“call to undefined function imagecreatetruecolor” error in PHP & pChart

Question

I am trying to integrate \"pChart\" with my PHP code. When I am trying to run the samples it gives me an error stating call to undefined function imagecreatetruecolor<

Answer 1

I have same error:

PHP Fatal error:  Call to undefined function imagecreatetruecolor() in /var/www/webphp/php/captcha.php on line 251

and my solution was this:

$ locate php.ini
    /etc/php56/php.ini

edit file php.ini and uncomment line content "extension=gd.so", save and try again