使用php callable来调用构造函数

Question

I am trying to call a class' constructor through a callable, so I had the following code:

$callable = array('Foo', '__construct');

However calling this will throw the following error:

Fatal error: Non-static method Foo::__construct() cannot be called statically

I understand that the constructor is not a static method, but I can't use an existing instance to call the constructor for a new instance (as it will just call the constructor on the existing object again), is there any way at all to call a constructor like this?

Answer 1

If you really have to use call_user_func, this might work, though it's not clear why you would want to do this:

$reflection = new ReflectionClass("Foo");
$instance = $reflection->newInstanceWithoutConstructor();
call_user_func(array($instance, '__construct'));