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
