Which of the given options is the correct output of the following PHP 7.1 program?

function swap(&$x, &$y): void

{

if ($x === $y) {

return;

}

$exp = $x;

$x = $y;

$y = $exp;

}

$var1 = 12;

$var2 = 20;

var_dump(swap($var1, $var2), $var1, $var2);?>

Which cast option can be used for explicitly converting a value to integer?

class First { private $foo = 2; protected $bar = 4; protected function A_funct() { return 5; } public function B_funct() { return new class($this->foo) extends First { private $test; public function _construct($foo) { $this->test = $foo; } public function C_funct() { return $this->bar + $this->test + $this->A_funct(); } }; } } echo (new First)->B_funct()->C_funct();?>

var_dump(0 == 'x'); var_dump('2' == '02'); var_dump('20' == '2e2'); var_dump(200 == '2e4'); switch ('x') { case 0: echo '0'; break; case 'x': echo 'x'; break; } ?>

for($a=0,$b=20; $a<50; $a++) { while($b--) { if($b==8) goto end; } } echo 'a = $a'; end: echo ?>

$E_array = array( 'test' => 'code', 64 =>46, 'multi' => array( 'dimensional' => array( 'array' => 'test' ) ) ); var_dump($E_array['test']); var_dump($E_array [64]); var_dump($E_array['multi']['dimensional']['array']); ?>

To ensure that a given object has a particular set of methods, you must provide a method list in the form of an ________ and then attach it as part of your class using the ________ keyword.

$sweet = array('1' => 'apple', '2' => 'banana'); $fruits = array('delicious' => $sweet, 'sweet' => 'strawberry'); function myprint($item, $key) { echo '$key is $item\n'; } array_walk_recursive($fruits, 'myprint'); In above code, what is the output?

Best way to iterate and modify every element of an array using PHP 5?

What prefix prevents child classes from overriding a method

Output of the following code: sayHello($c);