PHP if statement help

[meblake]

Okay, I have an if statement which works but isn't what I want yet.

<?php if (catch_that_image()) : ?>
<img src="/wp-content/themes/base/thumb.php?src=<?php echo catch_that_image() ?>&h=100&w=100&zc=1">
<?php endif; ?>

What I need to for the if statement to check if the catch_that_image is a local copy or not. At the moment I am having the issue where I get blank boxes because the thumb.php script can't do hot linked images, which I don't want it to do either. Anyway, I have tried preg_match and some others, but that didn't work at all. Any ideas?

Thanks.

 

[moondog]

check to see if the file exists locally with file_exists

$theImage = catch_that_image();
if(file_exists("/path/to/image/{$theImage}") {
  . . . print the image .. . 
}