QUESTION: 29

What is the output of the following code?
function z($x) {
return function ($y) use ($x) {
return str_repeat($y, $x);
};
}
$a = z(2);
$b = z(3);
echo $a(3) . $b(2);

22333
33222
33322
222333

Answer(s): B

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QUESTION: 30

What is the output of the following code?
$f = function () { return "hello"; };
echo gettype($f);

hello
string
object
function

Answer(s): C

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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();

0
1
2
3

Answer(s): D

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QUESTION: 32

CORRECT TEXT
Consider the following code. Which keyword should be used in the line marked with "KEYWORD" instead of "self" to make this code work as intended?
abstract class Base {
protected function __construct() {
}
public static function create() {
return new self(); // KEYWORD
}
abstract function action();
}
class Item extends Base {
public function action() { echo __CLASS__; }
}
$item = Item::create();
$item->action(); // outputs "Item"

static

Answer(s): A

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QUESTION: 29

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QUESTION: 32