<?php
/*Variables:
(1)Php has 8 types of variables which include:
- Boolean (true/false)
- integers
- floating integers
- strings
- arrays
- objects
- resources
- null
(2)variables must start with $ sign
(3)Variable names can contain a combination of strings, numbers and underscores
(4)The first character in the name of a variable must be either a letter or underscore
(5)Php variable names are case sensitive
(6)Variables can be assigned with equal signs and printed without quotation marks Eg, print $some_variable; , or echo $some_variable;
(7)Variables can also be printed with double quotations but cannot with single quotes
echo 'Defining a variable:' ,*/
$variable_name = 'this is a string representation of a variable';
echo $variable_name;
echo 'this is a integer representation of a variable';
$variable_name = 30;
?>