Today, I've received a personal mail/request from Sivanantham Hemamalini, working for IT leisure in Singapore. Since I was in company when received the mail, I couldn't answer immediately. If I understand the question right, it is about inputting Unicode texts especially Tamil in phpMyAdmin.
PhpMyAdmin's default characterset is iso-8859-1 and so if we enter anything in the form, browser will convert it into numerical html entities. Say for example, if we enter தமிழ் and submit the form, it will convert it to & #2980;& #2990;& #3007;& #2996;& #3021;. Because of this browser's behavior, it will be difficult to store the Unicode text as it is.
Immediate solution I could think of is changing or forcing the browser's character encoding into utf-8. In Mozilla Firefox, it can be set via View -> Character Encoding -> Unicode (UTF-8)
Another elegant solution might be changing the phpMyAdmin configurations so that it sends and sets proper charset in Content-Type header as Content-Type: text/html; charset=utf-8
To do this, we have to edit the config.inc.php file found at phpMyAdmin's root directory:
$cfg['DefaultCharset'] = 'utf-8'; and
$cfg['AllowAnywhereRecoding'] = true;
These change of configurations should send proper headers. Anyhow, if the lang cookie is already set to some other charset, it won't reflect the changes. So, one may need to clear the cookies to see the changes.