将 PHP 数组中的值移动到数组的开头 [英] Move Value in PHP Array to the Beginning of the Array

问题描述

我有一个类似这样的 PHP 数组:

I have a PHP array similar to this:

0 => "red",
1 => "green",
2 => "blue",
3 => "yellow"

我想将黄色移动到索引 0.我该怎么做?

I want to move yellow to index 0. How do I do this?

我的问题是如何将这些元素中的任何一个移动到开头?我如何将绿色移动到索引 0，或蓝色移动到索引 0?这个问题不仅仅关于将最后一个元素移到开头.

My question is how do I move any one of these elements to the beginning? How would I move green to index 0, or blue to index 0? This question is not exclusively about moving the last element to the beginning.

推荐答案

这对我来说似乎是最简单的方法.您可以将任何位置移动到开头，而不仅仅是最后一个(在本例中，它会将蓝色移动到开头).

This seems like the simplest way to me. You can move any position to the beginning, not just the last (in this example it moves blue to the beginning).

$colours = array("red", "green", "blue", "yellow");

$movecolour = $colours[2];
unset($colours[2]);
array_unshift($colours, $movecolour);

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