相关疑难解决方法(0)

我将CSV数据加载到多维数组中.这样,每个"行"都是一个记录,每个"列"包含相同类型的数据.我正在使用下面的函数加载我的CSV文件.

function f_parse_csv($file, $longest, $delimiter)
{
  $mdarray = array();
  $file    = fopen($file, "r");
  while ($line = fgetcsv($file, $longest, $delimiter))
  {
    array_push($mdarray, $line);
  }
  fclose($file);
  return $mdarray;
}

我需要能够指定要排序的列,以便重新排列行.其中一列包含格式为的日期信息,Y-m-d H:i:s我希望能够以最近的日期为第一行进行排序.

我有这种格式的数组:

Array
(
    [0] => Array
        (
            [text] => tests
            [language] => 
            [advertiserCompetitionScale] => 5
            [avgSearchVolume] => 7480000
            [lastMonthSearchVolume] => 9140000
        )

    [1] => Array
        (
            [text] => personality tests
            [language] => 
            [advertiserCompetitionScale] => 5
            [avgSearchVolume] => 165000
            [lastMonthSearchVolume] => 201000
        )

    [2] => Array
        (
            [text] => online tests
            [language] => 
            [advertiserCompetitionScale] => 5
            [avgSearchVolume] => 246000
            [lastMonthSearchVolume] => 301000
        )

)

如何按avgSearchVolume字段的降序排列该格式的数组？这有内置功能吗？

我有一个数组:

Array (
    [0] => stdClass Object (
        [user_id] => 1
        [ID] => 1
        [user_login] => admin
        [display_name] => admin
        [user_email] => webbinformation@nacka.se
        [meta_value] => a:1:{s:13:\"administrator\";s:1:\"1\";}
    )
    [1] => stdClass Object (
        [user_id] => 4
        [ID] => 4
        [user_login] => ungtinflytande
        [display_name] => ungtinflytande
        [user_email] => klarakviberg@gmail.com
        [meta_value] => a:1:{s:13:\"administrator\";s:1:\"1\";}
    )
    [2] => stdClass Object (
        [user_id] => 5
        [ID] => 5
        [user_login] => inflytandepilot
        [display_name] => inflytandepilot
        [user_email] => hildalundgren@hotmail.com
        [meta_value] => a:1:{s:6:\"author\";s:1:\"1\";}
    )
    [3] => stdClass Object ( …