HTML/PHP – Form – Input as array

I got a form like this

<form>
    <input type="text" class="form-control" placeholder="Titel" name="levels[level]">
    <input type="text" class="form-control" placeholder="Titel" name="levels[build_time]">

    <input type="text" class="form-control" placeholder="Titel" name="levels[level]">
    <input type="text" class="form-control" placeholder="Titel" name="levels[build_time]">
</form>

I’d like to have as $_POST output an array like:

Array (
  [1] => Array ( [level] => 1 [build_time] => 123 )
  [2] => Array ( [level] => 2 [build_time] => 456 )
)

I know I could do something like name=”levels[1][build_time]” and so on, but since these elements get added dynamically, it would be hard to add an index. Is there another way?

As suggested, I changed my form. I also included my whole HTML now, because I think I’m missing something here. My HTML now:

<div class="form-group">
  <label class="col-md-2">Name(z.B. 1)</label>
  <div class="col-md-10">
    <input type="text" class="form-control" placeholder="Titel" name="levels[][level]">
  </div>

  <label class="col-md-2">Bauzeit(In Sekunden)</label>
  <div class="col-md-10">
    <input type="text" class="form-control" placeholder="Titel" name="levels[][build_time]">
  </div>
</div>

<div class="form-group">
  <label class="col-md-2">Name(z.B. 1)</label>
  <div class="col-md-10">
    <input type="text" class="form-control" placeholder="Titel" name="levels[][level]">
  </div>

  <label class="col-md-2">Bauzeit(In Sekunden)</label>
  <div class="col-md-10">
    <input type="text" class="form-control" placeholder="Titel" name="levels[][build_time]">
  </div>
</div>

The output I get now is:

[levels] => Array (
  [0] => Array ( [level] => 1 )
  [1] => Array ( [build_time] => 234 )
  [2] => Array ( [level] => 2 )
  [3] => Array ( [build_time] => 456 )
)

As suggested in your edit, I edited my form and moved the square brackets to the end of the name. The output I get now is:

[levels] => Array (
  [level] => Array (
    [0] => 1
    [1] => 2
  )
  [build_time] => Array (
    [0] => 234
    [1] => 456
  )
)

I guess that would kind of work, but it still looks complicated. Isn’t there a better way?

Answer

Simply add [] to those names like

 <input type="text" class="form-control" placeholder="Titel" name="levels[level][]">
 <input type="text" class="form-control" placeholder="Titel" name="levels[build_time][]">

Take that template and then you can add those even using a loop.

Then you can add those dynamically as much as you want, without having to provide an index. PHP will pick them up just like your expected scenario example.

Edit

Sorry I had braces in the wrong place, which would make every new value as a new array element. Use the updated code now and this will give you the following array structure

levels > level (Array)
levels > build_time (Array)

Same index on both sub arrays will give you your pair. For example

echo $levels["level"][5];
echo $levels["build_time"][5];

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Answer