PHP删除数组中某个元素后，键标如何重新排序？

例如：Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5)键值和键标一一对应。如果删除键值4,变为
Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [5] => 5)；
如何得到Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [4] => 5)；达到目的：改变删除数据后面的键标？

答案：$arr=array_merge($arr)；这个函数可以给数组重新进行排序