PHP源码批量抓取远程网页图片并保存到本地的实现方法

获取一个网页内的远程图片，并自动保存到本地。

<?php
 header("Content-Type: text/html; charset=utf-8");
    error_reporting(E_ERROR|E_WARNING);
 //全局配置
 $fromFile = "aaa.css";  //要抓取的文件
 $savePath = "ttttttttt";  //保存路径
 $fromDomain = "http://www.xxx.com/"; //要抓取的域名
 //读取css样式并且分离出所有image的url
 $str = file_get_contents($fromFile);
 $strArr = explode("url(",$str); 
 $i = 0;
 foreach($strArr as $val){
 $val1 = explode(")",$val);
 if(strpos($val1[0],'jpg')||strpos($val1[0],'png')||strpos($val1[0],'gif'))
 $imgUrl[$i++] = $val1[0];
 }
    //PS:上面可以用正则的，但是我觉得这样也不错
 //开始抓取
 foreach($imgUrl as $url){
 if($url=="") continue;
 $filename = $savePath.$url;
 $url = $fromDomain.$url;
 getImage($url,$filename);
 }
 function getImage($url,$filename){
 ob_start();
 $context = stream_context_create(
       array (
     'http' => array (
      'follow_location' => false // don't follow redirects
      )
     )
 );
 //请确保php.ini中的fopen wrappers已经激活
 readfile( $url,false,$context);
 $img = ob_get_contents();
        ob_end_clean();
 $fp2 = @fopen($filename,"a");
 fwrite($fp2,$img);
 fclose($fp2);
 echo $filename." ok √";
 }
?>