#25331 [Fbk->Opn]: imagecreatefromstring() makes an error with some strings

ID: 25331 User updated by: hgshoggins at yahoo dot fr Reported By: hgshoggins at yahoo dot fr -Status: Feedback +Status: Open Bug Type: GD related Operating System: Linux web23.90.ha.ovh.net 2.4.20 PHP Version: 4.3.2 New Comment: Thanks Alot! I'll try to make them do this... Hoggins Previous Comments: ------------------------------------------------------------------------ [2003-08-31 13:03:54] derick@php.net Your ISP should really use the bundled version which is much more stable then the external library. If it works for you with the bundled library, then it's not a problem with PHP most likely. So you'll have to ask them to recompile PHP and use the bundled GD library. Derick ------------------------------------------------------------------------ [2003-08-31 12:53:36] hgshoggins at yahoo dot fr Description: ------------ hi, using a mysql db, and jpeg images strings in BLOB fields. All the images are readable on a computer through any image editor. But imagecreatefromstring() doesn't recognize some of them as valid jpeg strings, (it returns the classic error message "not a valid image string") and I couldn't be able to find the commom criteria of these images. The script is located on a server I do not own, and the admin says it's my script's fault. Some images work, and some not. The problem appeared since they went up to GD2. I'm only a PHP *USER*, so I do not use, and do not understand the compiling options, but I use the bundled gd2 library by uncommenting the line: "extension=php_gd2.dll". I test my scripts on a WinXP machine with Apache 2.0.45, and it perfectly works. I figured that, even if both my ISP and I are using GD2, it doesn't display the same way in phpinfo(): mine appears "bundled", and the ISP's doesn't. So I think the imagecreatefromstring() function doesn't accept some strings any more, which the previous version did on my ISP' servers. I hope that all the infos I provided will help you to solve the problem, which I'm sure doesn't come from me. Reproduce code: --------------- I just call a <img src="script.php?id=[the id of the image in my database]"> The script "script.php": (which normally contains the database connection infos, and the connection opening function) $sql="SELECT * FROM image_db WHERE id='$img_id'"; $resultat=mysql_query($sql); $quality=100; $ligne=mysql_fetch_array($resultat); $data=$ligne["data"]; $im=imagecreatefromstring($data); $im=imagejpeg($im,"",$quality); imageinterlace($im,$interlace); imagedestroy($im); Expected result: ---------------- I whish it simply displayed *all* the images. It does for some, and doesn't for some others wich are -I think I repeat myself- perfectly readable otherwise. Actual result: -------------- Well, in fact it doesn't, and also displays an HTTP 500 Internal Server Error. I could get the error message only thanks to the admin, who tracked the error for me in a file. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=25331&edit=1