PHP Variables are used to store values. We can use variables in PHP program so that we can use or manipulate later in the program. PHP is a loosely typed scripting language which means that we do not have to tell which data type the variable will hold.
In PHP language, a variable starts with a dollar ($) sign.
$php_variable_name = value;
php_variable_name is name of the variable which holds the value. We use an assignment operator to store the value in the variable.
Some variable naming rules are as follows:
A variable name can start with a letter or an underscore “_”
A variable name should not contain whitespaces.
A variable name can be comprised of alpha-numeric characters and underscores. (a-z, A-Z, 0-9, or _)
The IDE editor will prompt with PHP Platform variables when we type $ sign in the program. We can pick the required variables name automatically without the need of typing the whole variable name.
In the following statement, we will assign a value of “79” to the variable named as “number”.
$number = 79;
Note that: Variable names are case-sensitive in PHP language. $NUMBER and $number are two different variables in PHP.
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