PHP判断远程文件是否存在

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PHP判断远程文件是否存在

1. function FileExists($url){
   
2.     $ch = curl_init();
   
3.     $timeout = 10;
   
4.     curl_setopt ($ch, CURLOPT_URL, $url);
   
5.     curl_setopt($ch, CURLOPT_HEADER, 1);
   
6.     curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
   
7.     curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
   
8.     $contents = curl_exec($ch);
   
9.     if (preg_match("/404/", $contents)){
   
10.         echo '文件不存在';
    
11.     }
    
12. }

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