[Best way to get an array slice starting from 'current']

Thanks mac_gyver

Here's the JSON

{
  "ec": "3CB220804",
  "ID": "1X1291167M031591B",
  "FullName0": "Walter Mitty",
  "email0": "walt@thurber.com",
  "phone0": "",
  "comments0": "",
  "member0": "true",
  "date00": "true",
  "date10": "true",
  "date20": "true",
  "cost": "90"
}

Yes I can change the POST keys.  I just didn't want to rewrite huge amounts to change to using JSON POST encoding.  Faking up the []s, I get

{
  "ec": "3CB220804",
  "ID": "4B965680NN227192S",
  "FullName": [
    "Walter Mitty"
  ],
  "email": [
    "walt@thurber.com"
  ],
  "phone": [
    ""
  ],
  "comments": [
    ""
  ],
  "member": [
    "true"
  ],
  "date": [
    [
      "true",
      "true",
      "true"
    ]
  ],
  "cost": "90"
}

Which is what I need.  I didn't realise that POST encoding and decoding allowed arrays.  Thanks all, I'll mark kicken's reply as the solution.

[Best way to get an array slice starting from 'current']

Thanks both

JSON array.  Well, if I had a hierarchical structure like JSON to work with I wouldn't need to ask this question.  Here's a print_r of the array, which is a bit closer to the structure I've actually got

Array
(
    [ec] => 3CB220804
    [ID] => 4A73-1549
    [FullName0] => Walter Mitty
    [email0] => walt@thurber.com
    [name0] => true
    [date00] => true
    [date10] => true
    [date20] => true
    [cost] => 90
)

Kicken, I do know the structure of the data so I know the key order.  I just can't easily change it.  I do indeed want to build a new array better suited to my needs, but my problem is that I can't find a way that isn't very clunky.

If I include []s in the POST string, e.g.

name[0]=true&date[0][0]=true&date[0][1]=true

[ and ] in fact have to be encoded as %5B and %5D respectively, but I can convert them back.  So the question becomes, Is there a way in PHP to take the string above and automatically create the array from it?  I can only think of calling eval() on each substring between the &s, and I think that may be frowned on.

[Best way to get an array slice starting from 'current']

I have an array created from URL-encoded POST data with repeating groups of elements.  The keys are name0, date0A, date0B, name1, date1A, date1B....

I know how many dates follow each name (2 in the example above but can be any number) and I want to create a new array containing the dates following each new name.  Using array_slice() is messy as it needs the starting index.  Is there an elegant way to get the next N elements of an array starting from the current element?

The code uses foreach with key => value.  I could use a for loop with a counter but this seems even clunkier.  Maybe I need to use a while loop with next() and an exit condition, but it would be nice to find something that just creates an array with the next N elements.  Using a callback function would be fine but I can't see it being any neater.

Yes I know POST data in JSON would have been nice but I'm working with what I've got!