Which of the following functions split the string and return the array?

Which values should be assigned to the variables $a, $b and $c in order for the following script to display the string Hello, World!

How do you make PHP use a class file without having to require or include it manually?

Difference between $message and $$message?

What visibility level will this class property get in PHP5? var $cool = true;

.... operator is used to test if two values are identical in every way.

With the following code, will the word Hello be displayed on screen? Hello

Which is a type of array in PHP?

What kind of regular expression does PHP include?

What does the array_unshift () function do?

When comparing two arrays, what is the difference between == and === ?