Question

我有一个多维数组，我想按字母顺序对第二级值进行排序

$shop = array(
"director" => Array
    (
        "0" => 'Sushil Majumdar',
        "1" => 'Jyotirmoy Ray',
        "3" => 'Phani Gangopadhyay',
        "5" => 'Chitta Bose',
        "6" => 'Satyajit Ray',
        "7" => 'Ajoy Kar'
    ),

    "producer" => Array
    (
        "0" => 'Bharat Lokchitram Ltd.',
        "1" => 'Lokbani Chitrapratisthan',
        "2" => 'Rama Chhayachitra',
        "3" => 'Poddar Pictures',
        "4" => 'Rama Chhayachitra Ltd.',
        "5" => 'Chhayachitra Parishad',
        "6" => 'Government of West Bengal',
        "7" => 'Bikash Ray Productions',
        "8" => 'Epic Films'
    )
);
$keys = array('director'=>1);

foreach ($shop as $k => $v){
    if(array_key_exists($k, $keys)){
       foreach ($v as $ke => $ve){
            sort($shop[$k]);

       }
    }
}

虽然它可以排序但不知何故它在我的结果中没有受到影响那么我怎样才能按字母顺序按升序排序我的数组值

Answer 1

您的代码段正常运行。但是，用于迭代$ v的每个循环在排序中没有任何作用。所以你可以删除那个。保持喜欢;

foreach ($shop as $k => $v){
    if(array_key_exists($k, $keys)){
        sort($shop[$k]);
    }
}
print_r($shop);  //alphabetically sorted values under "director" key

如果您打印$ shop数组，您会发现“director”键下的值按字母顺序排序。

Answer 2

您可以使用以下函数在第二级对数组进行排序：

function sortOnKeys($array, array $keys) {
    foreach ($array as $k => $v){
        if(array_key_exists($k, $keys)){
            sort($array[$k]);
        }
    }
    return $array;
}



 /* set your keys */
$keys = array('director' => 1, 'producer' => 2);


/* invoke the sorting function */
$sorted = sortOnKeys($shop, $keys);


echo '<pre>';
var_dump($sorted);
echo '</pre>';

通过值php在第二级排序多维数组

2 个答案: