多维数组帮助 - 以及关于数组的其他问题 [英] Multi-Dimensional Arrays Help - And Other Questions on Arrays

问题描述

出于某种原因，我总是很难理解数组，因为它们与php和数据库有关。我理解关联数组就好了但是当有多维数组时，我有点不会。


我已经讨论了几个不同的例子，但它们是有限的。我能够找到一条我想要解析的代码并提出问题，这样我就可以更好地理解。

展开 | 选择 | Wrap | 行号

解决方案

首先，发布的代码应该给你很多错误通知（键被设置为常量，我怀疑是有意的）


如果你熟悉数学，想象数组作为矩阵，你可以用适当的索引（又称键）值访问每个元素（比如

array

I]

For some reason, I have always had a hard time understanding arrays as they pertain to php and databases. I understand associative arrays just fine but when there are multidimensional arrays, I kinda don''t.

I have gone over a few different examples but they were limited. I was able to find one piece of code that I would like to disect and ask questions about so I can gain a better understanding.

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解决方案

firstly, the posted code should give you quite a bunch of error notices (the keys are set as constants, which I doubt are intended)

if you''re familiar with Maths, imagine arrays as matrices where you can access each element with the appropriate index (aka key) values (like

array

i]

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