What is the output of the following code?

What is the output of the following code?

class C {

public $x = 1;

function _construct() { ++$this->x;}

function _invoke() { return ++$this->x; }

function _toString() { return (string) –$this->x;}

$obj = new C();

echo $obj();
A . 0
B . 1
C . 2
D . 3

View Answer

Answer: D