How to reverse array in PHP?

Question

I have the following array:

Array ( [2294] => 1 [2292] => 1 [2296] => 1 )

How can I reverse it to

Array ( [2296] => 1 [2292] => 1 [2294] => 1 )

TRIED array_reverse() but didn't work. What I am missing?

$array = array_reverse($array); // did not work

EDIT: I do not want numeric (order sort) I just need to reverse bottom keys to top, and vice versa

How exactly did u try the array_reverse function?

deW1
– deW1

2013-12-21 12:31:23 +00:00
Commented Dec 21, 2013 at 12:31 — deW1
– deW1, Commented Dec 21, 2013 at 12:31
read about preserve_keys in array_reverse

Viacheslav Kondratiuk
– Viacheslav Kondratiuk

2013-12-21 12:31:26 +00:00
Commented Dec 21, 2013 at 12:31 — Viacheslav Kondratiuk
– Viacheslav Kondratiuk, Commented Dec 21, 2013 at 12:31
I hope you didn't try to create an array with that code.

Hector Ordonez
– Hector Ordonez

2013-12-21 12:33:38 +00:00
Commented Dec 21, 2013 at 12:33 — Hector Ordonez
– Hector Ordonez, Commented Dec 21, 2013 at 12:33

Amal · Accepted Answer · 2013-12-21 12:32:20Z

4

You need to set the preserve_keys parameter to TRUE:

$result = array_reverse($array, TRUE);
print_r($result);

Output:

Array
(
    [2296] => 1
    [2292] => 1
    [2294] => 1
)

Demo.

answered Dec 21, 2013 at 12:32

Amal

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Comments

Roopendra · Accepted Answer · 2013-12-21 12:53:16Z

2

Yes You can do it by krsort in php. As you need to sort based on key

    $array = array( 2294 => 1, 2292 => 1, 2296 => 1 );
    krsort($array);

    print_r($array)

Output:-

Array
(
    [2296] => 1
    [2294] => 1
    [2292] => 1
)

Edit:- You can also achieve by set the preserve_keys parameter to TRUE in array_reverse()

   $array = array_reverse($array, TRUE);
   print_r($array);

Working Demo

edited Dec 21, 2013 at 12:53

answered Dec 21, 2013 at 12:32

Roopendra

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Comments

stUrb · Accepted Answer · 2013-12-21 12:32:11Z

0

You have to sort on the key: look at this table

You need the ksort() or krsort() functions

answered Dec 21, 2013 at 12:32

stUrb

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1 Comment

user2780294 Over a year ago

I do not want numeric (order sort) I just need to reverse bottom keys to top, and vice versa

Nathan Dawson · Accepted Answer · 2013-12-21 12:32:47Z

0

Try

$array = array( 2294 => 1, 2292 => 1, 2296 => 1 );
$reversed = array_reverse( $array, true );

answered Dec 21, 2013 at 12:32

Nathan Dawson

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