Sorting an array where keys are timestamps by reverse order?

Question

Is krsort() function suitable for sorting (by reverse order) an array where keys are timestamps? Is there (maybe) another "standard" function for doing this?

$arr = array(); $arr[1327305600] = '87718'; $arr[1327132800] = '87798'; // Dunno if SORT_NUMERIC is really necessary? krsort($arr, SORT_NUMERIC);

Wesley van Opdorp · Accepted Answer · 2012-01-25 10:06:59Z

1

Yes it is perfectly suitable, you should use the SORT_NUMERIC flag. It isn't required as regular sorting will take integers first - but it could prevent future problems.

answered Jan 25, 2012 at 10:06

Wesley van Opdorp

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2 Comments

gremo Over a year ago

What kind of "future problems"? Thanks.

Wesley van Opdorp Over a year ago

Someone making modifications to other parts of your application that could influence your sorting by automaticly relying on natural sorting.

Susam Pal · Accepted Answer · 2012-01-25 10:19:07Z

krsort()is fine if the timestamps are the number of seconds (or milliseconds) since an epoch, say, the Unix Epoch (January 1 1970 00:00:00 GMT). SORT_NUMERIC is not necessary if you are sure that all keys are Unix timestamps.

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