如何顯示數組的鍵？

Question

我有一個數組尋找這樣：

Array 
(
[0] => a 
[1] => b 
[3] => c 
[4] => d 
[15] => e 
) 

，我想這樣的事情：

Array 
(
[0] => a 
[1] => b 
[2] => c 
[3] => d 
[4] => e 
) 

如何獲得預期的效果？

Answer 1

$new_array = array_values($old_array); //this will return sorted one 

的

Answer 2

array_values($array) 

Easy as pie :)