Fix an issue that threw PHP warnings 'empty substring'
Fix an issue that threw PHP warnings 'empty substring'

forkcms/forkcms,jeroendesloovere/forkcms,matthiasmullie/forkcms,carakas/forkcms,jacob-v-dam/forkcms,jonasdekeukelaere/forkcms,Katrienvh/forkcms,Thijzer/forkcms,vytsci/forkcms,Katrienvh/forkcms,nosnickid/forkcms,riadvice/forkcms,vytsci/forkcms,jonasdekeukelaere/forkcms,bartdc/forkcms,DegradationOfMankind/forkcms,jeroendesloovere/forkcms,riadvice/forkcms,ikoene/forkcms,jessedobbelaere/forkcms,DegradationOfMankind/forkcms,Katrienvh/forkcms,ikoene/forkcms,justcarakas/forkcms,vytsci/forkcms,justcarakas/forkcms,jacob-v-dam/forkcms,carakas/forkcms,wengyulin/forkcms,jeroendesloovere/forkcms,vytenizs/forkcms,WouterSioen/forkcms,nosnickid/forkcms,jessedobbelaere/forkcms,sumocoders/forkcms,dmoerman/forkcms,sumocoders/forkcms,Saxithon/gh-pages,WouterSioen/forkcms,forkcms/forkcms,nosnickid/forkcms,jacob-v-dam/forkcms,dmoerman/forkcms,jonasdekeukelaere/forkcms,jonasdekeukelaere/forkcms,wengyulin/forkcms,mathiashelin/forkcms,carakas/forkcms,matthiasmullie/forkcms,dmoerman/forkcms,tommyvdv/forkcms,sumocoders/forkcms,forkcms/forkcms,tommyvdv/forkcms,riadvice/forkcms,Katrienvh/forkcms,DegradationOfMankind/forkcms,sumocoders/forkcms,mathiashelin/forkcms,tommyvdv/forkcms,justcarakas/forkcms,jacob-v-dam/forkcms,carakas/forkcms,bartdc/forkcms,mathiashelin/forkcms,jessedobbelaere/forkcms,wengyulin/forkcms,DegradationOfMankind/forkcms,carakas/forkcms,forkcms/forkcms,bartdc/forkcms,riadvice/forkcms,Thijzer/forkcms,Saxithon/gh-pages,mathiashelin/forkcms,ikoene/forkcms,matthiasmullie/forkcms,jonasdekeukelaere/forkcms,tommyvdv/forkcms,Thijzer/forkcms,jessedobbelaere/forkcms,vytenizs/forkcms,vytenizs/forkcms,jeroendesloovere/forkcms,sumocoders/forkcms