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<?php $promos = [ '123' => ['id' => '123', 'weight' => 1], '234' => ['id' => '234', 'weight' => 3], '345' => ['id' => '345', 'weight' => 2], ]; $cr['promos'] = [ '123' => ['id' => '123', 'weight' => 1], '234' => ['id' => '234', 'weight' => 3], '345' => ['id' => '345', 'weight' => 2], ]; $promo_weights = array_column($promos, 'weight', 'id'); array_multisort($promo_weights, SORT_ASC, $cr['promos']); var_dump($cr['promos']);
Output for 5.6.30
array(3) { [0]=> array(2) { ["id"]=> string(3) "123" ["weight"]=> int(1) } [1]=> array(2) { ["id"]=> string(3) "345" ["weight"]=> int(2) } [2]=> array(2) { ["id"]=> string(3) "234" ["weight"]=> int(3) } }