note 115006 added to function.array-intersect-key

Here is a better way to merge settings using some defaults as a whitelist. <?php $defaults = [ 'id' => 123456, 'client_id' => null, 'client_secret' => null, 'options' => [ 'trusted' => false, 'active' => false ] ]; $options = [ 'client_id' => 789, 'client_secret' => '5ebe2294ecd0e0f08eab7690d2a6ee69', 'client_password' => '5f4dcc3b5aa765d61d8327deb882cf99', // ignored 'client_name' => 'IGNORED', // ignored 'options' => [ 'active' => true ] ]; var_dump( array_merge_recursive($defaults, array_intersect_key( $options, $defaults ) ) ); ?> Output: array (size=4) 'id' => int 123456 'client_id' => int 789 'client_secret' => string '5ebe2294ecd0e0f08eab7690d2a6ee69' (length=32) 'options' => array (size=2) 'trusted' => boolean false 'active' => boolean true ---- Server IP: 72.52.91.14 Probable Submitter: 72.52.91.14 ---- Manual Page -- http://php.net/manual/en/function.array-intersect-key.php Edit -- https://master.php.net/note/edit/115006 Del: integrated -- https://master.php.net/note/delete/115006/integrated Del: useless -- https://master.php.net/note/delete/115006/useless Del: bad code -- https://master.php.net/note/delete/115006/bad+code Del: spam -- https://master.php.net/note/delete/115006/spam Del: non-english -- https://master.php.net/note/delete/115006/non-english Del: in docs -- https://master.php.net/note/delete/115006/in+docs Del: other reasons-- https://master.php.net/note/delete/115006 Reject -- https://master.php.net/note/reject/115006 Search -- https://master.php.net/manage/user-notes.php