Fatal error: Uncaught Error: Call to undefined function imagecreate() in C:\xampp\htdocs\Index\captcha\securimage.php:260 Stack trace: #0 C:\xampp\htdocs\Index\captcha\securimage.php(170): Securimage->doImage() #1 C:\xampp\htdocs\Index\captcha\securimage_show.php(77): Securimage->show() #2 {main} thrown in C:\xampp\htdocs\Index\captcha\securimage.php on line 260