PHP Variables: 005

[Cohort Master]

Variables are "containers" for storing information.

Creating (Declaring) PHP Variables
In PHP, a variable starts with the $ sign, followed by the name of the variable:

Example

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<?php
$x = 5;
$y = "John";
?>
In the example above, the variable $x will hold the value 5, and the variable $y will hold the value "John".

Note: When you assign a text value to a variable, put quotes around the value.

Note: Unlike other programming languages, PHP has no command for declaring a variable. It is created the moment you first assign a value to it.

Think of variables as containers for storing data.

PHP Variables
A variable can have a short name (like $x and $y) or a more descriptive name ($age, $carname, $total_volume).

Rules for PHP variables:

A variable starts with the $ sign, followed by the name of the variable
A variable name must start with a letter or the underscore character
A variable name cannot start with a number
A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )
Variable names are case-sensitive ($age and $AGE are two different variables)

Remember that PHP variable names are case-sensitive!