note 126821 added to language.types.callable

In PHP >= 8.0 callIt function with optional parameters. <?php declare(strict_types = 1); class Example { public static function someFunction(string $value, string $a_parameter, int $another_parameter): string { //TODO: Apply the required filter return "$value $a_parameter $another_parameter"; } public static function callIt(string $callback, ...$parameters): callable { return static fn(mixed $value = null) => self::$callback($value, ...$parameters); } } ?> How to use: <?php declare(strict_types = 1); $args = [ 'information' => ['filter' => FILTER_CALLBACK, 'options' => Example::callIt('someFunction', 'world', 2022)], ]; $unfiltered_data = ['information' => 'Hello']; $filtered_data = filter_var_array($unfiltered_data, $args); if(false === $filtered_data) { echo "Error...", PHP_EOL; } echo var_export($filtered_data, true); ?> Result: array ( 'information' => 'Hello world 2022' ) ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.135 (proxied: 186.32.217.53) ---- Manual Page -- https://php.net/manual/en/language.types.callable.php Edit -- https://main.php.net/note/edit/126821 Del: integrated -- https://main.php.net/note/delete/126821/integrated Del: useless -- https://main.php.net/note/delete/126821/useless Del: bad code -- https://main.php.net/note/delete/126821/bad+code Del: spam -- https://main.php.net/note/delete/126821/spam Del: non-english -- https://main.php.net/note/delete/126821/non-english Del: in docs -- https://main.php.net/note/delete/126821/in+docs Del: other reasons-- https://main.php.net/note/delete/126821 Reject -- https://main.php.net/note/reject/126821 Search -- https://main.php.net/manage/user-notes.php