PHP - Problem with sorting my multidimensional array?

Question

I have a multidimensional array that looks like this:

array:3 [
  0 => array:2 [
    "titre" => "Un package test"
    "nbDDL" => "3"
  ]
  1 => array:2 [
    "titre" => "retest"
    "nbDDL" => "1"
  ]
  2 => array:2 [
    "titre" => "ytjrtj"
    "nbDDL" => "1"
  ]
]

I would like to sort it by ASC or DESC order (depending on a variable passed in function parameter) with the nbDDL.

I looked at the method array_multisort() but I can not put it in place.

I work under Symfony 3. Currently, I have:

if($ordreTri == "ASC")
{
    $liste = array_multisort("nbDDL", ASC);
}

Thanks for your help !

Post code as text instead of text in images so people can copy paste easily — B001ᛦ
– B001ᛦ, Commented Apr 25, 2019 at 10:27

Qirel · Accepted Answer · 2019-04-25 10:36:20Z

2

There's a few different ways of doing this - you can introduce your own custom sort by using usort() and the spaceship operator <=>, but you can use array_multisort(), you just have to combine it with array_column().

You can sort the array by first fetching all the nbDDLs. Then use that as the sorting-array in array_multisort(), and sort by ascending order (SORT_ASC). Apply that to $array, and you're done!

// By reference, $array is changed
array_multisort(array_column($array, "nbDDL"), SORT_ASC, $array);

This is done by reference, so you don't need to assign it to a variable. The return-value of array_multisort() is a boolean, which means that if you assign it as

// By reference - $result is bool
$result = array_multisort(array_column($array, "nbDDL"), SORT_ASC, $array);

Then $result is either true or false, but not the sorted array.

Live demo at https://3v4l.org/9JYe5
PHP.net on array_multisort()

answered Apr 25, 2019 at 10:36

Qirel

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1 Comment

eronn Over a year ago

Wow, great, thanks for this help, and the explanations that go with it! Thank you so much !

Pintu Kumar · Accepted Answer · 2019-04-25 10:39:07Z

1

You can try like below:

$data = [
    ['a' => 'a', 'order' => 1],
    ['b' => 'b', 'order' => 3],
    ['c' => 'c', 'order' => 1]
];

array_multisort(array_column($data, 'order'), SORT_DESC, SORT_NUMERIC, $data);

print_r($data);

answered Apr 25, 2019 at 10:39

Pintu Kumar

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Comments

Mitesh Vasava · Accepted Answer · 2019-04-25 10:43:43Z

You can do as following way:

function array_sort($array, $on, $order=SORT_ASC){

    $new_array = array();
    $sortable_array = array();

    if (count($array) > 0) {
        foreach ($array as $k => $v) {
            if (is_array($v)) {
                foreach ($v as $k2 => $v2) {
                    if ($k2 == $on) {
                        $sortable_array[$k] = $v2;
                    }
                }
            } else {
                $sortable_array[$k] = $v;
            }
        }

        switch ($order) {
            case SORT_ASC:
                asort($sortable_array);
                break;
            case SORT_DESC:
                arsort($sortable_array);
                break;
        }

        foreach ($sortable_array as $k => $v) {
            $new_array[$k] = $array[$k];
        }
    }

    return $new_array;
}

Use function as like:

$list = array(
   array( 'type' => 'suite', 'name'=>'A-Name'),
   array( 'type' => 'suite', 'name'=>'C-Name'),
   array( 'type' => 'suite', 'name'=>'B-Name')
 );

$list = array_sort($list, 'name', SORT_ASC);

hizuki0399 · Accepted Answer · 2022-12-03 11:04:30Z

0

normally, you can use array_multisort to sort the array, but somehow it's weird thatin php7.4 it returns boolean (true or false) instead of sorted array like in php 5. I mean, a sorted array is what we actually need, not the boolean values.

answered Dec 3, 2022 at 11:04

hizuki0399

1

2 Comments

Community Over a year ago

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ahuemmer Over a year ago

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