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<filter_has_varfilter_input>
^Filter FunctionsLast updated: Mon, 26 Oct 2026

filter_id

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

filter_id — Returns the filter ID belonging to a named filter

Description

function filter_id(string $name): int|false

Parameters

name

Name of a filter to get.

Return Values

ID of a filter on success or false if filter doesn't exist.

See Also


<filter_has_varfilter_input>
^Filter FunctionsLast updated: Mon, 26 Oct 2026