<?php
function a(){
	$firstname = array('aaa'=>12,'bb'=>300);
	$lastname = array('eee'=>11111,'fff'=>55555);
	$age = "60";
	$result = compact("firstname", "lastname", "age");
	return $result;
}
function b(){
	$result = a();
	extract($result);
	var_dump($firstname);
	echo '<br/>';
	var_dump($lastname);
	echo '<br/>';
	var_dump($age);
}
b();

运行结果：

array(2) { ["aaa"]=> int(12) ["bb"]=> int(300) } 
array(2) { ["eee"]=> int(11111) ["fff"]=> int(55555) } 
string(2) "60"