Как отсортировать массив по конкретному ключу?

Question

[Роман Говоров]

Как отсортировать массив по ключу PRICE ?

Array
(
    [0] => Array
        (
            [INFO] => Array
                (
                    [ID] => 1
                    [NAME] => NAME_1
                    [DESC] => DESC_1
                )

            [PRICE] => 0
        )

    [1] => Array
        (
            [INFO] => Array
                (
                    [ID] => 2
                    [NAME] => NAME_2
                    [DESC] => DESC_2
                )

            [PRICE] => 500
        )
    [2] => Array
        (
            [INFO] => Array
                (
                    [ID] => 3
                    [NAME] => NAME_3
                    [DESC] => DESC_3
                )

            [PRICE] => 1
        )
)

Answer 1

[Максим]

Пример из документации:

$people = array( 
array("name"=>"Bob","age"=>8,"colour"=>"red"), 
array("name"=>"Greg","age"=>12,"colour"=>"blue"), 
array("name"=>"Andy","age"=>5,"colour"=>"purple")); 

var_dump($people); 

$sortArray = array(); 

foreach($people as $person){ 
    foreach($person as $key=>$value){ 
        if(!isset($sortArray[$key])){ 
            $sortArray[$key] = array(); 
        } 
        $sortArray[$key][] = $value; 
    } 
} 

$orderby = "name"; //change this to whatever key you want from the array 

array_multisort($sortArray[$orderby],SORT_DESC,$people); 

var_dump($people);

Output from first var_dump: 

[0]=> 
  array(3) { 
    ["name"]=> 
    string(3) "Bob" 
    ["age"]=> 
    int(8) 
    ["colour"]=> 
    string(3) "red" 
  } 
  [1]=> 
  array(3) { 
    ["name"]=> 

    string(4) "Greg" 
    ["age"]=> 
    int(12) 
    ["colour"]=> 
    string(4) "blue" 
  } 
  [2]=> 
  array(3) { 
    ["name"]=> 
    string(4) "Andy" 
    ["age"]=> 
    int(5) 
    ["colour"]=> 

    string(6) "purple" 
  } 
} 

Output from 2nd var_dump: 

array(3) { 
  [0]=> 
  array(3) { 
    ["name"]=> 
    string(4) "Greg" 
    ["age"]=> 
    int(12) 
    ["colour"]=> 
    string(4) "blue" 
  } 
  [1]=> 
  array(3) { 
    ["name"]=> 

    string(3) "Bob" 
    ["age"]=> 
    int(8) 
    ["colour"]=> 
    string(3) "red" 
  } 
  [2]=> 
  array(3) { 
    ["name"]=> 
    string(4) "Andy" 
    ["age"]=> 
    int(5) 
    ["colour"]=> 

    string(6) "purple" 
  }

Answer 2

[nokimaro]

Как отсортировать многомерный массив в php?

<?php
array_multisort(array_column($array, 'PRICE'), SORT_ASC, $array);

Answer 3

[Дмитрий]

https://www.php.net/manual/ru/function.usort.php
https://github.com/Compolomus/Collection/blob/mast... вот такую штуку делал

Answer 4

[Андрей]

Попробуй как-то так

usort($array, function($a, $b) {
    if ($a['PRICE'] == $b['PROCE']) {
        return 0;
    }
    return ($a['PRICE'] < $b['PRICE']) ? -1 : 1;
});

$array - твой массив.