(refs #2882) fixed not to evaluate empty array in preg_match
(refs #2882) fixed not to evaluate empty array in preg_match

kashiwasan/symfony-advanced,C-nakajima/OpenPNE3,upsilon/travis-test,C-nakajima/OpenPNE3,nishizoe/OpenPNE3,kashiwasan/symfony-advanced,isaosano/OpenPNE3,ShinichiU/OpenPNE3,nishizoe/OpenPNE3,isaosano/OpenPNE3,upsilon/travis-test,ShinichiU/OpenPNE3,C-nakajima/OpenPNE3,C-nakajima/OpenPNE3,ShinichiU/OpenPNE3,ShinichiU/OpenPNE3,isaosano/OpenPNE3,isaosano/OpenPNE3