Online PHP editor | output for UmNhZ

<?php $oldArray = [ [ 'id' => 123, 'name' => 'abc', ], [ 'id' => 456, 'name' => 'def', ] ]; $newArray = [ [ 'id' => 456, 'name' => 'ghi', ], [ 'id' => 789, 'name' => 'jkl', ], ]; $expected = [ [ 'id' => 123, 'name' => 'abc', ], [ 'id' => 456, 'name' => 'ghi', ], [ 'id' => 789, 'name' => 'jkl', ], ]; $old = array_column($oldArray,null,'id'); $new = array_column($newArray,null,'id'); $upd = array_values(array_replace_recursive($old, $new)); var_dump($upd == $expected);