Bug #77052 [NEW]: imagescale() rotates image anti-clockwise by 90 degree after scaling

From: hyh19962008 at gmail dot com Operating system: Windows Server 2012 R2 PHP version: 7.2.11 Package: GD related Bug Type: Bug Bug description:imagescale() rotates image anti-clockwise by 90 degree after scaling Description: ------------ When scaling an image using the GD function imagescale(), the image is rotated anti-clockwise by 90 degree automatically. This happens most frequently when the given image has a greater height than width, and was shot by camera or mobile. Test script: --------------- <?php $filename="C:\inetpub\wwwroot\\apc\\img\\1.JPG"; $pic=imagecreatefromjpeg($filename); $ratio=imagesy($pic)/imagesx($pic); //=height/width $height=136; $width=136/$ratio; $pic=imagescale($pic,$width,$height); imagejpeg($pic,"min//1.jpeg",86); imagedestroy($pic); ?> Expected result: ---------------- image with the following w/h width=136/ratio; height=136; height is greater than width, the image should be presented vertically. Actual result: -------------- image with the following w/h width=136; height=136/ratio; width is greater than height, the image is presented horizontally, because it's rotated anti-clockwise by 90 degree comparing to the original image. I have uploaded the script and sample picture to my website: https://www.swuplaf.cn/abc/test.php //script https://www.swuplaf.cn/abc/img/1.JPG //original picture https://www.swuplaf.cn/abc/min/1.jpeg //scaled picture -- Edit bug report at https://bugs.php.net/bug.php?id=77052&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77052&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77052&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77052&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77052&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77052&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77052&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77052&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77052&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77052&r=support Expected behavior: https://bugs.php.net/fix.php?id=77052&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77052&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77052&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77052&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77052&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77052&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77052&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77052&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77052&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77052&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77052&r=mysqlcfg