getimagesize()

Can you call getimagesize() multiple times in one script? I'm trying to use it multiple times but it only seems to work in the first loop I call it in. I read something in the docs about it cacheing the results and didn't know if this has something to do with it. I also tried creating an array out of the results I get from it but it will only output the size values when it's building the array, never when I try to loop back through it and output the values. Thanks, Ed