Implementation of multidimensional array sorting using array_multisort() function in PHP

There are many ways to sort arrays in PHP. This article will share with you the implementation of multi-dimensional array sorting using the array_multisort() function in PHP, and the sorting of multi-dimensional arrays through custom functions.

Use PHP's own array_multisort function to sort

<?php
    $data = array();
    $data[] = array(&#39;volume&#39; => 67, &#39;edition&#39; => 2);
    $data[] = array(&#39;volume&#39; => 86, &#39;edition&#39; => 1);
    $data[] = array(&#39;volume&#39; => 85, &#39;edition&#39; => 6);
    $data[] = array(&#39;volume&#39; => 98, &#39;edition&#39; => 2);
    $data[] = array(&#39;volume&#39; => 86, &#39;edition&#39; => 6);
    $data[] = array(&#39;volume&#39; => 67, &#39;edition&#39; => 7);
    // 取得列的列表
    foreach ($data as $key => $row)
    {
        $volume[$key]  = $row[&#39;volume&#39;];
        $edition[$key] = $row[&#39;edition&#39;];
    }
    array_multisort($volume, SORT_DESC, $edition, SORT_ASC, $data);
    print_r($data);
?>

Output results:

Array
(
    [0] => Array
        (
            [volume] => 98
            [edition] => 2
        )
    [1] => Array
        (
            [volume] => 86
            [edition] => 1
        )
    [2] => Array
        (
            [volume] => 86
            [edition] => 6
        )
    [3] => Array
        (
            [volume] => 85
            [edition] => 6
        )
    [4] => Array
        (
            [volume] => 67
            [edition] => 2
        )
    [5] => Array
        (
            [volume] => 67
            [edition] => 7
        )
)

There are also more detailed instructions about array_multisort official documents

2. Custom function sorting 1

<?php
    $data = array();
    $data[] = array(&#39;volume&#39; => 67, &#39;edition&#39; => 2);
    $data[] = array(&#39;volume&#39; => 86, &#39;edition&#39; => 1);
    $data[] = array(&#39;volume&#39; => 85, &#39;edition&#39; => 6);
    $data[] = array(&#39;volume&#39; => 98, &#39;edition&#39; => 2);
    $data[] = array(&#39;volume&#39; => 86, &#39;edition&#39; => 6);
    $data[] = array(&#39;volume&#39; => 67, &#39;edition&#39; => 7);
    // 取得列的列表
    foreach ($data as $key => $row)
    {
        $volume[$key]  = $row[&#39;volume&#39;];
        $edition[$key] = $row[&#39;edition&#39;];
    }
    $ret = arraySort($data, &#39;volume&#39;, &#39;desc&#39;);
    print_r($ret);
    /**
     * @desc arraySort php二维数组排序 按照指定的key 对数组进行排序
     * @param array $arr 将要排序的数组
     * @param string $keys 指定排序的key
     * @param string $type 排序类型 asc | desc
     * @return array
     */
    function arraySort($arr, $keys, $type = &#39;asc&#39;) {
        $keysvalue = $new_array = array();
        foreach ($arr as $k => $v){
            $keysvalue[$k] = $v[$keys];
        }
        $type == &#39;asc&#39; ? asort($keysvalue) : arsort($keysvalue);
        reset($keysvalue);
        foreach ($keysvalue as $k => $v) {
           $new_array[$k] = $arr[$k];
        }
        return $new_array;
    }
?>

Output result:

Array
(
    [3] => Array
        (
            [volume] => 98
            [edition] => 2
        )
    [4] => Array
        (
            [volume] => 86
            [edition] => 6
        )
    [1] => Array
        (
            [volume] => 86
            [edition] => 1
        )
    [2] => Array
        (
            [volume] => 85
            [edition] => 6
        )
    [5] => Array
        (
            [volume] => 67
            [edition] => 7
        )
    [0] => Array
        (
            [volume] => 67
            [edition] => 2
        )
)

One difference between this custom function and the system function is that the custom function only Supports sorting for a certain key. If you want to support sorting for multiple keys, you need to execute it multiple times; The system function array_multisort can process multiple keys at once and specify multiple sorting rules. The system function is quite powerful. It is recommended to use the system function. After all, it is implemented at the bottom of C Yes, this is just an example of how to sort an array through a custom function. Of course, this custom function can also be expanded to support more sorting rules. Used in scenarios such as rankings, leaderboards, results, etc. There are still a lot of them.

3. Custom function sorting 2

The following function sorts a given two-dimensional array according to the specified key value. Let’s look at the function definition first:

function array_sort($arr,$keys,$type='asc'){ 
 $keysvalue = $new_array = array();
 foreach ($arr as $k=>$v){
  $keysvalue[$k] = $v[$keys];
 }
 if($type == 'asc'){
  asort($keysvalue);
 }else{
  arsort($keysvalue);
 }
 reset($keysvalue);
 foreach ($keysvalue as $k=>$v){
  $new_array[$k] = $arr[$k];
 }
 return $new_array; 
}

It can sort the two-dimensional array according to the specified key value, and can also specify the ascending or descending sorting method (the default is ascending order). Usage example:

$array = array(
 array('name'=>'手机','brand'=>'诺基亚','price'=>1050),
 array('name'=>'笔记本电脑','brand'=>'lenovo','price'=>4300),
 array('name'=>'剃须刀','brand'=>'飞利浦','price'=>3100),
 array('name'=>'跑步机','brand'=>'三和松石','price'=>4900),
 array('name'=>'手表','brand'=>'卡西欧','price'=>960),
 array('name'=>'液晶电视','brand'=>'索尼','price'=>6299),
 array('name'=>'激光打印机','brand'=>'惠普','price'=>1200)
);
$ShoppingList = array_sort($array,'price');
print_r($ShoppingList);

The above is the $array The two-dimensional array is sorted from low to high according to 'price'.

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Php array sorting and multi-dimensional array sorting

php one-dimensional array sorting and multi-dimensional array sorting

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