Question

如何从PHP中删除多维数组中的重复值？

示例数组：

   Array
(
    [choice] => Array
        (
            [0] => Array
                (
                    [day] => Monday
                    [value] => Array
                        (
                            [0] => Array
                                (
                                    [name] => BI
                                    [time] => 10:00 
                                    [location] =>  B123
                                )
                            [1] => Array
                                (
                                    [name] => BI
                                    [time] => 11:00 
                                    [location] =>  A123
                                )
                        )
                )

            [1] => Array
                (
                    [day] => Tuesday
                    [value] => Array
                        (
                            [0] => Array
                                (
                                    [name] => BI
                                    [time] => 10:00 
                                    [location] =>  B123
                                )
                            [1] => Array
                                (
                                    [name] => BI
                                    [time] => 11:00 
                                    [location] =>  A123
                                )
                        )
                    )
        )
)

我想删除重复name的内容。所以我只想每天保留一个主题。

到目前为止我的代码：

$taken = array();
foreach($subject_list['choice'][0]["value"] as $key =>$item )
{ 
    if(!in_array($item['name'], $taken)) 
    {
        $taken[] = $item['name'];
    }else 
    {
        unset($flight_list['choice'][0]["value"][$key]);
    }

}

上面代码的输出（显然是错误的）：

Array
(
    [choice] => Array
        (
            [0] => Array
                (
                    [day] => Monday
                    [value] => Array
                        (
                            [0] => Array
                                (
                                    [name] => BI
                                    [time] => 10:00 
                                    [location] =>  B123
                                )
                        )
                )

            [1] => Array
                (
                    [day] => Tuesday
                    [value] => Array
                        (
                            [0] => Array
                                (
                                    [name] => BI
                                    [time] => 10:00 
                                    [location] =>  B123
                                )
                            [1] => Array
                                (
                                    [name] => BI
                                    [time] => 11:00 
                                    [location] =>  A123
                                )
                        )
                    )
        )
)

任何人都可以帮助我如何在name删除相同的课程Tuesday。

Answer 1

如果您希望在value每个name批次中保留第一组唯一值，则只需为此创建一个临时容器。如果您已将其推送，则在收集后不要处理任何内容，请使用foreach &引用覆盖批处理：

foreach($subject_list['choice'] as &$items) {
    $temp = array(); // temporary container for current iteration
    foreach($items['value'] as $value) {
        if(!isset($temp[$value['name']])) { // if its new
            $temp[$value['name']] = $value; // push the batch using the key name
        }
    }
    $items['value'] = $temp; // apply unique value in the end of this batch
}

Sample Output

Answer 2

其中$array是你的数组即将到来的php变量

 $array = array_map("unserialize", array_unique(array_map("serialize", $array)));

Answer 3

快速谷歌删除多维数组中的重复项：

<?php
function super_unique($array)
{
  $result = array_map("unserialize", array_unique(array_map("serialize", $array)));

  foreach ($result as $key => $value)
  {
    if ( is_array($value) )
    {
      $result[$key] = super_unique($value);
    }
  }

  return $result;
}
?>

PHP-从多维数组中删除重复值

3 个答案: