What will be the output of the following PHP 7.1 code?

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']); ?>

class Example { public function abcFunction() { return Closure::fromCallable([$this, } private function privateFunction($param) { var_dump($param); } } $expFunc = (new Example)->abcFunction(); $expFunc('My New Example');?>

Which option can be the key of an array?

var $example = var $array = array('My name is A.', 'My name is B.', 'My name is C.'); var $r = 'My name is r.'; } $f = new f(); $example = 'example'; $b = array('f', 'example', 'b', 'c'); echo $f->$example. '\n'; echo $f->{$b[1]} . '\n'; $start = 'exa'; $end = 'mple'; echo $f->{$start. $end}. '\n'; $array = 'array'; echo $f->{$array[1]}. '\n'; ?>

What prefix prevents child classes from overriding a method

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

Add five days to a PHP5 date-object like this: $date_object = date_create('1/18/2015');

What is wrong with the following code? setValue(10); $a_copy->setValue(20); ?>

Which functions allows you to store session data in a database?