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up vote 2 down vote favorite

I have an array of numbers from descending order. When I add to this array, I add to the end and then do natsort($times). $times then looks like this (obtained by print_r):

Array
(
    [0] => 0.01
    [1] => 0.02
    [2] => 0.05
    [3] => 0.08
    [7] => 0.10   <-- Just added and natsorted
    [4] => 0.11
    [5] => 0.14
    [6] => 0.21
)

However, I wish to reassign all the keys so that the just-added 0.10 is array index 4 making it easy to see what place the new time is in. ie "your ranking is $arrayindex+1"

Besides copying this whole array into a new array to get new keys, is there a better way?

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3 Answers

up vote 4 down vote accepted

You can use sort [docs] with SORT_NUMERIC, instead of natsort:

sort($times, SORT_NUMERIC);

Unlike natsort, it re-indexes the array.

There is no built in way to re-index the array after/while sorting. You could also use array_values [docs] after sorting with natsort:

$times = array_values($times);

This is copying the array though.

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Why should he? Is this faster? –  Phpdna Aug 7 '11 at 9:13
 
@Jitamaro: What do you mean? I mean he should use sort instead of natsort. This will be faster (well, depends on what array_values is doing under the hood, but it is likely that calling only one method is faster than calling two). –  Felix Kling Aug 7 '11 at 9:14
 
sort($times, SORT_NUMERIC); –  Phpdna Aug 7 '11 at 9:18
 
@downvoter: Please explain. Thank you! –  Felix Kling Aug 7 '11 at 9:19
 
sort($times, SORT_NUMERIC); worked perfectly for me as an alternative to natsort –  Kevin Duke Aug 7 '11 at 9:21
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up vote 3 down vote

You can do this with array_values.

$times=array_values($times);
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up vote 2 down vote

usort reassigns array keys after sorting, use it with strnatcmp:

usort( $times, 'strnatcmp' );
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