In PHP 5 can I instantiate a class dynamically?

问题

Is it possible to dynamically instantiate a class using a variable? For example is something like this possible in PHP?

class foo
{
    public $something;
}

$class_name = "foo";

$f = new $class_name();

回答1:

That should work, yes.

You can also do:

$f = new $class($arg1,$arg2);

回答2:

Yes, this code will work fine.

回答3:

In PHP 5 can I instantiate a class dynamically?

Yes you can, your code should work fine.

回答4:

Yes of course you can instantiate using dynamic names;

来源：https://stackoverflow.com/questions/3112727/in-php-5-can-i-instantiate-a-class-dynamically