Image link verification

[Porl123]

Anybody know any functions or methods of verifying an image link? I've been using substr but there's been a few problems with that. Surely there's a more technical way where I can find the format. I've heard that you can use fopen but can't find how it works

 

Any help is appreciated thanks

[Maq]

Could you be more detailed on what you're trying to accomplish because there may be an easier solution.

[Porl123]

I've been trying to make a function where I have it check the provided link for the format

 

if(format == gif)

ok = true;

elseif(format == jpeg)

ok = true

else

ok = false

 

Something along those lines

[Porl123]

Really what I need is just a way to find out the format of an image so I can verify it. I can do the rest my self :] I'm just wondering which would be the best way to do it

[Porl123]

No ideas? =(

[DarkWater]

<?php
$string = "foobar.gif";
$ext = strrchr($string, '.');
echo $ext;
?>