PHP Data Types

tutorial and example
tutorial and example

PHP data type is used to hold the various types of data or value.  There are three types of data types in PHP.

It is a loosely data typed language, so there is no need to declare data type like int,float etc.

InPHP,there are some function to check data type and its value.

  • gettype(): It is used to check only data type.
  • var_dump(): It is used to check the size and data type.

Example1:

Output

60 is: integer

1000.56 is: double

PHP is: string

Example2

Output

int(100) string(9) “Hello PHP” float(3.4)

Example of Array:

Output

array(3) { [0]=> string(3) “You” [1]=> string(3) “Are” [2]=> string(14) “Good_Developer” }

Example of Object.

Output

PHP

Example5.

Output

NULL

Example: 6

Note: It is used in database.

Following are the predefine functions to Check data type

Predefine Data type Description
is_int( ) To check the value is integer or not.
is_float( ) To check the value is float or not.
is_numeric( ) To check the value is either integer or float.
is_string( ) To check the value is string or not.
is_bool( ) To check the value is Boolean or not.
is_object( ) To check the value is object or not.
is_null( ) To check the value is null or not.