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2.3.    Variables in PHP

 

All variables in PHP start with: $ (symbol). The $ symbol is followed by the name of the variable. The name must not start with a number. It must start only with lowercase or uppercase letter or underscore followed by any letters, numbers or underscores. The variable name is case-sensitive. For example, the following variables: $words, $Words, $_words, are different

 

You assign the name of the variable. A suggestive name is better to use for the variable. This will help in your work.

 

It is not necessary to initialize variables in PHP however it is a very good practice. Un-initialized variables have a default value of their type - FALSE, zero, empty string or an empty array.

 

Example 4:   (inside of echo statement you can use variables.)

 

<?php

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