PHP checks if a file exists on a different domain name

PHP Check if the file exists under different domain names

Earlier today I needed to the find out if a file exists on a different domain. Initially I used the file_exists function, but then if that threw back a error I remembered that file_exists only check s whether a file or directory exists on the same server as the script.

After I played around with various functions, I came up with a few lines of code that actually works:

How to check if file exists on a different domain

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The logic explained

OK, so if the file exists (1.jpg) The fopen function would throw a "resource ID" response. So I check the response to see if "Response ID" exists with the Strpos function. It ' s really as simple as that.

I ' m not entirely sure if my method was the best, nor the most efficient, but it seems to work pretty well, and I can ' t thin K of any other methods. Anyone know of any other/better methods?

Better Solution

Thanks to a comment left by Paul I ' ve been made aware of a better solution.

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$url = "http://www.example.com/index.php"; $header _response = Get_headers ($url, 1); if (Strpos ($header _response[0], " 404 ")!== false) {  //file DOES not EXIST} else {  //file exists!!}

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