$arr = array('a' => 1, 'b' => 2, 'c' => 3); unset($arr['b']); // RESULT: array('a' => 1, 'c' => 3) $arr = array(1, 2, 3); array_splice($arr, 1, 1); // RESULT: array(0 => 1, 1 => 3)