How can I avoid using create_function for creating custom functions in PHP?

Avoid using create_function in PHP because it is deprecated and has been removed in newer versions of PHP. Instead, you can define custom functions using the anonymous function syntax (also known as closures) or by creating a traditional named function.

// Using anonymous function (closure)
$customFunction = function($param1, $param2) {
    return $param1 + $param2;
};

// Using traditional named function
function customFunction($param1, $param2) {
    return $param1 + $param2;
}