javascript与PHP动态往类中添加方法对比

1.JAVASCRIPT:

a. 代码:

var a = function(){
}
var my_a = new a()
my_a.say = function(){
console.log('hello')
}
my_a.say()

b. 输出:

hello

2. PHP:

a. 代码:

<?php
class a{

}
$a = new a();
$a->say = function(){
echo "hello";
};
$say = $a->say;
$say();

b. 输出:

hello

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