PHP中的动态数组索引

Question

I don't know why I'm having trouble figuring this out, but I'm hoping someone can help.

I want to dynamically add multiple indices to an array. For example, if I have a list of IDs.

$ids = array(1247, 1248);

How can I do this dynamically, depending on the number of ids that are in the array?

$history['transactions'][$id1][$id2]['Thursday'] = 0;

Answer 1

If I am unserstanding you correctly, then your code should work. unless you are trying to use the array your created, take a look. I think a simple change could solve your problem

this would work:

$ids = array(1247, 1248);
$history['transactions'][$ids[0]][$ids[1]]['Thursday'] = 0;

So would this:

$id1 = 1247;
$id2 = 1248;
$history['transactions'][$id1][$id2]['Thursday'] = 0;

From the looks of it, you just aren't calling anything. but without more of your code I can't be more help

---

As Daedalus points out, to this point the code isn't really dynamic, (I assumed you just needed a snipit in the the middle to help with already dynamic code. but now I will assume the opposite) here is an example of how how to change that:

say you had the array $ids = array(1247, 1248, 1249, 1250, 1251); you would need to loop through the lot of them and deal with them individually. Probably the easiest way to do that would be something like:

$ids = array(1247, 1248, 1249, 1250, 1251);
foreach($ids as $id){
    $history['transactions'][$id]['Thursday'] = 0;
}

Make sense?

---

Third try: Getting a better understanding of whats going on. (sorry, took a long time to get it through my thick skull)

So if you want an array with all the ids in order of the array $ids = array(1247, 1248, 1249, 1250, 1251); then this is the solution for you:

$ids = array(1247, 1248, 1249, 1250, 1251);
$result = array('Thursday' => 0);
for($i = count($ids) -1; $i >= 0; $i--){
     $result = array($ids[$i] => $result);
}
$history = array('transactions' => $result);

var_dump($history) yields:

array(1) {
  ["transactions"]=>
  array(1) {
    [1247]=>
    array(1) {
      [1248]=>
      array(1) {
        [1249]=>
        array(1) {
          [1250]=>
          array(1) {
            [1251]=>
            array(1) {
              ["Thursday"]=>
              int(0)
            }
          }
        }
      }
    }
  }
}

Which is now what I believe you are looking for