What is the difference between running PHP as CGI or CLI and how does it affect functionality like the dl() function?

When running PHP as CGI, the dl() function, which is used to dynamically load a PHP extension at runtime, is disabled for security reasons. This means that you cannot use the dl() function when running PHP as CGI. To work around this limitation, you can switch to running PHP as CLI, which allows the use of the dl() function.

// To use the dl() function in PHP, switch to running PHP as CLI instead of CGI.
// You can run PHP as CLI by executing your PHP script from the command line.

// Example of running a PHP script from the command line:
// php your_script.php