Question: 1
What is the output of the following code?
echo "1" + 2 * "0x02";
Question: 2
What is the output of the following code?
echo "22" + "0.2", 23 . 1;
Question: 3
What is the output of the following code?
class Foo Implements ArrayAccess {
function offsetExists($k) { return true;}
function offsetGet($k) {return 'a';}
function offsetSet($k, $v) {}
function offsetUnset($k) {}
}
$x = new Foo();
echo array_key_exists('foo', $x)?'true':'false';
Question: 4
What is the output of the following code?
class Bar {
private $a = 'b';
public $c = 'd';
}
$x = (array) new Bar();
echo array_key_exists('a', $x) ? 'true' : 'false';
echo '-';
echo array_key_exists('c', $x) ? 'true' : 'false';
Question: 5
What is the output of the following code?
$a = array('a', 'b'=>'c');
echo property_exists((object) $a, 'a')?'true':'false';
echo '-';
echo property_exists((object) $a, 'b')?'true':'false';
