PHP | 删除数组中指定索引的元素，并且重排索引

<?php
  $array = array(0 => "a", 1 => "b", 2 => "c");
  unset($array[1]);
  print_r($array);

  $array = array_values($array);    
  print_r($array);   
?>

Array
(
    [0] => a
    [2] => c
)
Array
(
    [0] => a
    [1] => c
)