PHP multidimensional array sorting implementation program code_PHP tutorial

Sorting arrays in PHP includes one-dimensional array sorting and multi-dimensional array sorting. Let me introduce in detail the specific methods of using PHP array sorting functions and custom functions to implement data sorting. ​

Single array sort

sort function sorts in ascending order

bool sort ( array &$array [, int $sort_flags= SORT_REGULAR ] )

The code is as follows

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代码如下	复制代码
$fruits = array("lemon", "orange", "banana", "apple"); sort($fruits); var_dump($fruits); ?>

$fruits = array("lemon", "orange", "banana", "apple");

sort($fruits);

var_dump($fruits);

?>

代码如下	复制代码
$fruits = array("lemon", "orange", "banana", "apple"); rsort($fruits);var_dump($fruits); ?>

-rsort descending order--

The code is as follows

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代码如下	复制代码
$arr = array(     'd' => array('id' => 5, 'name' => 1, 'age' => 7),     'b' => array('id' => 2,'name' => 3,'age' => 4),     'a' => array('id' => 8,'name' => 10,'age' => 5),     'c' => array('id' => 1,'name' => 2,'age' => 2) );

$fruits = array("lemon", "orange", "banana", "apple");

rsort($fruits);var_dump($fruits);

?>

For example, there is a multidimensional array:

代码如下	复制代码
// 取得列的列表 foreach ($data as $key => $row) {     $volume[$key]  = $row['volume'];     $edition[$key] = $row['edition']; }

Need to sort the age items in the two-dimensional array. You need to use PHP’s built-in function array_multisort(), array_multisort() requires an array containing columns, so use the following code to get the columns and then sort them.

The code is as follows	Copy code
// Get the column list foreach ($data as $key => $row) { $volume[$key] = $row['volume']; $edition[$key] = $row['edition']; }

// Sort the data in descending order according to volume and in ascending order according to edition
// Use $data as the last parameter, sort by common key
array_multisort($volume, SORT_DESC, $edition, SORT_ASC, $data);

The data collection is now sorted, and the results are as follows:
volume | edition
-------+--------
98 | 2
86 | 1
86 | 6
85 | 6
67 | 2
67 | 7

//Custom function:

The code is as follows

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function multi_array_sort($multi_array,$sort_key ,$sort=SORT_ASC)

代码如下

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function multi_array_sort($multi_array,$sort_key,$sort=SORT_ASC) {     if(is_array($multi_array))     {         foreach ($multi_array as $row_array)         {             if(is_array($row_array))             {                 $key_array[] = $row_array[$sort_key];             }             else             {                 return false;             }         }     }     else     {         return false;     }     array_multisort($key_array,$sort,$multi_array);     return $multi_array; }

{ If(is_array($multi_array)) { foreach ($multi_array as $row_array)             { If(is_array($row_array))                 {                    $key_array[] = $row_array[$sort_key];             }            else                 {                        return false;             } } } else {          return false; } Array_multisort($key_array,$sort,$multi_array); Return $multi_array; }

//处理
 
 

 代码如下

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print_r(multi_array_sort($arr,'age'));

代码如下

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print_r(multi_array_sort($arr,'age')); //输出  Array (     [c] => Array         (             [id] => 1             [name] => 2             [age] => 2         )       [b] => Array         (             [id] => 2             [name] => 3             [age] => 4         )       [a] => Array         (             [id] => 8             [name] => 10             [age] => 5         )       [d] => Array         (             [id] => 5             [name] => 1             [age] => 7         )   )

//输出

 Array

(
    [c] => Array         (

            [id] => 1

            [name] => 2             [age] => 2         )       [b] => Array         (             [id] => 2             [name] => 3             [age] => 4         )       [a] => Array         (

            [id] => 8             [name] => 10             [age] => 5

        )

      [d] => Array         (             [id] => 5             [name] => 1             [age] => 7         )   )

实际上真正在排序的时候还有很多方法可以使用，比如php的array数组自带的 arsort()，asort()，ksort()，krsort()，natsort()，natcasesort()，rsort()，usort()，array_multisort() 和 uksort()。 http://www.bkjia.com/PHPjc/445296.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/445296.htmlTechArticle在php中对数组排序包括一维数组排序与多维数组排序，下面我来详细介绍利用php数组排序函数与自定函数来实现数据排序的具体方法。 单数...