#23056 [Bgs->Opn]: gif and jpeg php generated pictures bug

ID: 23056 User updated by: dan1 at edenpics dot com Reported By: dan1 at edenpics dot com -Status: Bogus +Status: Open Bug Type: Output Control Operating System: Linux RedHat 7.1 PHP Version: 4.3.2RC1 New Comment: Yes, the bird was in JPEG before, I changed it in GIF, to be more coherent with the code. It's because I tested several formats, sorry for this incovenience. However, the bug appears in GIF or JPEG, so the bug is the same now. I just found out that the bug comes out only if we sent the "Cache-Control" header along with the picture, which is something I forgot to mention in my previous code, because I thought that it was not relevant. In fact, THIS IS the problem. So here is the code that really generates the bug: <? header("Content-type: image/gif"); header("Cache-Control: no-cache, must-revalidate"); $output="bird.gif"; // file name $fd = fopen($output,"r"); $filelength=filesize($output); $contents = fread($fd,$filelength); echo $contents; fclose($fd); ?> If you comment out the Cache-Control header line, everything works fine, so this is a workaround. However, I think that it is still a PHP bug, don't you ? Please try again (1 minute), I updated the report page: http://www.edenpics.com/pub/iebug/iebug2.phtml Thank you. Previous Comments: ------------------------------------------------------------------------ [2003-04-05 11:13:29] sniper@php.net Disclaimer: the bird.gif _WAS_ jpeg before.. :) ------------------------------------------------------------------------ [2003-04-05 11:12:22] sniper@php.net the example bird.gif is actually JPEG, not GIF.. And when having the correct script with correct imagetype, this all works just fine. This is NOT any bug in PHP. ------------------------------------------------------------------------ [2003-04-05 00:28:33] rasmus@php.net I copied your script directly and found a bird.gif image out there. You can see the result at: http://lerdorf.com/bird.php Source code at: http://lerdorf.com/bird.phps Works ok for me. Perhaps you have something before or after the start/end php tags, or do you have weird line endings or something? Do an "od -c bird.php" and compare it to: http://lerdorf.com/bird.txt ------------------------------------------------------------------------ [2003-04-04 12:55:43] dan1 at edenpics dot com Something more: this happens with all versions of Internet Explorer ------------------------------------------------------------------------ [2003-04-04 12:21:28] dan1 at edenpics dot com Sorry, $output is the file name. here is the correct code: <? header("Content-type: image/gif"); $output="bird.gif"; // file name $fd = fopen($output,"r"); $filelength=filesize($output); $contents = fread($fd,$filelength); echo $contents; fclose($fd); ?> I tried PHP version 4.3.2RC1. The same happens. This bug appears with jpeg (.jpg) files too, with the "e99\r\n" code before the picture datas, and they can only be saved as BMP too. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/23056 -- Edit this bug report at http://bugs.php.net/?id=23056&edit=1