Comparison of javascript and PHP dynamically adding methods to classes

This article mainly introduces the relevant information on the comparison between JAVASCRIPT and PHP for dynamically adding methods to classes. Friends in need can refer to

1. JAVASCRIPT:

a. Code:

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

b. Output:

hello

2. PHP :

a. Code:

<?php
class a{

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

b. Output:

hello

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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