Return Split Data to Array/What Logic for Key Order?

[Sivakatirswami]

What is the logic behind returned array key order??

Take this (dummy) data submitted by a web form:

email=katir%40hindu.org&2+First=Siva&3+Last=Katirswami&4+add1=107+Kaholalele
+Road&5+add2=Tampines+Quarter&6+add3=+Nottingham+Sector&7+City=Kapaa&8+US_St
ate=HI&9+foreign_state=&10+Zip=96746&11+Country=USA&12+Phone=808-822-7032&13
+body=What+a+wonderful+web+site%21

process with this script:

  split aboveData by "&" and "="
  put the keys of aboveData

returns:

5 add2
7 City
8 US_State
9 foreign_state
10 Zip
12 Phone
11 Country
4 add1
3 Last
email
13 body
2 First
6 add3

?? returned order bears no relation whatsoever to input order?? why? and
what is the algorithm for the order of the keys returned? How to control it?

TIA!

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Sivakatirswami
Editor's Assistant/Production Manager
katir at hindu.org 
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