我如何在这个多维数组中获取值

Question

I have a multi-dimensional array as follows:

Array
(
 [lists] => Array
    (
        [0] => Array
            (
                [id] => 23ybdwhdwbed
                [name] => TEST
            (
        [1] => Array
            (
                [id] => e223edsewed
                [name] => TEST 2
            (
    )
)

I want to access the ID & name variables using a foreach loop.

I'm using this:

$x = 0;
foreach($lists as $list){

    $listId = $list[$x]['id'];
    $listName = $list[$x]['name'];

    echo"$x | $listId $listName <br />";

$x++;
}

For some strange reason, I can only get the value of the first $listId & $name, not the second $listId or $name.

What am I doing wrong here?

Answer 1

You're assuming that you still need to provide the key for each child element. This is not the case.

try

foreach($lists as $list){

    $listId = $list['id'];
    $listName = $list['name'];

    $listId $listName <br />";

}

the foreach() will iterate over them in turn.

if you do need the index number, do this instead.

foreach($lists as $x => $list){

where $x is the index.

Answer 2

The array you posted is wrong because it's missing closing ) , so correct that (I think that is TYPO mistake)

After that you need to do it like below:-

foreach($lists['lists'] as $key=> $list){
   $listId = $list['id'];
   $listName = $list['name'];
   echo "$key | $listId $listName <br />";
}

Output:- https://eval.in/846464

Or an one-liner code:-

foreach($lists['lists'] as $key=> $list){
  echo "$key | ".$list['id']." ".$list['name']." <br />";
}

Output:- https://eval.in/846465

Answer 3

Your foreach iterates the first, not the second level of your multi dimensional array.

Since the first level only holds the lists array as one and only element the loop only executes once.

Pass the lists key to the foreach instead like so:

$x = 0;
foreach($lists['lists'] as $list) {
    echo "$x | " . $list['id'] . " " . $list['name'] . "<br />"; 
    ++$x;
}

Also note how in here I reference the list elements by name to make it easier to read.

Answer 4

I think those numerical indexed will just confuse you so try this instead:

$my_array = array(array("id" => "23ybdwhdwbed", "name" => "TEST"), array("id" => "e223edsewed", "name" => "TEST 2"));

To access the values: use:

foreach($my_array as $my_data){
    echo "ID:" . $my_data["id"];
    echo "<br>";
    echo "NAME:" .$my_data["name"];
    echo "<br><br>";
}

Answer 5

you just need to do:

foreach($lists['list'] as $listKey=>$listValue){
   $listId = $listValue['id'];
   $listName = $listValue['name'];
   echo"$listKey | $listId : $listName <br />";
}

Answer 6

Try this, I fixed your array structure to work, this is also dynamic so it does not matter how many array you have 0 -> above

       $array = array(
                      'lists' => array(
                                      '0' => array(
                                                    'id' => '23ybdwhdwbed',
                                                    'name' => 'TEST 1'
                                                    ),
                                      '1' => array(
                                                    'id' => 'e223edsewed',
                                                    'name' => 'TEST 2'
                                                   )
                                      )
    );

      foreach ($array as $key => $value) {

        for($ctr = 0; $ctr < count($value); $ctr++){
             echo 'ID: ' . $value[$ctr]['id'] . '<br>';
             echo 'Name: : ' . $value[$ctr]['name'] . '<br><br>';
        }
      }