php: How to foreach a multidimensional array?

Question

I have been trying for a while but I can't seem to loop through a multi dimensional array.

I have this array:

$Work["work_time"] = array();
$Work["break_time"] = array();
$Work["meeting_time"] = array();
$Work["login_time"] = array();
$Work["logout_time"] = array();
$Work["work_date"] = array();

Which print_r($Work) outputs this

Array
(
    [work_time] => Array
        (
            [0] => 0.00
            [1] => 3.96
            [2] => 7.75
        )

    [break_time] => Array
        (
            [0] => 0.00
            [1] => 0.00
            [2] => 1.06
        )

    [meeting_time] => Array
        (
            [0] => 0.00
            [1] => 0.00
            [2] => 0.00
        )

    [login_time] => Array
        (
            [0] => 10:11
            [1] => 08:48
            [2] => 09:09
        )

    [logout_time] => Array
        (
            [0] => 00:00
            [1] => 13:00
            [2] => 17:59
        )

    [work_date] => Array
        (
            [0] => 2018-04-13
            [1] => 2018-04-16
            [2] => 2018-04-17
        )
)

And then I tried to use a foreach loop to loop through it and get the values but it returns nothing..

foreach ($Work as $row) {
 echo $row["login_time"];
}

What am I missing?

Possible duplicate of [Sort Multi-dimensional Array by Value](https://stackoverflow.com/questions/2699086/sort-multi-dimensional-array-by-value) — Matheus Cuba, Apr 20 '18 at 21:17
Where does this array come from? Is it input from an HTML form? — Don't Panic, Apr 20 '18 at 21:25
@CharisMoutafidis It may be a duplicate of _something_, but I agree it has nothing to do with sorting. — Don't Panic, Apr 20 '18 at 21:44

Charis Moutafidis · Answer 1 · 2018-04-20T21:28:42.857

If you really dont know how many dimensions you are dealing with, a recursive solution is what you need. Here is my code:

$Work["work_time"] = array(1, 2, 3);
$Work["break_time"] = array(4, 5, 6);
$Work["meeting_time"] = array(7, 8, 9);
$Work["login_time"] = array(10, 11, 12);
$Work["logout_time"] = array(13, 14, 15);
$Work["work_date"] = array(16, 17, 18);

function forLoop($array){
    foreach ($array as $row) {
        if(is_array($row)){
            forLoop($row);
        }
        else{
            echo $row;
            echo " ";
        }
    }
}

forLoop($Work);

Output:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

You actually need to make a formating or something to make it work the way you want it to. Edit: forLoop function calls it's self so it will work on any dimension array. Tell me what you think!

Don't Panic · Accepted Answer · 2018-04-20T21:48:31.097

The array you're trying to iterate with your foreach loop is not the same as the array you have. In order to use that loop, your array would need to be like this instead:

[
    [
        'work_time' => 0.00,
        'break_time' => 0.00,
        'meeting_time' => 0.00,
        'login_time' => '10:11',
        'logout_time' => '00:00',
        'work_date' => '2018-04-13'
    ],
    [
        'work_time' => 3.96,
        'break_time' => 0.00,
        'meeting_time' => 0.00,
        'login_time' => '08:48',
        'logout_time' => '13:00',
        'work_date' => '2018-04-16'
    ],
    [
        'work_time' => 7.75,
        'break_time' => 1.06,
        'meeting_time' => 0.00,
        'login_time' => '09:09',
        'logout_time' => '17:59',
        'work_date' => '2018-04-17'
    ],
];

The array you have looks like the type of input you get if you have an HTML form with multiple rows of inputs with names like this:

<input type="text" name="work[work_time][]">

If that is the case, you can get an array like the one I showed above instead by switching the keys around and specifying a numeric key for each row:

<input type="text" name="work[0][work_time]">

Then it will make more sense to access the data as rows. If that's not the case, well, never mind. :)

On the other hand, with the array you have, you can just iterate one of the inner arrays directly. For example, if you wanted to show login_time values, it's just

foreach ($Work['login_time'] as $login_time) {
    echo $login_time;
}

If you need to get corresponding values from the other inner arrays, you can use the key from the array you're iterating to access those as well:

foreach ($Work['login_time'] as $key => $login_time) {
    echo 'login time: ' . $login_time . ', work_date: ' . $Work['work_date'][$key];
}

Derek · Answer 3 · 2018-04-20T21:31:21.937

1

If you already know the key you need (login_time), you do not need to iterate the array. You can access it directly as $Work["login_time"].

If you want to iterate $Work["login_time"], you can use foreach:

foreach ($Work['login_time'] as $row) {
   echo $row;
}

edited Apr 20 '18 at 21:31

answered Apr 20 '18 at 21:23

Derek

3,438
1
17
35

score 0 · Answer 4 · answered Apr 20 '18 at 21:21

0

Probably need multiple for loops

foreach ($Work as $row) {
   foreach($row as $key => $rs) {
       echo $rs;
  }
}

answered Apr 20 '18 at 21:21

Aman jaura

201
3
15

score 0 · Answer 5 · answered Apr 20 '18 at 21:22

0

To loop completely you would need a 2nd foreach inside the first foreach. Like This:

 foreach ($Work as $row) {
  foreach ($row as $key => $value) {
  echo "$key - $value";
 }
}

answered Apr 20 '18 at 21:22

CharlesEF

608
1
15
25

score 0 · Answer 6 · answered Apr 20 '18 at 21:22

0

foreach ($dataArray as $innerArray){
   foreach ($innerArray as $key=>$value){
   // here is where you access the array -- $value
   }
}

answered Apr 20 '18 at 21:22

Danyal Sandeelo

12,196
10
47
78

php: How to foreach a multidimensional array?

6 Answers6