php preg_match doesn't give expected result [duplicate]

php preg_match doesn't give expected result [duplicate]

References

Reference NO 1

http://stackoverflow.com/questions/13582071/php-preg-match-doesnt-give-expected-result

Reference NO 2

http://stackoverflow.com/questions/17596841/how-to-find-date-difference-excluding-specific-dates-in-array-php

Reference NO 3

http://php.net/manual/en/function.preg-replace.php

Reference NO 4

http://php.net/manual/en/function.glob.php

Reference NO 5

http://docs.behat.org/guides/2.definitions.html

Reference NO 6

http://www.solutionoferror.com/php/uploading-files-in-phpfox-closed-50587.asp

Reference NO 7

https://drupal.org/node/360605

Reference NO 8

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