php 自定义函数大全

1. call_user_func和call_user_func_array

以上两个函数以不同的参数形式调用函数。见如下示例：
<?php

class demo
{
public static function action1()
{
echo "This is demo::action1.<br>";
}

public function action2()
{
echo "This is demo::action2.<br>";
}

public function actionWithArgs($arg1, $arg2)
{
echo 'This is demo::actionWithArgs with ($arg1 = ' . $arg1 . ' and $arg2 = ' . $arg2 . ").<br>";
}
}

$demo = new demo();
call_user_func(array("demo", "action1"));
call_user_func(array($demo, "action2"));
call_user_func(array($demo, "actionWithArgs"), "hello", "world");
call_user_func_array(array($demo, "actionWithArgs"), array("hello2", "world2"));

运行结果如下：

This is demo::action1.
This is demo::action2.
This is demo::actionWithArgs with ($arg1 = hello and $arg2 = world).
This is demo::acti