In PHP, we specify variables with a dollar ($) sign. Even here you can deduce that PHP is a very rich language.
A list of rules that you must follow when defining a variable;
1) You cannot use characters other than letters, numbers, and underscores (_).
2) You cannot initialize the variable name with a number. (
$1 variable is false,
$variable1 is true)
3) PHP distinguishes variable names, so
$variable is not the same as
All terms matching these three rules can be a variable names.
Here are a few examples of suitable variables: