Group part of an array

[gamefreak13]

This is the output of my array (yes it outputs an empty array too):

Array
(
)
Array
(
    [0] => 6/9/2013 10:36:54 PM
    [1] => Medical
    [2] => BROADWAY AVE
    [3] => FAKE RD/BOGUS LN
    [4] => E42
)
Array
(
    [0] => 6/9/2013 10:36:54 PM
    [1] => Medical
    [2] => BROADWAY AVE
    [3] => FAKE RD/BOGUS LN
    [4] => MR40
)
Array
(
    [0] => 6/9/2013 10:29:01 PM
    [1] => Vehicle Rescue
    [2] => I-15 NB
    [3] => 
    [4] => E37
)
Array
(
    [0] => 6/9/2013 10:29:01 PM
    [1] => Vehicle Rescue
    [2] => I-15 NB
    [3] => 
    [4] => M37
)
Array
(
    [0] => 6/9/2013 10:29:01 PM
    [1] => Vehicle Rescue
    [2] => I-15 NB
    [3] => 
    [4] => MR38
)
Array
(
    [0] => 6/9/2013 10:28:21 PM
    [1] => Medical
    [2] => MAIN ST
    [3] => SOME ST/NOWHERE DR
    [4] => E33
)
Array
(
    [0] => 6/9/2013 10:28:21 PM
    [1] => Medical
    [2] => MAIN ST
    [3] => SOME ST/NOWHERE DR
    [4] => MR33
)

I need to combine [4] together (seperated by commas) if [0] through [3] are the same.

 

The naming is as follows:

 

0 = time

1 = type

2 = address

3 = cross streets

4 = units/apparatus

 

Desired output of the above array:

Array
(
    [0] => 6/9/2013 10:36:54 PM
    [1] => Medical
    [2] => BROADWAY AVE
    [3] => FAKE RD/BOGUS LN
    [4] => E42, MR40
)
Array
(
    [0] => 6/9/2013 10:29:01 PM
    [1] => Vehicle Rescue
    [2] => I-15 NB
    [3] => 
    [4] => E37, M37, MR38
)
Array
(
    [0] => 6/9/2013 10:28:21 PM
    [1] => Medical
    [2] => MAIN ST
    [3] => SOME ST/NOWHERE DR
    [4] => E33, MR33
)

[trq]

Cool. What have you tried?

[mac_gyver]

you already have a thread for this or for similar processing of your data. if this is the same type of processing, but for a different key in your array, the method will be exactly the same as in your previous thread. continue your problem in your existing thread.

[Barand]

I agree with mac_gyver. Do not double post the same problem.

[gamefreak13]

I double-posted because my other thread is far too in depth and confusing, so most members probably just skipped right over it. The suggestions are not working (probably because I changed the data structure to try to simplify things, but really it just made it impossible for me to use the suggestions). So I thought I'd simplify things by starting a new thread.