按多个字段对多维数组进行排序

Question

我发现了一些关于此的问题，但我觉得我这里有一个非常特殊的案例，所以我要问一个新问题。

我需要先按用户（数组）的头衔对用户数组进行排序，然后按姓氏排序，请考虑以下代码：

<?php
$users = [
    [
        'lastName' => 'Clarks',
        'titles' => ['Manager', 'Supervisor']
    ],
    [
        'lastName' => 'Clarkson',
        'titles' => ['Sales']
    ],
    [
        'lastName' => 'Adams',
        'titles' => ['Supervisor']
    ],
    [
        'lastName' => 'Adams',
        'titles' => ['Manager', 'Senior Manager']
    ],
    [
        'lastName' => 'Clarkson',
        'titles' => ['Manager']
    ],
    [
        'lastName' => 'Davids',
        'titles' => ['Senior Manager']
    ]
];

而我想要的顺序是：

<?php
$order = [
    'Senior Manager',
    'Manager',
    'Supervisor'
];

如果有多个经理，他们应该按姓氏排序，所以在这种情况下输出将是：

<?php
$sorted = [
    [
        'lastName' => 'Adams',
        'titles' => ['Manager', 'Senior Manager']
    ],
    [
        'lastName' => 'Davids',
        'titles' => ['Senior Manager']
    ],
    [
        'lastName' => 'Clarks',
        'titles' => ['Manager', 'Supervisor']
    ],
    [
        'lastName' => 'Clarkson',
        'titles' => ['Manager']
    ],
    [
        'lastName' => 'Adams',
        'titles' => ['Supervisor']
    ],
    [
        'lastName' => 'Clarkson',
        'titles' => ['Sales']
    ]
];

我已经按照这些思路尝试了一些方法，但无法正常工作，并且发现调试起来有点困难 usort:

<?php
foreach ($order as $title) {
    usort($users, function ($a, $b) use ($title) {
        # Both have the title
        if (in_array($title, $a['titles']) and in_array($title, $b['titles']) ) {
            # Sort by name
            return strcmp($a['lastName'], $b['lastName']);
        }
        # A has the title
        elseif (in_array($title, $a['titles'])) {
            return 1;
        }
        # B has the title
        elseif (in_array($title, $b['titles'])) {
            return -1;
        }

        # No-one has the title
        return strcmp($a['lastName'], $b['lastName']);
    });
}

Answer 1

问题是数组被一遍又一遍地排序。因此，如果您在 foreach 循环中逐步进行，项目将首先按高级经理职位排序，然后再次按经理职位排序，最后再次按主管职位排序。

所以首先，你必须颠倒你想要的顺序：

$order = array_reverse([
    'Senior Manager',
    'Manager',
    'Supervisor'
]);

那么如果 none 个项目有标题，您就不想四处移动项目。因为在您的其他迭代中，您的 Senior Manager 可能没有 Supervisor 头衔，而其他用户也可能没有该头衔，因此他们都不应更改职位。所以你可以把最后的return改成return 0;

最后，您颠倒了 1 和 -1 的 return，因此您只需将它们调换即可。

最后，最终代码如下所示：

$users = [
    [
        'lastName' => 'Clarks',
        'titles' => ['Manager', 'Supervisor']
    ],
    [
        'lastName' => 'Clarkson',
        'titles' => ['Sales']
    ],
    [
        'lastName' => 'Adams',
        'titles' => ['Supervisor']
    ],
    [
        'lastName' => 'Adams',
        'titles' => ['Manager', 'Senior Manager']
    ],
    [
        'lastName' => 'Clarkson',
        'titles' => ['Manager']
    ],
    [
        'lastName' => 'Davids',
        'titles' => ['Senior Manager']
    ]
];

$order = array_reverse([
    'Senior Manager',
    'Manager',
    'Supervisor'
]);

foreach ($order as $title) {
    usort($users, function ($a, $b) use ($title) {
        if (in_array($title, $a['titles']) && in_array($title, $b['titles'])) {
            return strcmp($a['lastName'], $b['lastName']);   
        }
        # A has the title
        elseif (in_array($title, $a['titles'])) {
            return -1;
        }
        # B has the title
        elseif (in_array($title, $b['titles'])) {
            return 1;
        }

        return 0;
    });   
}

输出将是：

array(6) {
  [0]=>
  array(2) {
    ["lastName"]=>
    string(5) "Adams"
    ["titles"]=>
    array(2) {
      [0]=>
      string(7) "Manager"
      [1]=>
      string(14) "Senior Manager"
    }
  }
  [1]=>
  array(2) {
    ["lastName"]=>
    string(6) "Davids"
    ["titles"]=>
    array(1) {
      [0]=>
      string(14) "Senior Manager"
    }
  }
  [2]=>
  array(2) {
    ["lastName"]=>
    string(6) "Clarks"
    ["titles"]=>
    array(2) {
      [0]=>
      string(7) "Manager"
      [1]=>
      string(10) "Supervisor"
    }
  }
  [3]=>
  array(2) {
    ["lastName"]=>
    string(8) "Clarkson"
    ["titles"]=>
    array(1) {
      [0]=>
      string(7) "Manager"
    }
  }
  [4]=>
  array(2) {
    ["lastName"]=>
    string(5) "Adams"
    ["titles"]=>
    array(1) {
      [0]=>
      string(10) "Supervisor"
    }
  }
  [5]=>
  array(2) {
    ["lastName"]=>
    string(8) "Clarkson"
    ["titles"]=>
    array(1) {
      [0]=>
      string(5) "Sales"
    }
  }
}

Answer 2

您想要的是根据 $order 中用户头衔的 最低索引 对用户进行排序。您可以使用 array_search 在 $order 中找到他们的每个标题索引，并使用 min 找到最小的数字。如果它们相同，则退回到 strcmp.

usort($users, function($a, $b) use ($order) {
    $minAPos = min(array_map(function($title) use ($order) {
        $pos = array_search($title, $order);
        return $pos === false? sizeof($order) : $pos;
    }, $a['titles']));
    $minBPos = min(array_map(function($title) use ($order) {
        $pos = array_search($title, $order);
        return $pos === false? sizeof($order) : $pos;
    }, $b['titles']));

    if($minAPos === $minBPos) {
        return strcmp($a['lastName'], $b['lastName']);
    } else {
        return $minAPos <=> $minBPos;
    }
});

按多个字段对多维数组进行排序

Sort multidimensional array by multiple fields

php

arrays

usort