/**
1. __get/__set
2. __call/__callStatic
3. __toString
4. __invoke
*/

<?php
namespace tests\test;

class A
{
    protected $array = array();
    function __set($key, $value)
    {
        $this->array[$key] = $value;
    }
    function __get($key)
    {
        return $this->array[$key];
    }
    function __call($func, $params)
    {
        var_dump($func, $params);
        echo "<br>";
    }
    public static function __callStatic($func, $params)
    {
        var_dump($func, $params);
        echo "<br>";
    }
    static function getArr()
    {
        print_r(__FILE__);
        echo "<br>";
    }
    function __toString()
    {
        return __CLASS__;
    }
    function __invoke($param)
    {
        var_dump($param);
        return "invoke";
    }
}

<?php
spl_autoload_register('autoload');

function autoload($class)
{
    require __DIR__.'/'.$class.'.php';
}

$a = new tests\test\A();
$a->title = 1; // 对象属性不存在，自动回调__set
print_r($a->title);// 对象属性不存在，自动回调__get
echo "<br>";
tests\test\A::getArr();
$a->getTitle(12, 34); //方法不存在，自动回调__call
tests\test\A::getTitle(); //静态（类）方法不存在，自动回调__callStatic
echo $a; //自动回调__toString
echo "<br>";
echo $a(1); //自动回调__invoke