Fatal error: Uncaught Error: Call to undefined function imagecreatefrompng() in C:\web\www\TestImageConversion.php:14 Stack trace: #0 C:\web\www\TestImageConversion.php(5): ResizePicture('A5071.png', 200, 200) #1 {main} thrown in C:\web\www\TestImageConversion.php on line 14