Checking if a file exists in PHP

[jtown]

I was wondering if there is a snippet of code that checks if an img file exists on a remote server? I tried fopen, but it doesn't seem to work right.

[_theworks]

[man]file_exists[/man]

<?

$filename = 'filename.txt';

if (!file_exists($filename)) {
  echo 'file does not exist!';
}else {
  echo 'file does exist!';
}

?>