PHP Manual

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PHP function is_callable()

11. 09. 2019

Obsah článku

Version availability: `PHP 4.0.6`

Verify that the contents of a variable can be called as a function

Parameters

Parameter	Data type	Default value	Note
`$name`	`callback	callable`	not
`$syntax_only`	`bool`	null,	If set to true the function only verifies that name might be a function or method. It will only reject simple variables that are not strings, or an array that does not have a valid structure to be used as a callback. The valid ones are supposed to have only 2 entries, the first of which is an object or a string, and the second a string.
`$callable_name`	`string`	null	Receives the "callable name". In the example below it is "someClass::someMethod". Note, however, that despite the implication that someClass::SomeMethod() is a callable static method, this is not the case.

Return values

bool

true if name is callable, false otherwise.

Other resources

Official is-callable documentation

Jan Barášek

Jan Barášek Více o autorovi

Autor článku pracuje jako seniorní vývojář a software architekt v Praze. Navrhuje a spravuje velké webové aplikace, které znáte a používáte. Od roku 2009 nabral bohaté zkušenosti, které tímto webem předává dál.

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