What is the good example of using 'func_get_arg' in PHP?

Question

I just have found out that there is a function called func_get_arg in PHP which enables developer to use variant style of getting arguments. It seems to be very us

Answer 1

As of php5.6, there isn't a use case of func_get_arg anymore; which isn't to say that its functionality isn't needed anymore, but is replaced by the variadic function using the ... syntax:

/**
 * @param array $arguments
 */
public function poit(...$arguments)
{
     foreach($arguments as $argument) {
         ...
     }
}

This is especially useful if there are methods that are overloaded at the end; one does need to filter out the first arguments anymore, as showcased by an example:

Old style using func_get_arg:

function foo($a, $b) {
    $c = array();
    if (func_num_args() > 2) {
        for($i = 0; $i < func_num_args()-2; $i++) {
            $c[] = func_get_arg($i+2);
        }
    }
    var_dump($a, $b, $c)
    // Do something
}
foo('a', 'b', 'c', 'd');

Newer variadic style;

function foo($a, $b, …$c) {
    var_dump($a, $b, $c);
    // Do something
}
foo('a', 'b', 'c', 'd');

Both foo produce the same output, one is much simpler to write.