通过多个键对多维数组进行排序

83

我正在尝试通过多个键对多维数组进行排序，而且我不知道从哪里开始。我看了uasort，但不确定如何根据需要编写函数。

我需要按状态排序，然后按event_type排序，然后按日期排序。

我的数组如下所示：

    Array
(
    [0] => Array
        (
            [ID] => 1
            [title] => Boring Meeting
            [date_start] => 2010-07-30
            [time_start] => 06:45:PM
            [time_end] => 
            [state] => new-york
            [event_type] => meeting
        )

    [1] => Array
        (
            [ID] => 2
            [title] => Find My Stapler
            [date_start] => 2010-07-22
            [time_start] => 10:45:AM
            [time_end] => 
            [state] => new-york
            [event_type] => meeting
        )

    [2] => Array
        (
            [ID] => 3
            [title] => Mario Party
            [date_start] => 2010-07-22
            [time_start] => 02:30:PM
            [time_end] => 07:15:PM
            [state] => new-york
            [event_type] => party
        )

    [3] => Array
        (
            [ID] => 4
            [title] => Duct Tape Party
            [date_start] => 2010-07-28
            [time_start] => 01:00:PM
            [time_end] => 
            [state] => california
            [event_type] => party
        )
...... etc
php  arrays  sorting  multidimensional-array 
— attepted_nerd
source
1
…而您想如何排序？
— deceze
— 2012年

Answers:

181

你需要 array_multisort

$mylist = array(
    array('ID' => 1, 'title' => 'Boring Meeting', 'event_type' => 'meeting'),
    array('ID' => 2, 'title' => 'Find My Stapler', 'event_type' => 'meeting'),
    array('ID' => 3, 'title' => 'Mario Party', 'event_type' => 'party'),
    array('ID' => 4, 'title' => 'Duct Tape Party', 'event_type' => 'party')
);

# get a list of sort columns and their data to pass to array_multisort
$sort = array();
foreach($mylist as $k=>$v) {
    $sort['title'][$k] = $v['title'];
    $sort['event_type'][$k] = $v['event_type'];
}
# sort by event_type desc and then title asc
array_multisort($sort['event_type'], SORT_DESC, $sort['title'], SORT_ASC,$mylist);

从PHP 5.5.0开始：

array_multisort(array_column($mylist, 'event_type'), SORT_DESC,
                array_column($mylist, 'title'),      SORT_ASC,
                $mylist);

$mylist 就是现在：

array (
  0 => 
  array (
    'ID' => 4,
    'title' => 'Duct Tape Party',
    'event_type' => 'party',
  ),
  1 => 
  array (
    'ID' => 3,
    'title' => 'Mario Party',
    'event_type' => 'party',
  ),
  2 => 
  array (
    'ID' => 1,
    'title' => 'Boring Meeting',
    'event_type' => 'meeting',
  ),
  3 => 
  array (
    'ID' => 2,
    'title' => 'Find My Stapler',
    'event_type' => 'meeting',
  ),
)
— 抢
source
@Rob我很好奇您如何对date_start进行排序
— frazras
5
什么是“管道录音带派对”？
— gdaniel
对于PHP <5.5，有一个array_column功能为github.com/ramsey/array_column的polyfill。因此，有可能在旧版本的第二个代码片段中使用更优雅的方式。
— userlond
15

您可以使用usort。该$cmp_function参数可以是：

function my_sorter($a, $b) {
    $c = strcmp($a['state'], $b['state']);
    if($c != 0) {
        return $c;
    }

    $c = strcmp($a['event_type'], $b['event_type']);
    if($c != 0) {
        return $c;
    }

    return strcmp($a['date_start'], $b['date_start']);
}

对于PHP 5.3中的任意多个字段，可以使用闭包来创建比较函数：

function make_cmp($fields, $fieldcmp='strcmp') {
    return function ($a, $b) use (&$fields) {
        foreach ($fields as $field) {
            $diff = $fieldcmp($a[$field], $b[$field]);
            if($diff != 0) {
                return $diff;
            }
        }
        return 0;
    }
}

usort($arr, make_cmp(array('state', 'event_type', 'date_start')))

对于PHP 5.3中任意数量的不同类型的字段：

function make_cmp($fields, $dfltcmp='strcmp') {
    # assign array in case $fields has no elements
    $fieldcmps = array();
    # assign a comparison function to fields that aren't given one
    foreach ($fields as $field => $cmp) {
        if (is_int($field) && ! is_callable($cmp)) {
            $field = $cmp;
            $cmp = $dfltcmp;
        }
        $fieldcmps[$field] = $cmp;
    }
    return function ($a, $b) use (&$fieldcmps) {
        foreach ($fieldcmps as $field => $cmp) {
            $diff = call_user_func($cmp, $a[$field], $b[$field]);
            if($diff != 0) {
                return $diff;
            }
        }
        return 0;
    }
}

function numcmp($a, $b) {
    return $a - $b;
}
function datecmp($a, $b) {
    return strtotime($a) - strtotime($b);
}
/**
 * Higher priority come first; a priority of 2 comes before 1.
 */
function make_evt_prio_cmp($priorities, $default_priority) {
    return function($a, $b) use (&$priorities) {
        if (isset($priorities[$a])) {
            $prio_a = $priorities[$a];
        } else {
            $prio_a = $default_priority;
        }
        if (isset($priorities[$b])) {
            $prio_b = $priorities[$b];
        } else {
            $prio_b = $default_priority;
        }
        return $prio_b - $prio_a;
    };
}

$event_priority_cmp = make_evt_prio_cmp(
    array('meeting' => 5, 'party' => 10, 'concert' => 7), 
    0);

usort($arr, make_cmp(array('state', 'event' => $event_priority_cmp, 'date_start' => 'datecmp', 'id' => 'numcmp')))
— 斯蒂恩·林恩格特（Stijn Leenknegt）
source
1
您可以简化嵌套，我想您需要对日期做更多的事情，但是到目前为止，这种方法似乎是最好的。
— deceze
1
样本数组中使用的'％Y-％m-％d'格式的好处是字符串比较可用于日期比较。
— 2012年
9

PHP7使用飞船运算符（<=>）（也称为“组合比较运算符”或“三向比较运算符” ），可以轻松地按多列进行超级排序。

资源：https : //wiki.php.net/rfc/combined-comparison-operator

通过多列排序就像在运算符的两边编写平衡/关系数组一样简单。容易做！

我没有用过，uasort()因为我看不到需要保留原始索引。

代码：（演示）

$array = [
    ['ID' => 1, 'title' => 'Boring Meeting', 'date_start' => '2010-07-30', 'event_type' => 'meeting', 'state' => 'new-york'],
    ['ID' => 2, 'title' => 'Find My Stapler', 'date_start' => '2010-07-22', 'event_type' => 'meeting', 'state' => 'new-york'],
    ['ID' => 3, 'title' => 'Mario Party', 'date_start' => '2010-07-22', 'event_type' => 'party', 'state' => 'new-york'],
    ['ID' => 4, 'title' => 'Duct Tape Party', 'date_start' => '2010-07-28', 'event_type' => 'party', 'state' => 'california']
];

usort($array, function($a, $b) {
    return [$a['state'], $a['event_type'], $a['date_start']]
           <=>
           [$b['state'], $b['event_type'], $b['date_start']];
});

var_export($array);

输出量

array (
  0 => 
  array (
    'ID' => 4,
    'title' => 'Duct Tape Party',
    'date_start' => '2010-07-28',
    'event_type' => 'party',
    'state' => 'california',
  ),
  1 => 
  array (
    'ID' => 2,
    'title' => 'Find My Stapler',
    'date_start' => '2010-07-22',
    'event_type' => 'meeting',
    'state' => 'new-york',
  ),
  2 => 
  array (
    'ID' => 1,
    'title' => 'Boring Meeting',
    'date_start' => '2010-07-30',
    'event_type' => 'meeting',
    'state' => 'new-york',
  ),
  3 => 
  array (
    'ID' => 3,
    'title' => 'Mario Party',
    'date_start' => '2010-07-22',
    'event_type' => 'party',
    'state' => 'new-york',
  ),
)

PS7.4及更高版本的ps Arrow语法（演示）...

usort($array, fn($a, $b) => [$a['state'], $a['event_type'], $a['date_start']] <=> [$b['state'], $b['event_type'], $b['date_start']]);
— 米克马克萨
source
3 
class Sort {
    private $actual_order = 'asc';
    private $actual_field = null;

    public function compare_arrays($array1, $array2) {

        if ($array1[$this->actual_field] == $array2[$this->actual_field]) {
            return 0;
        }
        elseif ($array1[$this->actual_field] > $array2[$this->actual_field]) {
            return ($this->actual_order == 'asc' ? 1 : -1);
        }
        else {
            return ($this->actual_order == 'asc' ? -1 : 1);
        }

    }


    public function order_array(&$array) {

        usort($array, array($this, 'compare_arrays'));

    }


    public function __construct ($field, $actual_order = 'asc') {
        $this->actual_field = $field;
        $this->actual_order = $actual_order;
    }

}

// use

$sort = new Sort ("state");

$sort->order_array($array);
— 加布里埃尔·索萨（Gabriel Sosa）
source
3

我试图下面的代码，我成功

数组代码 

$songs =  array(
        '1' => array('artist'=>'Smashing Pumpkins', 'songname'=>'Soma'),
        '2' => array('artist'=>'The Decemberists', 'songname'=>'The Island'),
        '3' => array('artist'=>'Fleetwood Mac', 'songname' =>'Second-hand News')
);

调用数组排序功能 

$songs = subval_sort($songs,'artist'); 
print_r($songs);

数组排序功能 

function subval_sort($a,$subkey) {
    foreach($a as $k=>$v) {
        $b[$k] = strtolower($v[$subkey]);
    }
    asort($b);
    foreach($b as $key=>$val) {
        $c[] = $a[$key];
    }
    return $c;
}

if数组反向排序功能 

function subval_sort($a,$subkey) {
        foreach($a as $k=>$v) {
            $b[$k] = strtolower($v[$subkey]);
        }
        arsort($b);
        foreach($b as $key=>$val) {
            $c[] = $a[$key];
        }
        return $c;
    }
— 帕特尔
source
2

在改进@Stijn Leenknegt的天才代码时，这是我的2分实用函数：

$data[] = array('volume' => 67, 'edition' => 2);
$data[] = array('volume' => 86, 'edition' => 1);
$data[] = array('volume' => 85, 'edition' => 6);
$data[] = array('volume' => 98, 'edition' => 2);
$data[] = array('volume' => 86, 'edition' => 6);
$data[] = array('volume' => 67, 'edition' => 7);

function make_cmp(array $sortValues)
{
    return function ($a, $b) use (&$sortValues) {
        foreach ($sortValues as $column => $sortDir) {
            $diff = strcmp($a[$column], $b[$column]);
            if ($diff !== 0) {
                if ('asc' === $sortDir) {
                    return $diff;
                }
                return $diff * -1;
            }
        }
        return 0;
    };
}

usort($data, make_cmp(['volume' => "desc", 'edition' => "asc"]));
— ling
source
-1

如果要对多维数组排序

第一个数组是：

$results['total_quote_sales_person_wise']['quote_po'];

第二个是：

$results['total_quote_sales_person_wise']['quote_count'];

这两个多维数组您想一次对降序进行排序，然后使用此代码：

array_multisort($results['total_quote_sales_person_wise']['quote_po'],SORT_DESC, $results['total_quote_sales_person_wise']['quote_count'],SORT_DESC);
— 普拉克
source
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