if ( ($long > 180 || $long < -180) || ($lat > 90 || $lat < -90) || $long !~ /^([\d\-\.]+)$/ || $lat !~ /^([\d\-\.]+)$/ ) { ..show error here } #### ($long > 180 || $long < -180) || ($lat > 90 || $lat < -90)