php筛选不存在的图片资源

<?php
$url = 'https://.jb51./images/test.jpg';

if( @fopen( $url, 'r' ) ) 
{ 
 echo 'File Exits';
} 
else 
{
 echo 'File Do Not Exits';
}
?>

方法二

/ 
    筛选不存在的图片资源 
    
    @author wanggeng <wanggeng123@.qq.> 
    @return vodi 
   / 
   
  private static function _checkAll($url) 
  {  
    $curl = curl_init($url); 
    curl_set($curl, CURLOPT_NOBODY, true); 
    $result = false; 
    $res = curl_exec($curl); 
    if ($res !== false){ 
      $statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE); 
      if($statusCode == 200) { 
        $result = true; 
      } 
    } 
    curl_close($curl); 
    return $result; 
  } 

<?php
$url2 = 'https://.jb51./test.jpg';

$ch = curl_init();
$timeout = 10;
curl_set ($ch, CURLOPT_URL, $url2);
curl_set($ch, CURLOPT_HEADER, 1);
curl_set ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_set ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);

$contents = curl_exec($ch);
//echo $contents;
if (preg_match("/404/", $contents)){
 echo '文件不存在';
}
?>

HTTP/1.1 404 Not Found
Date: Tue, 14 Feb 2012 05:08:34 GMT
Server: Apache
Aept-Ranges: bytes
Content-Length: 354
Content-Type: text/html