>匹配到邀请前面。
明白了，正则应该这样写
<a[^>]*>[^<]*邀请.*?</a>
可以结帖了，10楼的答案是正解！下面这个是我写的demo，正则匹配部分和10楼完全相同。$url="http://ca178.qjwm.com/";
$fp=@fopen($url,"r") or die("超时");
$fcontents=file_get_contents($url);
print_r($fcontents);
preg_match_all('#<a[^>]*href=[\'"]([^\'"]*)[\'"][^>]*>[^<]*邀请[^<]*</a>#isU', $fcontents, $matches);
print_r($matches);Array
(
    [0] => Array
        (
            [0] => <a href='/down_6500284.html' target='_blank'>全能地盘小秘书+邀请小助手3.45.rar</a>
        )    [1] => Array
        (
            [0] => /down_6500284.html
        ))