Question

我有这个数组。

Array
(
    [0] => Array
        (
            [name] => SUNDERLAND
            [pts] => 2
            [gd] => -4
            [group] => A
        )

    [1] => Array
        (
            [name] => NEWCASTLE
            [pts] => 2
            [gd] => -3
            [group] => C
        )

    [2] => Array
        (
            [name] => STOKE CITY
            [pts] => 2
            [gd] => -2
            [group] => B
        )

    [3] => Array
        (
            [name] => WATFORD
            [pts] => 3
            [gd] => -2
            [group] => A
        )

    [4] => Array
        (
            [name] => TOTTENHAM
            [pts] => 3
            [gd] => -1
            [group] => B
        )

    [5] => Array
        (
            [name] => CHELSEA
            [pts] => 4
            [gd] => -5
            [group] => C
        )

    [6] => Array
        (
            [name] => NORWICH
            [pts] => 4
            [gd] => -3
            [group] => D
        )

    [7] => Array
        (
            [name] => WEST BROM
            [pts] => 4
            [gd] => -4
            [group] => D
        )

)

我必须按照一些标准对这些数组元素进行排序和分组。

在同一组中，第一个NAME是具有更大pts参数的名称（DESC by pts参数）。如果pts通过gd参数（DESC by gd参数）参数相同的顺序

团队名称与同一组在一起。

Name        pts     gd      group

WATFORD     3       -2      A
SUNDERLAND  2       -4      A
TOTTENHAM   3       -1      B
STOKE CITY  2       -2      B
CHELSEA     4       -5      C
NEWCASTLE   2       -3      C
NORWICH     4       -3      D
WEST BROM   4       -4      D

在这一刻我可以通过pts和gd按如下方式排序：

<?php
function sortByOrder($a, $b){
    $c = $a['pts'] - $b['pts'];
    $c .= $a['gd'] - $b['gd'];
    return $c;
}
usort($all_teams_nf, 'sortByOrder');

foreach($all_teams_nf as $myarr){
    foreach($myarr as $key => $team){
        if($key!="pts" and $key!="gd" and $key!="group"){
            $all_teams[] = $team;
        }
    }
}

$all_teams = array_reverse($all_teams);
?>

请帮助按组进行组合，然后按照pts和gd在每个组顺序中进行组合。（在最终结果中，我需要显示组名和团队名称！

A   
    WATFORD 
    SUNDERLAND
B
    TOTTENHAM
    STOKE CITY
C
    CHELSE
    NEWCASTLE
D
    NORWICH
    WEST BROM

Answer 1

我会使用array_multisort代替usort。首先按组密钥对行进行分组。然后在每个组中使用array_multisort。最后，如果您需要按排序顺序显示组，也可以使用ksort。

$arraysByGroup = array();

// group by group key
foreach($array as $element) {
    $arraysByGroup[$element['group']][] = $element;
}

// sort each group by name, pts, gd
foreach($arraysByGroup as &$group) {

    $name = $pts = $gd = array();

    foreach($group as $key => $value) {
        $name[$key] = $value['name'];
        $pts[$key] = $value['pts'];
        $gd[$key] = $value['gd'];
    }

    array_multisort($name, SORT_ASC, $pts, SORT_DESC, $gd, SORT_DESC, $group);
}

ksort($arraysByGroup);
print_r($arraysByGroup);

Answer 2

我们来看看

这是我的阵列：

$array = array( array("name" => "SUNDERLAND", "pts" => "2", "gd" => "-4", "group" => "A"), 
                array("name" => "NEWCASTLE", "pts" => "2", "gd" => "-3", "group" => "C"), 
                array("name" => "STOKE CITY", "pts" => "2", "gd" => "-2", "group" => "B"), 
                array("name" => "WATFORD", "pts" => "3", "gd" => "-2", "group" => "A"), 
                array("name" => "TOTTENHAM", "pts" => "3", "gd" => "-1", "group" => "B"), 
                array("name" => "CHELSEA", "pts" => "4", "gd" => "-5", "group" => "C"), 
                array("name" => "NORWICH", "pts" => "4", "gd" => "-3", "group" => "D"),
                array("name" => "WEST BROM", "pts" => "4", "gd" => "-4", "group" => "D")
);

这是我的结果：

Array
(
    [A] => Array
        (
            [0] => Array
                (
                    [name] => SUNDERLAND
                    [pts] => 2
                    [gd] => -4
                    [group] => A
                )

            [1] => Array
                (
                    [name] => WATFORD
                    [pts] => 3
                    [gd] => -2
                    [group] => A
                )

        )

    [B] => Array
        (
            [0] => Array
                (
                    [name] => STOKE CITY
                    [pts] => 2
                    [gd] => -2
                    [group] => B
                )

            [1] => Array
                (
                    [name] => TOTTENHAM
                    [pts] => 3
                    [gd] => -1
                    [group] => B
                )

        )

    [C] => Array
        (
            [0] => Array
                (
                    [name] => CHELSEA
                    [pts] => 4
                    [gd] => -5
                    [group] => C
                )

            [1] => Array
                (
                    [name] => NEWCASTLE
                    [pts] => 2
                    [gd] => -3
                    [group] => C
                )

        )

    [D] => Array
        (
            [0] => Array
                (
                    [name] => NORWICH
                    [pts] => 4
                    [gd] => -3
                    [group] => D
                )

            [1] => Array
                (
                    [name] => WEST BROM
                    [pts] => 4
                    [gd] => -4
                    [group] => D
                )

        )

)

在A组，我需要通过pts进行DESC - 有ASC 在B组同样的事情在C组和C组中D结果没问题

使用Usort功能进行排序和分组

2 个答案: