PHP foreach - Loop Through Array in Opposite Order

Question

Is there a way to loop through a foreach loop opposite to the way it normally goes? For example, I have an unknown amount of files in the $_FILES variable ($_FILES['file'], $_FILES['file2'], $_FILES['3'] etc...). Using this code

foreach($_FILES as $i)

$i will output as file3, file2, file. I need it to output file, file2, file3.

Emil Vikström · Accepted Answer · 2012-09-09 19:12:17Z

6

array_reverse should do the trick:

foreach(array_reverse($_FILES) as $i)

answered Sep 9, 2012 at 19:12

Emil Vikström

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arkascha · Accepted Answer · 2012-09-09 19:12:53Z

4

foreach(array_reverse($_FILES) as $i)

answered Sep 9, 2012 at 19:12

arkascha

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Jezen Thomas · Accepted Answer · 2016-06-24 12:07:48Z

3

Here's another way without using a for:

$i = count($_FILES);
while ($i-->0)
    // Do stuff

I think it's ever so slightly prettier.

Some years later, I look back at this and I frown.

edited Jun 24, 2016 at 12:07

answered Sep 9, 2012 at 19:20

Jezen Thomas

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6 Comments

Jason McCreary Over a year ago

Maybe if you added some spaces and did pre-decrement :)

Jezen Thomas Over a year ago

No no no, I like it better this way. It works, and it looks like an arrow. That alone makes it better. It's sort of the hipster loop. It's a bit obscure; you probably haven't heard of it. It's much more poetic than those other mainstream for loops.

Jason McCreary Over a year ago

You're totally right. I haven't heard of writing obscure code that is difficult to read for future developers. Very hip man!

Emil Vikström Over a year ago

This will only work if the array is numerically indexed, which it doesn't appear to be in the question. It is also hard to understand and therefore not easily maintainable, which in itself deserves a downvote.

Lukas Over a year ago

I used a modified version of this.

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