What are the variables in PHP
- Variables are containers that store data (like text, numbers, etc.) within your PHP code.
- They act like temporary storage locations for information that your script needs to use.
How to Declare a Variable:
- All PHP variables start with a dollar sign (
$
). - Example:
$name
,$age
,$price
,$product_id
.
Naming Variables:
Variables are Case-sensitive which means
$name
and$Name
are considered different variables.Variables can contain letters (a-z, A-Z), numbers (0-9), underscores (_), and dollar signs ($).
A variable must start with a letter, underscore, or dollar sign.
A variable cannot start with a number.
Example:
<?php
$A = "Hello How are You";
echo $A;
$Num = 3.12;
echo $Num;
?>
In this example:
- This PHP code declares two variables, a string
$A
with the value “Hello How are You” and a float$Num
with the value 3.12, and then outputs their values to the browser.