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Homephp教程PHP源码php 匹配url 正则表达式代码

这是个获取文章内容中所有链接的php正则表达式

<script>ec(2);</script>

$str ="";

 代码如下 复制代码
$reg = "[^"']*))|(?[^s>]+))[sS]*?>";

//下面这个实例是获取内容中域名正则表达式

 代码如下 复制代码
function get_domain($url){
  $pattern = "/[w-]+.(com|net|org|gov|cc|biz|info|cn)(.(cn|hk))*/";
  preg_match($pattern, $url, $matches);
  if(count($matches) > 0) {
   return $matches[0];
  }else{
   $rs = parse_url($url);
   $main_url = $rs["host"];
   if(!strcmp(long2ip(sprintf("%u",ip2long($main_url))),$main_url)) {
    return $main_url;
   }else{
    $arr = explode(".",$main_url);
    $count=count($arr);
    $endArr = array("com","net","org","3322");//com.cn  net.cn 等情况
    if (in_array($arr[$count-2],$endArr)){
     $domain = $arr[$count-3].".".$arr[$count-2].".".$arr[$count-1];
    }else{
     $domain =  $arr[$count-2].".".$arr[$count-1];
    }
    return $domain;
   }
  }
 }

 
 //实例
 
 $str ="jfkdlajfdafdjak;www.111cn.net";
 echo get_domain($str)
 
 //得出值为111cn.net
 

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