Bug #77368 [NEW]: createimagefromgif() function don't work normaly

From: caovietlam at gmail dot com Operating system: Windows 10 Pro 64 bit PHP version: 5.6.39 Package: GD related Bug Type: Bug Bug description:createimagefromgif() function don't work normaly Description: ------------ The source file 'anh.gif' is viewing normally in any photo viewer. The destination files look so different with source file. Still appear when test with PHP 7.3.0. Test script: --------------- <?php // Load image from test file $im = imagecreatefromgif('anh.gif'); // Save to anothers format imagegif($im, 'test.gif'); imagepng($im, 'test.png'); imagejpeg($im, 'test.jpg'); ?> Expected result: ---------------- Destination files are similar with source when viewing. -- Edit bug report at https://bugs.php.net/bug.php?id=77368&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77368&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77368&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77368&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77368&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77368&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77368&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77368&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77368&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77368&r=support Expected behavior: https://bugs.php.net/fix.php?id=77368&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77368&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77368&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77368&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77368&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77368&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77368&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77368&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77368&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77368&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77368&r=mysqlcfg