songshujin

抓取到的内容在通过正则表达式做一下过滤就得到了你想要的内容,至于如何用正则表达式过滤,在这里就不做介绍了,有兴趣的,以下就是几种常用的用php抓取网页中的内容的方法。
1.file_get_contents 

<?php 
$url = "http://www.jb51.net"; 
$contents = file_get_contents($url); 
//如果出现中文乱码使用下面代码 
//$getcontent = iconv("gb2312", "utf-8",$contents); 
echo $contents; 
?> 

2.curl 

<?php 
$url = "http://www.jb51.net"; 
$ch = curl_init(); 
$timeout = 5; 
curl_setopt($ch, CURLOPT_URL, $url); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout); 
//在需要用户检测的网页里需要增加下面两行 
//curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY); 
//curl_setopt($ch, CURLOPT_USERPWD, US_NAME.":".US_PWD); 
$contents = curl_exec($ch); 
curl_close($ch); 
echo $contents; 
?> 

3.fopen->fread->fclose

<?php 
$handle = fopen ("http://www.jb51.net", "rb"); 
$contents = ""; 
do { 
$data = fread($handle, 1024); 
if (strlen($data) == 0) { 
break; 
} 
$contents .= $data; 
} while(true); 
fclose ($handle); 
echo $contents; 
?> 

 

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