how t check if file exists on a website?

Question

what is the php code or function to check if any perticular file exists on a website or not

eg.

http://mysite.com/my_image.gif
if this image present then return yes otherwise return no

I am using PHP Version 4.3.10 and file_exists function can not be used with URL wrappers.

Answer 1

This will search for the file. If the file does not exist, you will get a 404 header so that is how it works out if the file exists or not:

$file = 'http://mysite.com/my_image.gif';
$file_headers = @get_headers($file);
if($file_headers[0] == 'HTTP/1.1 404 Not Found') {
$exists = false;
}
else {
$exists = true;
}

Answer 2

That will be
file_exists("test.txt");