<?php

class Foo 
{
	public $array = array('key' => "someFunc");

	public function someFunc($foo, $bar); 
	{
		return $foo;
	}

	public function anotherFunc() 
	{
		foreach($this->array as $value) {
			$bar = call_user_func(["Foo", $value], ["FOO", "BAR"]);
		}

		return $bar;
	}
}

$foo = new Foo();

var_dump($foo->anotherFunc());