func_get_args() Skips Variadic

<?php

function foo($a, ...$arg) {
    print_r(func_get_args());
    print_r($arg);
    print_r($a);
}

function goo(...$arg) {
    print_r(func_get_args());
    print_r($arg);
}

foo(...[ 'b' => 2, 'a' => 1,'d' => 3]);
print PHP_EOL;
print PHP_EOL;
goo(...[ 'b' => 2, 'a' => 1,'d' => 3]);

func_get_args() does not provide the variadic argument, when there is one. It is simply omitted.

func_get_args() lists only the declared parameters, with their position, rather than their name.

func_get_args() is the traditional way to hand arbitrary number of arguments, and with this difference of behavior related to variadic, it provides a different set of features.

Nowadays, 23% of PHP applications use this feature.

See Also

• func_get_args() (PHP manual)
• func_get_args() versus variadic [Try me]

PHP Features

• variadic
• arbitrary-argument

Last updated: 10 September 2026