Function

PHP Function
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func_get_args()

func_get_args(): array

Returns an array comprising a function’s argument list

function MyFunction() {
  $function_arguments = func_get_args();
    print_r($function_arguments);
}


MyFunction('a', 'b', 'c', 1, 2, 3);
// Array
// (
//     [0] => a
//     [1] => b
//     [2] => c
//     [3] => 1
//     [4] => 2
//     [5] => 3
// )

func_get_arg()

func_get_arg(int $position): mixed

Return an item from the argument list

function MyFunction() {
    $function_argument = func_get_arg(0);
    print_r($function_argument);     // a
}


MyFunction('a', 'b', 'c', 1, 2, 3);  // a

func_num_args()

func_num_args(): int

Returns the number of arguments passed to the function

function MyFunction() {
    $function_arguments_nums = func_num_args();
    var_dump($function_arguments_nums);       // 6
}

MyFunction('a', 'b', 'c', 1, 2, 3);

call_user_func()

call_user_func(callable $callback, mixed ...$args): mixed

Call the callback given by the first parameter

function MyFunction(string $name, int $age) {
    print_r($name); // KJ
    print_r($age);  // 18
}

call_user_func('MyFunction', 'KJ', 18);

call_user_func_array()

call_user_func_array(callable $callback, array $args): mixed

function MyFunction(string $name, int $age) {
    print_r($name); // KJ
    print_r($age);  // 18
}

call_user_func_array('MyFunction', ['KJ', 18]);
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