foreach 是否保证在 php 中按数组顺序迭代? [英] Is foreach guaranteed to iterate in the array order in php?

问题描述

当一个数组被传递给 foreach 时，是否保证输出顺序与输入相同?我知道在某些语言中无法保证输出顺序，因为每个元素都是同时处理的.

When an array is passed to foreach is the output order guaranteed to be the same as the input? I know in some languages that the output order is not guaranteed since each element is processed at the same time.

例如，我将一个已排序的数组传递给 foreach 以写入文件.我想确保数组将在输出文件中排序.

For example, I'm passing a sorted array to foreach to write to a file. I want to be sure that the array will be sorted in the output file.

推荐答案

是的...无论你给 foreach 提供什么顺序，它都会以相同的顺序迭代.在您的情况下，array 将在输出文件中排序.

Yes ...whatever order you will give to foreach it will iterate in same orders. And in your case array will be sorted in the output file.

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