Sorting Two Arrays

terfle

I have two arrays like this

Array1
(
[0] => 34
[1] => 45
[2] => 25
[3] => 13
)

Array2
(
[0] => 3
[1] => 2
[2] => 2
[3] => 1
)

I would like to sort on array 2 while keeping assosiation between the two arrays. What is the easiest way to do this?

Thanks for your help.

rohithmr

wuddup terfle,
Well I can hink of a solution, but it seems way too simple. So holla bac if i misunderstood u.

<?php
$arr1 = Array( 
0 => 34, 
1 => 45,
2 => 25, 
3 => 13 
) ;

$arr2 = Array( 
0 => 3, 
1 => 2,
2 => 2,
3 => 1 
) ;

asort($arr2);

echo '<pre>';
print_r($arr2);
echo '</pre>';


?>

The solution is asort

terfle

rohithmr,

You are right, that would sort array2, but the problem is then it would loose association between the two arrays. Because the first value in array1 is associated to the 1st value in array2 and so on.

🙂

rohithmr

Ohk I wasnt sure how you associted the arrays.

Well the method does preserve the association between the arrays but not the way u think. The elemens in the first array is associated with the elements in the second array using the same index.

So the first value of 34 in the first array is associated to value 3 in the second array cuz they both have the index 0.

That way, even after sorting the association is not lost. Your way of associating nth element in the first array to nth element in the second array is not recommended cuz its VERY easy to screw up (eg: if both arrays dunth ave the same number of elements).

Tell me if u get my point.

terfle

Your way of associating nth element in the first array to nth element in the second array is not recommended cuz its VERY easy to screw up

What would be the correct way to associate this data then?

rohithmr

The most commonly used way to associate arrays is having a common index. This is usually the case when you have relativly small amount to data in the array.

So I would recommend that you structure ur arrays so that the elements that need to be associated have the same index. Like I stated in my previous post.

terfle

Well the method does preserve the association between the arrays but not the way u think. The elemens in the first array is associated with the elements in the second array using the same index.

Ok, I understand what you are saying here...it just took me a second. Thanks for the help.