I receive the warning when run the script from localhost (WAMP):
Warning: getimagesize(image url) [function.getimagesize]: failed to open stream: A system call that should never fail has failed.
Where is the problem?
Sounds like the path to the file is wrong. but you hid that from us 😛
There is no differences about URL, it can be for example http://www.phpbuilder.com/images/logo.gif - returns the same warning.