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<?php $mapping = [ "AccountId" => "account_id", "Id" => "master_id", "Name" => "name" ]; $input = [ "AccountId" => "18", "Id" => "53600065", "Name" => "Awesome Test Company From SS", "Financial" => [ "vat" => "12345", ] ]; $output = []; foreach ($mapping as $from => $to) { if (array_key_exists($from, $input)) { $output[$to] = $input[$from]; } } var_dump($output);
based on QWiWp
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
array(3) { ["account_id"]=> string(2) "18" ["master_id"]=> string(8) "53600065" ["name"]=> string(28) "Awesome Test Company From SS" }