PHP Data Type _ PHP Tutorial

PHP Data type. PHP Data types PHP supports eight primitive types ). Four scalar types: string (string) integer (integer) float (float type, also double) boolean (boolean type) PHP data type

PHP supports eight primitive types ).

Four scalar types:

String (string)

Integer)

Float (float, also double)

Boolean (boolean)

Two composite types:

Array)

Object)

Two special types:

Resource)

NULL)

View variable types

The gettype () function allows you to conveniently view the type of a variable:

It indicates that for historical reasons, if float data is returned, the gettype () function returns double instead of float.

To view the value and type of an expression, use the var_dump () function.

Judge variable type

To determine the next logical action by determining the variable type, use the is_type series functions instead of gettype:

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