从数组中获取三个最高值

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.

Answer 1

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

Answer 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.

Answer 3

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

Would produce:

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

You can find out more about it here .

Answer 4

<?php 

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

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

?>

Answer 5

I would try:

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

Answer 6

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
)