-fakemp4="$(printf %s "${_POST[fakemp4]}" |sed -rn '/^yes$/{p;q};ano' )"
-watch="$(printf %s "${_POST[watch]}" |sed -rn '/^(240p|480p|download|raspi|player)$/{p;q};aplayer' )"
+fakemp4=$( validate "${_POST[fakemp4]}" yes no)
+watch=$( validate "${_POST[watch]}" '(240p|480p|download|raspi|player|server)' player)
+pagesize=$(validate "${_POST[pagesize]}" '[1-9][0-9]*' 50)