What is the output of the following code? session_start(); $_SESSION['logged_in'] = true; $_SESSION['name'] = 'Jane'; $_SESSION['level'] = 4; echo session_encode();

Which type of variables are instances of programmer-defined classes?

Operator to check if two values are equal and of same data type?

Function to get the number of arguments passed to the function?

Which return true keeping in view the following code? function validateDate($date, $format = 'Y-m-d H:i:s') { $d = DateTime::createFromFormat($format, $date); return $d && $d->format($format) == $date; }

Output using PHP 5.6.0 or higher? const ONE = 1; class foo { const TWO = ONE * 2; const THREE = ONE + self::TWO; const SENTENCE = 'The value of THREE is '.self::THREE; } echo foo::SENTENCE . '\n';

The case expression is used as part of a PHP ____.

What's the output?

There are two objects- $product1 = new Shop(); $product2 = new Shop(); Which is right about them?

Which PHP function returns 'true' if a value already exists in an array?

What is meaning of PEAR?