How many constants does the DateTime class have? 

What will be the output of the following PHP code?

What is the output of the following PHP code?

<?php echo ord('hi'); ?>

How do you create a session in PHP?

How does PHP recognize constructors?

When you use the $_POST variable to collect data, the data is visible to whom?

Which PHP function is used to filter multiple variables at once?

The correct way to invoke a method in PHP is:

Which of the following are valid function names?

Which of these does not describe a validating filter?