Original array: Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) After left shift: Array ( [0] => 2 [1] => 3 [2] => 4 [3] => 5 [4] => 1 ) After right shift: Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 )