PHP determines whether a network file exists

[PHP] code

$file = "http://www.xxx.nxxxet/demo/file_exists.zip";
$fileExists = @file_get_contents($file,null,null,-1,1) ? true : false ;

if($fileExists){
 echo "File Exists!";
}else{
 echo "Sorry, we couldn't find the file.";
}

Does it exist, PHP