PHP: how to sort an array by keys numerically?

Question

Even though I have read the PHP documentation and this looks like to be a FAQ, it's still giving me some headache.

I have an array like this which holds the months of the year:

[12] => december
 [4] => april
 [3] => march
 [6] => june
 [7] => july
[10] => october

...and so on

The order is not as it should be. I want to reorder the keys numerically. I can swap the keys with values if I want, but while each numerical value will match the corresponding month, they will never be in order. So I thought of putting these in order via PHP.

I have tried with $calendar = ksort( $myarray );

But If I try to print $calendar, I will only get bool=true or array with a single key and "1" as value... I was planning to use the ksort result in a foreach later, but I can't.

What I'm droing wrong?

Mihai Iorga · Accepted Answer · 2012-09-05 12:36:16Z

4

No .. just use:

ksort($myarray);
print_r($myarray)

Codepad example

ksort() sorts an array by key, maintaining key to data correlations, returns TRUE on success or FALSE on failure, if you associate the $calendar with ksort() you will have what ksort returns.

edited Sep 5, 2012 at 12:36

answered Sep 5, 2012 at 12:30

Mihai Iorga

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1 Comment

unfulvio Over a year ago

thanks, I just got that - I didn't understand what the PHP manual was trying to say and assumed I had to store the sorted array into a variable

JackLB · Accepted Answer · 2012-11-13 07:26:27Z

0

ksort($arr);
foreach ($arr as $key => $val) 
{ 
   echo "$key = $val\n";
}

answered Nov 13, 2012 at 7:26

JackLB

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