PHP-从多维数组中删除重复值
How can I remove duplicate values from a multi-dimensional array in PHP?
如何从PHP中的多维数组中删除重复值?
Example array:
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
)
)
)
)
)
I'd like to remove those with duplicate name. So i only want to keep one subject each day.
我想删除名称重复的那些。所以我只想每天保留一个主题。
my code so far:
我的代码到目前为止:
$taken = array();
foreach($subject_list['choice'][0]["value"] as $key =>$item )
{
if(!in_array($item['name'], $taken))
{
$taken[] = $item['name'];
}else
{
unset($flight_list['choice'][0]["value"][$key]);
}
}
OUTPUT of the code above (which is obviously wrong):
上面代码的输出(显然是错误的):
Array
(
[choice] => Array
(
[0] => Array
(
[day] => Monday
[value] => Array
(
[0] => Array
(
[name] => BI
[time] => 10:00
[location] => B123
)
)
)
[1] => Array
(
[day] => Tuesday
[value] => Array
(
[0] => Array
(
[name] => BI
[time] => 10:00
[location] => B123
)
[1] => Array
(
[name] => BI
[time] => 11:00
[location] => A123
)
)
)
)
)
Anyone can help me how can i remove same class name at Tuesday.
任何人都可以帮助我如何在星期二删除相同的班级名称。
3 个解决方案
#1
If you want to keep the first set of unique values in each value batch in terms of name, then just create a temporary container for that. If you already have pushed it, then don't process anything, after the gathering, overwrite the batch using foreach with & reference:
如果要根据名称在每个值批处理中保留第一组唯一值,则只需为其创建一个临时容器。如果你已经推了它,那么不要处理任何东西,在收集之后,使用foreach和&reference覆盖批处理:
foreach($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
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