Why does this `$_SESSION['name'] = $_POST['name'] fail? [closed]

Why does this `$_SESSION['name'] = $_POST['name'] fail? [closed]

References

Reference NO 1

http://stackoverflow.com/questions/15195133/why-does-this-sessionname-postname-fail

Reference NO 2

http://stackoverflow.com/questions/16518947/how-do-validate-html-forms-when-i-use-session-over-more-pages

Reference NO 3

http://php.net/manual/en/session.examples.php

Reference NO 4

http://www.trans4mind.com/personal_development/phpTutorial/sessionStart2.htm

Reference NO 5

http://www.toves.org/books/php/ch14-sessions/

Reference NO 6

http://www.allinterview.com/showanswers/95640.html

Reference NO 7

http://webdevrefinery.com/forums/topic/11844-php-or-html-error-in-my-code/

Reference NO 8

http://devzone.zend.com/16/php-101-part-10-a-session-in-the-cookie-jar/