如何遍历多维数组？

Question

I have array like this. This array is created dynamically

 Array
 (
  [Data NotUploading] => Array
    (
        [items] => Array
            (
                [0] => Array
                    (
                        [date] => 2013-04-02
                        [issue_id] => 1
                        [phone_service_device] => A
                        [phone_service_model] => 
                        [phone_service_os] => 
                        [phone_service_version] => 
                        [issue_name] => Data NotUploading
                    )

                [1] => Array
                    (
                        [date] => 2013-04-02
                        [issue_id] => 1
                        [phone_service_device] => I
                        [phone_service_model] => 
                        [phone_service_os] => 
                        [phone_service_version] => 
                        [issue_name] => Data NotUploading
                    )



            )

    )

[Battery Problem] => Array
    (
        [items] => Array
            (
                [0] => Array
                    (
                        [date] => 2013-04-03
                        [issue_id] => 3
                        [phone_service_device] => I
                        [phone_service_model] => 
                        [phone_service_os] => 
                        [phone_service_version] => 
                        [issue_name] => Battery Problem
                    )

            )

    )
)

What I need to do is to use 2 foreach or 1 foreach & 1 for loop so that I can get each value of date I did like this

 foreach($gResultbyName  as $key1 => $rec){
         for($j = 0;$j<count($rec);$j++ ){
             echo $rec['items'][$j]['date']; 
         }
     }

but its only retrieving 2013-04-02 & 2013-04-03 that is 0 index date of data NotUploading & 0 index date of Battery Problem. Basically I need to compare each value and others stuff but I just cant get each date value.

Forgive me for ignorance but I tried a lot :(

Answer 1

try this:

foreach ($data as $d)
{
    foreach($d['items'] as $item)
    {
        echo $item['date'];
    }
}

Answer 2

您的for循环循环count($rec)次，但应count($rec['items']) 。

Answer 3

This should load the dates into an array sorted by the issue_name. The you can step through them for further processing.

$dates= array();
foreach ($gResultbyName AS $events){
    foreach ($events['items'] AS $item){
        $dates[$item['issue_name']][] = $item['date'];
    }
}
var_dump($dates);