CODEWITHSUNDEEP
phparrayssorting
Stwn
Stwn

Reputation: 1

Synchronously sort one array by sorting another array

How do I create a PHP function that will order/sort an array by desired order, based on its key?

The array will contain string or numeric value, for example I have:

array = A,B,C,D,E,F

I would like to change the array based on its key so create

create_array_index(5,2,4,1,3,0) will show array F,C,E,B,D,A create_array_index(0,2,4,1,3,5) will show array A,C,E,B,D,F

I know, I can access the value manually ex : $array[5],$array[2],... and so on, but it will take a lot of time. Is there any function for this?

Upvotes: 0

Views: 568

Answers (4)

Wh1T3h4Ck5
Wh1T3h4Ck5

Reputation: 8509

There are few ways using some php sort functions (like other guys already sugessted), this is another short way how to do this job.

function sortArrayByKeys()

function sortArrayByKey($keystring, $origarray) {
  $res = array();
  $keys = explode(',', $keystring);
  foreach ($keys as $key) $res[] = $origarray[$key];
  return $res;
  }

test:

$original_array = array('A', 'B', 'C', 'D', 'E', 'F');

$sort_pattern = '5,2,4,1,3,0';
$new_array = sortArrayByKey($sort_pattern, $original_array);
echo "$sort_pattern => " . join(',', $new_array) . "<br />\n";

$sort_pattern = '0,2,4,1,3,5';
$new_array = sortArrayByKey($sort_pattern, $original_array);
echo "$sort_pattern => " . join(',', $new_array) . "<br />\n";

$sort_pattern = '5,4,3,2,1,0';
$new_array = sortArrayByKey($sort_pattern, $original_array);
echo "$sort_pattern => " . join(',', $new_array) . "<br />\n";

$sort_pattern = '0,5,4,2,1,3';
$new_array = sortArrayByKey($sort_pattern, $original_array);
echo "$sort_pattern => " . join(',', $new_array);

output:

5,2,4,1,3,0 => F,C,E,B,D,A
0,2,4,1,3,5 => A,C,E,B,D,F
5,4,3,2,1,0 => F,E,D,C,B,A
0,5,4,2,1,3 => A,F,E,C,B,D

Cheers ;)

Upvotes: 1

ScoRpion
ScoRpion

Reputation: 11474

There Are a number of array functions in Php and They are all discussed on PHP Official websites. As for I understand you are looking for ksort (Sort Array By keys) and krsort (Sort Array By Keys In Reverse). Please Check them on the given links. And try it yourself.. Goodluck

You can also create your own custom function to do the required job and use it anytime within your application if you feel ksort and krsort are not flexible or accurate to your requirement.

Upvotes: 0

KMKMAHESH
KMKMAHESH

Reputation: 150

Function ksort() is the best while you use the sorting by key.

Upvotes: 1

janenz00
janenz00

Reputation: 3310

Check the different sort options available in PHP.

Sort based on array keys - https://www.php.net/ksort

You can also sort based on your own comparison function - https://www.php.net/manual/en/function.uksort.php

Upvotes: 0

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