CODEWITHSUNDEEP
phparrayssortingnumericassociative
Tommz Tenodi
Tommz Tenodi

Reputation: 15

How to sort php array if your left place in array is for keys and right for values?

I had problem with array_push so I needed to make numeric array instead of associative. But, as I was doing it, I always pushed 2 values:

  1. first was the key to search (ID of object in table)
  2. second was some value that was given to object with ID.

So if we would have, let's say, 4 objects with ID's: 1,2,3,4 and we would have given them some values: 20, 50, 40, 30 (going from the lowest ID), my array looks like:

1, 20, 2, 50, 3, 40, 4, 30.

How can I sort my array from the highest value? The result should be array which looks like:

2, 50, 3, 40, 4, 30, 1, 20.

Upvotes: 0

Views: 145

Answers (1)

KingCrunch
KingCrunch

Reputation: 131891

PHP support nested (multi-dimensional) arrays

$array = [
    [1, 20],
    [2, 50],
    [3, 40],
    [4, 30]
];

Now you can easly sort it

usort(
    $array,
    function ($left, $right) { return $right[1] - $left[1]; }
);
var_dump($array);

Depending on what this ID and value is, you may consider creating a class instead, especially when there exists other values associated with this ID.

Update: Oh, and because you mentioned

first was the key to search (ID of object in table) and second was some value that was given to object with ID.

When you are talking about database tables, let the database sort for you ;)

ORDER BY `valueColumn` DESC

Upvotes: 1

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