PHP sort an array based on another array [duplicate]

Question

I have the following scenario

$elementsInPairs = ["xyz","xxx","yyy","zzz"];
$valuesInPair =[4,2,3,1];

and i need to sort the second array which would give me

[1,2,3,4]

which i can do by

sort($valuesInPair)

but i need the same to happen in first array as well, based on the sorting of the second array

["zzz","xxx","yyy","xyz"];

EDIT As i had to fix it urgently, i guess i wasn't able to share more information, and the question seemed vague

basically the idea is that i have two sets of arrays, same number of elements in all cases, and they are linked to each other, The second array is a set of order IDs. and first array is set of names, so in the above example, i have

4 relates to xyz
2 relates to xxx
3 relates to yyy
1 relates to zzz

So i need to sort based on IDs, and have the same order reflect in the first array as well,

so the final result would be,

["zzz","xxx","yyy","xyz"];

which is sorted based on

[1, 2, 3, 4];

Hopefully this clears things above

Show us what you tried, please. This is not a code-writing service, you need to make an attempt yourself. — C3roe
– C3roe, Commented Jun 23, 2020 at 10:02
Do you mean ["zzz","yyy","xxx","xyz"]; so like reversing the array? Because I dont see a pattern in your "order" for the array with letters. xxx and yyy comes before zzz if you order by alphabetic, so what is the idea behind the ordering? — Patrick
– Patrick, Commented Jun 23, 2020 at 10:17

Abdullah Warraich · Accepted Answer · 2020-06-29 10:36:28Z

1

You can achieve this by using array_multisort method.

array_multisort($valuesInPair, SORT_ASC, $elementsInPair);

answered Jun 29, 2020 at 10:36

Abdullah Warraich

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Comments

Natha Odedara · Accepted Answer · 2020-06-23 10:21:10Z

0

Use this below code, this does exactly what you're looking for.

$elementsInPairs = ["xyz","xxx","yyy","zzz"];
$valuesInPair =[4,2,3,1];

$data = array_combine($elementsInPairs,$valuesInPair);
asort($data);

$dumpdata = [];

foreach($data as $x => $x_value) {
    $dumpdata[] = $x;
}

print_r($dumpdata);

I hope this helps you.

answered Jun 23, 2020 at 10:21

Natha Odedara

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1 Comment

Nico Haase Over a year ago

How did you know that this does exactly what the OP is looking for?

Younes Zaidi · Accepted Answer · 2020-06-23 10:25:31Z

0

You kan do like this :

<?php

$elementsInPairs = ["xyz","xxx","yyy","zzz"];
$valuesInPair =[4,2,3,1];
//use [asort][1] - Sort an array in reverse order and maintain index association
asort($valuesInPair);
// and make a new array to sort elementsInPairs
$newelementsInPairs = array();
foreach($valuesInPair as $key=>$val){
    $newelementsInPairs[] = $elementsInPairs[$key];
}
print_r(implode(",",$valuesInPair)."\n");
print_r(implode(",",$newelementsInPairs));
/** Output

1,2,3,4
zzz,xxx,yyy,xyz

 **/

answered Jun 23, 2020 at 10:25

Younes Zaidi

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Comments

thirumal mani L · Accepted Answer · 2020-06-23 10:46:30Z

0

Hi please combine two array and sort

$newArray =array_combine($valuesInPair,$elementsInPairs);

then sort($newArray);

edited Jun 23, 2020 at 10:46

user8034901

answered Jun 23, 2020 at 10:18

thirumal mani L

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Nico Haase Over a year ago

This would produce a different array

user8034901 · Accepted Answer · 2020-06-23 10:51:34Z

0

You can use array_combine(), ksort() and array_values():

<?php

$elementsInPairs = ["xyz","xxx","yyy","zzz"];
$valuesInPair = [4,2,3,1];

$newArray = array_combine($valuesInPair, $elementsInPairs);
ksort($newArray);
$sortedElements = array_values($newArray);

print_r($sortedElements);

will output

Array
(
    [0] => zzz
    [1] => xxx
    [2] => yyy
    [3] => xyz
)

answered Jun 23, 2020 at 10:51

user8034901

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