PHP version 7.3 or newer is required, with the *intl* extension and *mbstring* extension installed.
Codeigniter 4 cannot run if your web server does not enable intl extension, php-json, php-mbstring, php-mysqlnd, and php-xml. You can check it in phpinfo, if one of the extensions is disabled, please activate it in the php.ini file.
MySQL (5.1+) via the MySQLi driver
For the details, please visit official documentation from Codeigntier
Important! Make sure you already enable all the PHP extensions required
My php.ini file at local server (XAMPP)
My PHP Extension at CPanel server