检测连接

 1 <?php
 2 
 3 /**
 4  * 检查在执行页面是否存在本站链接
 5  * @param string $reurl
 6  * @return boolean
 7  */
 8 function check_url(array $arr){
 9     $siteUrl = "http://www.haojumei.com";
10     $reurlArr = parse_url($arr['reurl']);
11     $urlArr = parse_url($arr['url']);
12     $found = false;
13     if($reurlArr['host'] == $urlArr['host']){
14         $html = file_get_contents ( $arr['reurl'] );
15         $html = strtolower ( $html );
16         $site_url = strtolower ( $siteUrl );
17         if (preg_match_all ( '/<a\s[^>]*href=([\"\']??)([^" >]*?)\\1([^>]*)>/siU', $html, $matches, PREG_SET_ORDER )) {
18             foreach ( $matches as $match ) {
19                 if ($match [2] == $siteUrl || $match [2] == $siteUrl . '/') {
20                     $found = true;
21                     break;
22                 }
23             }
24         }
25     }
26     return $found;
27 }