Get three highest values from the array

Question

I want to get three highes values from my array, but it should be sorted properly by keys also.

I have this code:

<?php
$a = array(130, 1805, 1337);
arsort($a);
print_r($a);
?>

The output of the above is following:

Array
(
    [1] => 1805
    [2] => 1337
    [0] => 130
)

Its working fine, but I want it additionaly to sort its keys from the highest to the lowest value.

Example:

Array
(
    [2] => 1805
    [1] => 1337
    [0] => 130
)

To be clear: I want it be to sorted by the keys: array key number 2 will be always used for the highest value, array key number 0 will be always used for the lowest value.

How can I do that?

/let me know if you don't understand something.

Did any of the answers here correctly sorted by value and key? — Alix Axel
– Alix Axel, Commented Mar 30, 2012 at 21:07

deceze · Accepted Answer · 2012-03-30 01:07:16Z

8

rsort($array);
$top3 = array_reverse(array_slice($array, 0, 3));

answered Mar 30, 2012 at 1:07

deceze♦

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5 Comments

hohner Over a year ago

Just a note for @Cyclone, if you use array_slice as @deceze pointed out, it will only return the top 3 values. If you want to affect all values, leave it out.

Cyclone Over a year ago

@deceze Thank you ! :-) That was what I've looking for.

hohner Over a year ago

@deceze I wouldn't hold your breath, it's was probably more of an 'elevation through collateral downvoting' strategy... So sad

Alix Axel Over a year ago

Why not $top3 = array_slice($array, -3);?

deceze Over a year ago

@Alix True, that's a nice solution as well when combined with sorting the other way.

MacMac · Accepted Answer · 2012-03-30 01:06:59Z

2

You should use array_reverse for this.

<?php
$a = array(130, 1805, 1337);
arsort($a);
print_r(array_reverse($a));
?>

Easily accessed by $a[0], $a[1], $[2] to get your highest values.

answered Mar 30, 2012 at 1:06

MacMac

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Comments

hohner · Accepted Answer · 2012-03-30 01:11:40Z

1

$a = array(130, 1805, 1337);
arsort($a);
array_reverse($a);

Would produce:

Array
(
    [2] => 1807
    [1] => 1337
    [0] => 130
)

You can find out more about it here.

answered Mar 30, 2012 at 1:11

hohner

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1 Comment

animuson Over a year ago

Just a note: array_reverse() doesn't change the original array, it returns the reversed array, so you have to catch it in a variable or it's useless.

Ezequiel Muns · Accepted Answer · 2012-03-30 01:17:30Z

0

I would try:

<?php
$a = array(130, 1805, 1337); 
arsort($a);
$a = array_reverse($a);

answered Mar 30, 2012 at 1:17

Ezequiel Muns

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Comments

Alix Axel · Accepted Answer · 2012-03-30 21:04:14Z

0

I couldn't get the output you described with any of the answers already posted (tested via IDEOne.com).

Here is my solution (demo):

$a = array(130, 1805, 1337);

$keys = array_keys($a); rsort($keys, SORT_NUMERIC);
$values = array_values($a); rsort($values, SORT_NUMERIC);

$a = array_combine(array_slice($keys, 0, 3), array_slice($values, 0, 3));

print_r($a);

Output:

Array
(
    [2] => 1805
    [1] => 1337
    [0] => 130
)

answered Mar 30, 2012 at 21:04

Alix Axel

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Comments

Hanifeoglu · Accepted Answer · 2013-11-11 21:32:02Z

0

<?php 

$array = array(130, 1805, 1337);
sort($array);
for ($i=0; $i <= count($array)-1; $i++)

      $arr[]=$array[$i];
      print_r($arr);

?>

answered Nov 11, 2013 at 21:32

Hanifeoglu

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