A variable is used to store information.
Variables are used for storing values, like text strings, numbers or arrays.
When a variable is declared, it can be used over and over again in your script.
All variables in PHP start with a $ sign symbol.
The correct way of declaring a variable in PHP:
New PHP programmers often forget the $ sign at the beginning of the variable. In that case it
will not work.
Let's try creating a variable containing a string, and a variable containing a number:
In PHP, a variable does not need to be declared before adding a value to it.
In the example above, you see that you do not have to tell PHP which data type the variable
PHP automatically converts the variable to the correct data type, depending on its value.
In a strongly typed programming language, you have to declare (define) the type and name of the
variable before using it.
In PHP, the variable is declared automatically when you use it.
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