为 PHP 数组的每一项添加前缀 [英] Add a prefix to each item of a PHP array

问题描述

我有一个 PHP 数字数组，我想在它前面加上一个减号 (-).我认为通过使用爆炸和内爆是可能的，但我对 php 的了解实际上是不可能做到的.任何帮助将不胜感激.

I have a PHP array of numbers, which I would like to prefix with a minus (-). I think through the use of explode and implode it would be possible but my knowledge of php is not possible to actually do it. Any help would be appreciated.

基本上我想从这个开始:

Essentially I would like to go from this:

$array = [1, 2, 3, 4, 5];

为此:

$array = [-1, -2, -3, -4, -5];

有什么想法吗?

推荐答案

简单:

foreach ($array as &$value) {
   $value *= (-1);
}
unset($value);

除非数组是字符串:

foreach ($array as &$value) {
    $value = '-' . $value;
}
unset($value);

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