PHP 利用闭包偷窥马对人类的想法

<?php

/**
 * reference：http://www.php.net/manual/en/reflectionmethod.getclosure.php
 * Learn this and you will know How to peer through what a horse is thinking!
 *
 * Class Client
 */
class People
{
    private $heartWords = "How beautiful the horse is!I want to ride it!";

    public function hook()
    {
        $who = get_class($this);
        echo  ucfirst($who). " says :".$this->heartWords. "
";
    }

    public function peer()
    {
        return function(){
            $this->hook();
        };
    }
}

class Horse
{
    private $heartWords = "How silly the guy is! A big ass!";
}

$people = new People();
$horse  = new Horse();

try{
    $reflection = new ReflectionClass(get_class($people));
}
catch(ReflectionException $e)
{
    echo $e->getMessage() ."
";
    return;
}

$closure = $reflection->getMethod('hook')->getClosure($people);
$truth = $closure->bindTo($horse,$horse);

$truth();     //  Horse says :How silly the guy is! A big ass!