1There are 8 data types in PHP which are used to construct the variables:
21. Integers - are whole numbers without a decimal point, like 4195.
32. Doubles - are floating-point numbers, like 3.14486 or 49.1.
43. Booleans - have only two possible values either true or false.
54. Null - is a special type that only has one value:Null.
65. Strings - are sequences of characters.
76. Arrays - are named and indexed collection of other values.
87. Objects - are instances of programmer-defined classes, which can package up both other kinds of values and functions that are specific to the class.
98. Resources- are spacial varibles that hold references to resources external to PHP.