PHP 4.0 Bug #4597: GetImageSize fails under certain gif's

From: ralph@ceenet.com Operating system: Slackware Linux 7.0 PHP version: 4.0.0 Release PHP Bug Type: Misbehaving function Bug description: GetImageSize fails under certain gif's Hi, I think GetImageSize is having problems with certain sized gifs, If you examine the following code, it attempts to get size information from one of the php logos from the php site and fails. I downloaded big-logo1t.gif and converted it to a .png and it works fine. I've had this happen with my own gif files as well, not all of them, just some. This has only been tested on PHP 4.0 Release <? #This one works. $Banner_URL = "http://www.arcademachine.com/banners/big-logo1t.png"; #This one will work also #$Banner_URL = "http://www.arcademachine.com/banners/bb.gif"; #Uncomment to try this one that fails. #$Banner_URL = "http://www.php.net/logos/big-logo1t.gif"; $Image_Type = array("NULL","GIF","JPG","PNG"); error_reporting(8); global $php_errormsg; if($fp = fopen($Banner_URL, "r")) { $banner = fread( $fp, 1000000 ); $Banner_Temp=uniqid("x"); $fd=fopen($Banner_Temp,"w+"); fwrite($fd,$banner); $var_size = GetImageSize($Banner_Temp); $var_Temp = $var_size[2]; $Banner_Type = $Image_Type[$var_Temp]; $Banner_Width = $var_size[0]; $Banner_Height = $var_size[1]; $file_size = filesize($Banner_Temp); $file_size = round($file_size / 1024 * 100) / 100 . "k"; $Banner_Size = $Banner_Width . "x" . $Banner_Height . " $file_size"; fclose($fd); fclose($fp); unlink($Banner_Temp); print("$Banner_URL<br>"); print("$Banner_Temp<br>"); print("$var_size<br>"); print("$Banner_Type<br>"); print("$Banner_Width<br>"); print("$Banner_Height<br>"); print("$file_size<br>"); print("<br>Last Error = $php_errormsg"); } ?>