php中的闭包类

看注释

<?php
//闭包类实现匿名函数
//call方法调用

class Customer {
    private $firstname;
    private $lastname;

    public function __construct($firstname, $lastname) {
        $this->firstname = $firstname;
        $this->lastname = $lastname;
    }
}

$customer = new Customer('John', 'Doe');

$greeting = function($message) {
    return "$message $this->firstname $this->lastname!";
};

echo $greeting->call($customer, 'Hello');

?>

输出

Hello John Doe!