Datatypes

The main types of data in the PHP programming is Integers, Floating-Point Numbers, Strings, and Arrays.

Integers

are whole numbers such as 3, 200, 9,043,098, -20 -20,000 and -1

Floating-Point Numbers or Double data type

are numbers like 0.75, -3.254, and 3.14159

Strings

are words like Hello, GoodBye, and so on.

Arrays are a grouping like of different data types all together in one variable.

http://phpsourcecode.kevinsitinfo.com/datatype/  Datatype example program