Value of variable is not stored correctly while transfering the value from HTML form to PHP file

Value of variable is not stored correctly while transfering the value from
HTML form to PHP file

References

Reference NO 1

http://stackoverflow.com/questions/15192749/value-of-variable-is-not-stored-correctly-while-transfering-the-value-from-html

Reference NO 2

http://php.net/manual/en/reserved.variables.session.php

Reference NO 3

http://bytes.com/topic/php/insights/664241-using-html-forms-pass-data-php

Reference NO 4

http://www.w3schools.com/php/php_filter.asp

Reference NO 5

http://www.astro.ufl.edu/~warner/prog/php.html

Reference NO 6

http://oreilly.com/catalog/webdbapps/chapter/ch08.html

Reference NO 7

http://www.phpro.org/tutorials/Introduction-To-PHP-Sessions.html

Reference NO 8

http://www.webmonkey.com/2010/02/php_tutorial_for_beginners/