Enabling/installing GD extension? --without-gd
if you are on a Debian based server (such as Ubuntu) you can run the following command:
apt-get install php-gd
Then once it is complete run:
/etc/init.d/apache2 restart
This will restart your server and enable GD in PHP.
If you are on another type of system you will need to use something else (like yum install) or compile directly into PHP.
For PHP7.0 use (php7.1-gd, php7.2-gd, php7.3-gd andphp7.4-gd are also available):
sudo apt-get install php7.0-gd
and than restart your webserver.
For PHP8 use:
sudo apt-get install php8.0-gd
Check if in your php.ini file has the following line:
;extension=php_gd2.dll
if exists, change it to
extension=php_gd2.dll
and restart apache
(it works on MAC)