Rotate array elements to the left (move first element to last and re-index)

by 
  $numbers = array(1,2,3,4);
  array_push($numbers, array_shift($numbers));
  print_r($numbers);

Output

Array
(
    [0] => 2
    [1] => 3
    [2] => 4
    [3] => 1
)

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