PHP判断网络文件是否存在

[PHP]代码

1. $file = "http://www.xxx.nxxxet/demo/file_exists.zip";
2. $fileExists = @file_get_contents($file,null,null,-1,1) ? true : false ;
4. if($fileExists){
5. echo "File Exists!";
6. }else{
7. echo "Sorry, we couldn't find the file.";
8. }