file_exists doesn't seem to work correctly

file_exists doesn't seem to work correctly

References

Reference NO 1

http://stackoverflow.com/questions/15189067/file-exists-doesnt-seem-to-work-correctly

Reference NO 2

http://board.phpbuilder.com/showthread.php?10271216-file_exists-doesn-t-seem-to-work-right

Reference NO 3

http://php.net/manual/en/function.file-exists.php

Reference NO 4

http://www.webdeveloper.com/forum/showthread.php?93985-file_exists-with-url

Reference NO 5

http://bytes.com/topic/php/answers/695170-file_exists-function-doesnt-return-value

Reference NO 6

http://forums.devshed.com/php-development-5/file-exists-returning-false-path-issues-852023.html

Reference NO 7

http://scn.sap.com/thread/3196052

Reference NO 8

http://www.daniweb.com/web-development/php/threads/379897/file_exists-not-working-correctly