ID: 23747 Comment by: free_2_cheat1990 at yahoo dot com Reported By: rryda at mgedata dot cz Status: Bogus Bug Type: Documentation problem Operating System: Windows 2000 PHP Version: 4.3.2RC4 New Comment:
i made a script to add dots to an image and if you run it to many times you also get the error "Fatal error: imagecreatefrompng(): gd-png: fatal libpng error: IDAT: CRC" i run mandrake linux 9.2 apache 2 php 4.3.3 gdlib 2 Previous Comments: ------------------------------------------------------------------------ [2004-04-03 11:02:55] [EMAIL PROTECTED] Sorry, but your problem does not imply a bug in PHP itself. For a list of more appropriate places to ask for help using PHP, please visit http://www.php.net/support.php as this bug system is not the appropriate forum for asking support questions. Thank you for your interest in PHP. ------------------------------------------------------------------------ [2003-08-29 09:45:34] simon at simonwheatley dot co dot uk I have also intermittently encountered this error. Running PHP on Xcalibre.co.uk http://daffy.xcalibre.co.uk/phpinfo.php I believe they run Slackware. My images were created by the imagepng() and are edited by php only. My first thought was that two instances of the script were accessing the same image? ------------------------------------------------------------------------ [2003-05-23 06:52:52] [EMAIL PROTECTED] of course, the copy() version should look like this: <?php $local = tempnam("", "gd"); copy("http://";, $local); ?> otherwise you don't know where you copied it to... ------------------------------------------------------------------------ [2003-05-23 06:49:59] [EMAIL PROTECTED] Not really a bug; fread() will now (correctly!) return data in packet sized chunks when reading from network streams, as it did in PHP 4.2.x and earlier. Technically, your script is broken; you should either do this: <?php $data = ""; $fp = fopen("http://....";); do { $chunk = fread($fp, 8192); if (strlen($chunk) == 0) { break; } $data .= $chunk; } while (true); fclose($fp); ?> this: <?php $data = file_get_contents("http://...";); ?> or this: <?php copy("http://...";, tempnam("", "gd")); ?> I'm making this a documentation problem, because the fread() manual page has never mentioned this fact, despite it being the behaviour since forever. One final note; the file_get_contents() and copy() functions were themselves suffering from a similar problem to that of your script; I've committed a fix to CVS, so you need to either use the fread() loop approach, or get the next stable snapshot (due in an hour or so). ------------------------------------------------------------------------ [2003-05-22 08:13:07] [EMAIL PROTECTED] It just looks like your image is broken, can you put up a runnable script + image in a tarball (or send it to me by mail) to verify? Derick ------------------------------------------------------------------------ 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/23747 -- Edit this bug report at http://bugs.php.net/?id=23747&edit=1
