Variables are names given to the location in memory, and these locations are used to store information.
Creating PHP Variables
The PHP variable always starts with a $ sign, followed by the variable name.
<?php $name = "jack"; $age = 21; $height = 6.1; ?>
After execution of this code, the variable $name holds the string value jack, the variable $age hold the integer value 21, and the variable name $height holds the float value 6.1.
You can name a variable according to your convenience, like short names or more descriptive names (age, name, height).
Rules for creating a PHP variable:
- A variable can’t start with a number.
- A variable name always starts with the $sign.
- A variable name must always start with a letter or underscore.
- A variable name can only have underscores and alphanumeric characters.
- A PHP variable is case sensitive.