php – 我们称这是什么?

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我想知道我们称这种作业是什么.
<?PHP
class SimpleClass
{
    public $var1;
    public $var2;
    public $var3;

    public function SimpleClass()
    {
        $this->var1 = 'one';
        $this->var2 = 'two';
        $this->var3 = 'three';
    }
}

function test()
{
    $objSc = new SimpleClass();
    $objSc->var4 = 'WTF?!'; # <-- what do we call this?
    var_dump($objSc);
}

test();
?>

更好的参考或链接.提前致谢!

编辑:我正在寻找一个技术术语,好吧,如果我们有.

我相信这是超载.

Overloading in PHP provides means to dynamically “create” properties and methods. These dynamic entities are processed via magic methods one can establish in a class for varIoUs action types.

The overloading methods are invoked when interacting with properties or methods that have not been declared or are not visible in the current scope.

PHP手册参考here.

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