PHP Unset Array值对其他索引的影响

问题描述

我正在处理一个PHP循环，并且我有一个关于未设置如何影响数组键的问题.该数组使用PHP指定的标准数字键0, 1, 2, 3 etc....每当unset()在数组值上运行时，数组键是否会被随机播放或像以前一样被维护?

I am working with a PHP loop, and I had one question regarding how unset affects the array keys. This array uses the standard numeric keys assigned by PHP, 0, 1, 2, 3 etc.... Whenever unset() runs on an array value, are the array keys shuffled or are they maintained as before?

谢谢您的时间.

推荐答案

密钥没有经过重新排序或重新编号.只需删除unset()键，其他键就会保留.

The keys are not shuffled or renumbered. The unset() key is simply removed and the others remain.

$a = array(1,2,3,4,5);
unset($a[2]);
print_r($a);

Array
(
    [0] => 1
    [1] => 2
    [3] => 4
    [4] => 5
)

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