20:34:39 Create new PHPExcel object
20:34:39 Set document properties
20:34:39 Generate an image

Fatal error: Uncaught Error: Call to undefined function imagecreatetruecolor() in /var/www/html/shiksha_web/vendor/phpoffice/phpexcel/Examples/25inmemoryimage.php:57 Stack trace: #0 {main} thrown in /var/www/html/shiksha_web/vendor/phpoffice/phpexcel/Examples/25inmemoryimage.php on line 57