What is the output of the following code? $a = "b"; $b = 22; echo $$a + 40;

How many elements are in the array created by the following line of code: $array = array (true => '5', 1 => '6');

What is the output? 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?

The PHP mail() function allows you to...

In the PHP code given below, what is/are the properties?

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?