如何在PHP中对关联数组进行排序

Question

我的数组看起来像这样。

Array ( 
     [0] => Array ( 
                 [id] => 1 
                 [language] => English 
                 ) 
     [1] => Array ( 
                 [id] => 3 
                 [language] => Japanese 
                 ) 
     [2] => Array ( 
                 [id] => 4 
                 [language] => Italian 
                 ) 
      [3] => Array ( 
                 [id] => 5 
                 [language] => Spanish 
                 ) 
       [4] => Array (
                 [id] => 6 
                 [language] => French 
                 ) 
   )

现在我要做的是根据语言对这个数组进行排序。所以它应该变成这样。

Array ( 
     [0] => Array ( 
                 [id] => 1 
                 [language] => English 
                 ) 
     [1] => Array ( 
                 [id] => 6 
                 [language] => French 
                 ) 
      [2] => Array ( 
                 [id] => 4 
                 [language] => Italian 
                 ) 
       [3] => Array ( 
                 [id] => 3 
                 [language] => Japanese 
                 )  
        [4] => Array ( 
                 [id] => 5 
                 [language] => Spanish 
                 ) 
      )

实际上我确实发现PHP手册很有帮助。它已经解决了。我不知道是否允许我添加问题的答案。但这就是我做到的。我发现PHP的usort对这样的条件很有帮助。 http://hk2.php.net/manual/en/function.usort.php

function build_sorter($key){
    return function ($a, $b) use ($key) {
        return strnatcmp($a[$key], $b[$key]);
    };
}

usort($langs, build_sorter('language'));

foreach ($langs as $value) {
    echo '<option value="'.$value['id'].'">'.$value['language'].'</option>';
}

Answer 1

提取language列并按该数组对原始数组进行排序：

array_multisort(array_column($array, 'language'), $array);