function newBan($user_message) 
{
	global $mysqli;
	$command = explode(" ", $user_message);
	if(count($command) >= 2) {
		$toban   = $command[1];
		if(!empty($toban)) {
			if(usernameExists($toban)) {
				$begin = time();
				if(isset($command[2])) {
					switch ($command[2]) {
						case '10m' : $length = 10 * 60; $duration = '10 minutes'; break;
						case '30m' : $length = 30 * 60; $duration = '30 minutes'; break;
						case '1h'  : $length = 60 * 60; $duration = '1 hour'; break;
						case '1d'  : $length = 24 * 60 * 60; $duration = '1 day'; break;
						case '1w'  : $length = 7 * 24 * 60 * 60; $duration = '1 week'; break;
						default    : return;
					}
				}else{
					$length   = 5 * 60; 
					$duration = '5 minutes';
				}
				$end  = $begin + $length;
				$stmt = $mysqli->prepare("INSERT INTO uc_chat_bans (username,starttime,endtime,duration) VALUES (?,?,?,?)");
				$stmt->bind_param('siis',$toban,$begin,$end,$duration);
				$stmt->execute();
				$stmt->close();
				$ban_nme = 'System';
				$ban_msg = '** '.security($toban).' has been banned from chat for '.security($duration).'**';
				$ban_col = '000000';
				$ban_now = time();
				$stmt = $mysqli->prepare("INSERT INTO uc_chat_msg (username,message,color,timestamp) VALUES (?,?,?,?);");
				$stmt->bind_param('sssi',$ban_nme,$ban_msg,$ban_col,$ban_now);
				$stmt->execute();
				$stmt->close();
				$response_text = mask(json_encode(array('type'=>'userban', 'toban'=>$toban, 'bantime'=>$duration)));
				send_message($response_text); //send data
			}
		}
	}
}