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.info/datatype/ Datatype example program