Why there r two functions (do post & do get)

why there r two functions doget() & dopost() while any code can run in any of them and give me the same result.
sure, here is difference but what this difference ?
thnx in advance

thnx shudha
this thread is very good, i pasted it here to clear the vision for otheres too:
There are two points between GET and POST
01) Amount of information u can get.
02) Post is secure for getting Passwords and credit cards numbers.
GET puts the form values into the URL string. GET is limited to about 256 characters (usually a browser limitation) and creates really ugly URLs.
POST allows you to have extremely dense forms and pass that to the server without clutter or limitation in size. e.g. you obviously can't send a file from the client to the server via GET.
Below lines are from http://www.microsoft.com/windows2000/techinfo/reskit/en/iisbook/c06_the_difference_between_get_and_post.htm
QUOTE
The GET method, which was used in the example earlier, appends name/value pairs to the URL. Unfortunately, the length of a URL is limited, so this method only works if there are only a few parameters. The URL could be truncated if the form uses a large number of parameters, or if the parameters contain large amounts of data. Also, parameters passed on the URL are visible in the address field of the browser�not the best place for a password to be displayed.
The alternative to the GET method is the POST method. This method packages the name/value pairs inside the body of the HTTP request, which makes for a cleaner URL and imposes no size limitations on the form�s output. It is also more secure.
UNQUOTE
Hope abv will help.

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Why there r two functions (do post & do get)

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