<?php  
    //error_reporting(0);//关闭错误报告  
    include_once("simple_html_dom.php");//引入解析库  
    $url='http://www.w3cschool.cc/mongodb/mongodb-window-install.html';  
    $html=file_get_html($url);  
    while($url[strlen($url)-1]!='/')$url=substr($url,0,-1);//获得上层目录  
    if(!is_dir($filepath)){mkdir($_SERVER['DOCUMENT_ROOT']."/imgtmp/",1);}//创建目录  
    foreach($html->find('img') as $im)  
    {  
        $p=$im->src;  
        if($p[0]=='/'||$p[0]=='\\')$p=$url."..".$p;//补全url  
        file_put_contents("imgtmp/".md5(microtime()).".".substr($p,-3),file_get_contents($p));  
    }  
    ?>