This article mainly introduces PHP using unset () to delete a cell (key) in the array method, example analysis of the unset function in the deletion of the array unit of the use of skills, the need for friends can refer to the
This example describes how PHP uses unset () to delete a cell (key) in an array. Share to everyone for your reference. The specific analysis is as follows:
unset You can delete a variable, or you can delete a cell in an array. However, it is to be noted that the array does not rebuild the index.
Examples are as follows:?
|1 2 3 4 5 6||<?php $arr = Array ("Chaoyang District", "Haidian District", "Xicheng District", "Dongcheng District", "Fengtai District"); Unset ($arr ); echo "<pre>"; Print_r ($arr);?>|
The output results are as follows:?
|1 2 3 4 5 6 7||Array ( => Chaoyang District  => Haidian District  => Xicheng District  => Fengtai District)|
I hope this article will help you with your PHP program design.