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php 怎么获取网页并且替换

WBOY
Release： 2016-06-13 12:55:41
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php 如何获取网页并且替换？
比如 我获取到了百度的源码
$url = "http://www.baidu.com"; 
$contents = file_get_contents($url); 
echo $contents; 
?> 


然后我想要的替换里面的连接
比如
href="http://baike.baidu.com" 把http://baike.baidu.com 替换成一个变量 然输出

类似与 href="$newurl"


------解决方案--------------------
$newurl='sohu.com';
echo preg_replace('/href="(.+?)"/i','href="'.$newurl.'"',$contents); 
Related labels：
href nbsp
source：php.cn
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