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<?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 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(3) { ["name"]=> string(6) "Konrad" ["sex"]=> string(3) "man" ["something"]=> NULL }

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