pass parameter from client to server

[email protected] ("iccsi")
Newsgroups php.general
Message-ID <[email protected]> 
I have a select control on the form and need to pass value user select to my 
query parameter.
I just realized that user entry value is client side and query parameter is 
server side.
Are there any way to read client parameter to pass to server?

You information and help is great appreciated,

Regards,

Iccsi,
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