Summary of common data types in PHP

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PHP data types

PHP supports eight primitive types.

Four scalar types:

string (string)

integer (integer)

float (also double)

boolean

Two composite types:

array (array)

object

Two special types:

resource

NULL

View variable types

The gettype() function allows you to easily check the type of a variable:

The copy code is as follows:

(PS: T good PHP Q button: 276167802, verification: csl)

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For historical reasons, gettype() returns double instead of float for float data.

If you want to see the value and type of an expression, use the var_dump() function.

Determine variable type

If you want to determine the next logical action by judging the variable type, don't use gettype(), but use the is_type series function:

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