#28375 [Opn->WFx]: getimagesize only checks global gif header

ID: 28375 Updated by: iliaa@php.net Reported By: scottmacvicar at ntlworld dot com -Status: Open +Status: Wont fix Bug Type: GetImageSize related Operating System: * PHP Version: 4CVS-2004-05-12 (stable) New Comment: Scanning the entire gif file would be too slow. It would also require the retrieval of the entire file rather then just the header, which would be rather slow if the file is located on a remote server. Previous Comments: ------------------------------------------------------------------------ [2004-05-12 19:01:15] scottmacvicar at ntlworld dot com Description: ------------ A getimagesize can return a wrong value if corruption or intentional editing has changed the values held in the global header for the gif. It is possible to find the correct value by scanning through each frame and looking at the local image descriptor values for width and height and returning the largest value. Both Mozilla and IE do this as standard and ignore the global height and width. If anyone wants a sample gif I can email them it. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=28375&edit=1