Hướng dẫn gettype in php

[PHP 4, PHP 5, PHP 7, PHP 8]

gettype — Get the type of a variable

Description

gettype[mixed $value]: string

Parameters

The variable being type checked.

Return Values

Possible values for the returned string are:

• "boolean"
• "integer"
• "double" [for historical reasons "double" is returned in case of a float, and not simply "float"]
• "string"
• "array"
• "object"
• "resource"
• "resource [closed]" as of PHP 7.2.0
• "NULL"
• "unknown type"

Changelog

Examples

Example #1 gettype[] example

The above example will output something similar to:

integer
double
NULL
object
string

See Also

• get_debug_type[] - Gets the type name of a variable in a way that is suitable for debugging
• settype[] - Set the type of a variable
• get_class[] - Returns the name of the class of an object
• is_array[] - Finds whether a variable is an array
• is_bool[] - Finds out whether a variable is a boolean
• is_callable[] - Verify that a value can be called as a function from the current scope.
• is_float[] - Finds whether the type of a variable is float
• is_int[] - Find whether the type of a variable is integer
• is_null[] - Finds whether a variable is null
• is_numeric[] - Finds whether a variable is a number or a numeric string
• is_object[] - Finds whether a variable is an object
• is_resource[] - Finds whether a variable is a resource
• is_scalar[] - Finds whether a variable is a scalar
• is_string[] - Find whether the type of a variable is string
• function_exists[] - Return true if the given function has been defined
• method_exists[] - Checks if the class method exists

Anonymous ¶

7 months ago

Same as for "boolean" below, happens with integers. gettype[] return "integer" yet proper type hint is "int".

If your project is PHP8+ then you should consider using get_debug_type[] instead which seems to return proper types that match used for type hints.