Is there a way to test for a file?

Hi everyone, I'm a PHP newbie and wanted to know if there is a way to test for a file. The reason I'd like to do this is because I'm writing a query to return items from a catalog. However, if the client hasn't uploaded a picture or if the picture is misteriously missing from the image folder, instead of returning the product with the infamous missing jpeg picture, I would rather the product be skipped altogether. I'd like PHP to check to see if the image/picture.jpg exists before returning the picture. Is this possible? Thanks! Doug Coning American Web Studio www.americanwebstudio.com