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@ 2017-06-05T21:07:01Z

<?php
function namedParams (array $params, array $defaults){
    $params += $defaults;
    $allowedKeys = array_keys($defaults);
    $isUnexpected = array_filter($params, function ($k) use ($allowedKeys){
        return !in_array($k, $allowedKeys);
    }, ARRAY_FILTER_USE_KEY);
    if(!empty($isUnexpected)){
        throw new InvalidArgumentException('Unexpected parameters: '.implode(',',array_keys($isUnexpected))); 
    }    
    return $params;
} 

function test (array $params){
    //we can try ... and catch any problems if we want, but to keep it simple, we can just do this.
    //These and only these params are expected. Plus, we give them default values.
    $paramsProcessed = namedParams($params,[
        'name' => 'Unknown',
        'sex' => 'man',
        'something' => NULL,
    ]); 
    var_dump($paramsProcessed);
}

test(['name' => "Konrad"]);

Output for git.master, git.master_jit, rfc.property-hooks: array(3) { ["name"]=> string(6) "Konrad" ["sex"]=> string(3) "man" ["something"]=> NULL }

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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