PHP masalah pengisihan tatasusunan berbilang dimensi

Question

Masalah ini agak serupa dengan pesanan oleh dalam Mysql Apa yang diperlukan adalah untuk mensimulasikan pengisihan medan yang berbeza dalam tatasusunan.

Andaikan terdapat tatasusunan berikut:

$beforeSort = [
    "0" => ["nama" => "Zhang San", "bahasa Inggeris" =>
    "1" => ["nama" => "李思", "bahasa Inggeris" =>
    "2" => ["nama" => "老王", "bahasa Inggeris" =>
];

Sekarang anda perlu mengikut susunan cina dalam tatasusunan Jika ia adalah sama, ikut susunan math Hasil akhir mestilah susunan berikut:< /p>

$afterSort = [
    "2" => ["nama" => "老王", "bahasa Inggeris" =>
    "0" => ["nama" => "Zhang San", "bahasa Inggeris" =>
    "1" => ["nama" => "李思", "bahasa Inggeris" =>
];

Adakah anda mempunyai cara berbeza untuk mencapai ini?

Answer 1

Ini adalah versi yang saya gunakan sendiri Cara menggunakannya:

$afterSort = getArraySort($beforeSort, 'chinese', 'SORT_ASC', 'math', 'SORT_ASC');

/**
 * 二维数组排序(数字索引数组将重建索引)
 * @param array $arr 需要排序的数组 二维数组
 * @param string $arg1 排序的键名或字段名
 * @param string $arg2 排序的顺序 SORT_ASC或SORT_DESC
 * @param string $arg3 排序的方法 SORT_REGULAR
 * @return array
 */
function getArraySort($arr, $arg1, $arg2 = "SORT_ASC", $arg3 = "SORT_REGULAR")
{
    if (!is_array($arr) || !$arr)
    {
        return $arr;
    }
    $argcount = func_num_args();
    for ($i = 1; $i < $argcount; $i++)
    {
        $arg = func_get_arg($i);
        if (!preg_match("/SORT_(.*)/i", $arg))
        {
            $keynamelist[] = $arg;
            $sortrule[] = '$' . $arg;
        }
        else
        {
            $sortrule[] = $arg;
        }
    }
    foreach ($arr AS $key => $info)
    {
        foreach ($keynamelist AS $keyname)
        {
            ${$keyname}[$key] = $info[$keyname];
        }
    }
    $evalstring = 'array_multisort(' . join(",", $sortrule) . ',$arr);';
    eval($evalstring);
    return $arr;
}

Answer 2

    $beforeSort = [
        "0"  => ["name" => "张三", "english" => 80, "chinese" => 60, "math" => 50 ],
        "1"  => ["name" => "李四", "english" => 50, "chinese" => 60, "math" => 70 ],
        "2"  => ["name" => "老王", "english" => 30, "chinese" => 50, "math" => 80 ],
    ];
    
    $arr = array();
    foreach($beforeSort as $value) {
        $arr[$value['chinese']][$value['math']] = $value;
    }
    sort($arr);
    
    $result = array();
    foreach($arr as $val) {
        sort($val);
        foreach($val as $vo) {
            $result[] = $vo;
        }
    }
    
    var_dump($result);die;
    

Cetak hasil:

    array(3) {
      [0]=>
      array(4) {
        ["name"]=>
        string(6) "老王"
        ["english"]=>
        int(30)
        ["chinese"]=>
        int(50)
        ["math"]=>
        int(80)
      }
      [1]=>
      array(4) {
        ["name"]=>
        string(6) "张三"
        ["english"]=>
        int(80)
        ["chinese"]=>
        int(60)
        ["math"]=>
        int(50)
      }
      [2]=>
      array(4) {
        ["name"]=>
        string(6) "李四"
        ["english"]=>
        int(50)
        ["chinese"]=>
        int(60)
        ["math"]=>
        int(70)
      }
    }
    
    

Answer 3

Anda boleh menukar tatasusunan kepada set dan kemudian memprosesnya. Kaedah isihan yang dilaksanakan menggunakan koleksi PHP mengkhususkan diri dalam pelbagai pengisihan kompleks

Answer 4

<?php
//Sekarang anda perlu mengikut susunan bahasa Cina dalam tatasusunan Jika ia adalah sama, ikut susunan matematik Hasil akhir mestilah tatasusunan berikut:
$beforeSort = [

"0"  => ["name" => "张三", "english" => 80, "chinese" => 60, "math" => 50 ],
"1"  => ["name" => "李四", "english" => 50, "chinese" => 60, "math" => 70 ],
"2"  => ["name" => "老王", "english" => 30, "chinese" => 50, "math" => 80 ],

];

$data_math = array_column($beforeSort, 'math'); );

Answer 5

$beforeSort = [
    "0"  => ["name" => "张三", "english" => 80, "chinese" => 60, "math" => 80 ],
    "1"  => ["name" => "李四", "english" => 50, "chinese" => 60, "math" => 70 ],
    "2"  => ["name" => "老王", "english" => 30, "chinese" => 50, "math" => 80 ],
];

usort($beforeSort, function($a, $b) {
    return [$a['chinese'], $a['math']] <=> [$b['chinese'], $b['math']];
});

var_dump($beforeSort);

Answer 6

///Meminjam jawapan dari lelaki di tingkat atas

usort($beforeSort, function ($a, $b) {
    return [$a['chinese'], $b['math']] <=> [$b['chinese'], $a['math']];
});

Answer 7

Untuk menyusun tatasusunan berbilang dimensi, terdapat fungsi rasmi yang boleh melaksanakan array_multisort

Answer 8

$beforeSort = [
    "0"  => ["name" => "张三", "english" => 80, "chinese" => 60, "math" => 80 ],
    "1"  => ["name" => "李四", "english" => 50, "chinese" => 60, "math" => 70 ],
    "2"  => ["name" => "老王", "english" => 30, "chinese" => 50, "math" => 80 ]
];

foreach( $beforeSort as $key => $value )
{
    $chinese[$key] = $value['chinese'];
    $math[$key] = $value['math'];
}

array_multisort( $chinese, SORT_ASC, $math, SORT_DESC, $beforeSort );

echo '<pre>';
print_r($beforeSort);

Answer 9

$beforeSort = [

"0"  => ["name" => "张三", "english" => 80, "chinese" => 60, "math" => 50 ],
"1"  => ["name" => "李四", "english" => 50, "chinese" => 60, "math" => 70 ],
"2"  => ["name" => "老王", "english" => 30, "chinese" => 50, "math" => 80 ],

];

foreach ($beforeSort as $key => $value) {

$chinese[$key] =  $value['chinese'];
$math[$key] =  $value['math'];

}
array_multisort($cina, SORT_ASC, $math, SORT_ASC, $beforeSort);
print_r($beforeSort);