help /command

how to make a command / command <Playername>
shown that the player ip

PHP:

public function onCommand(CommandSender $sender, Command $cmd, $label, array $args) {
        $fcmd = $cmd->getName(); # Get command name
        if(strtolower($fcmd) === "command"){ # Check if he is executing /command
            if(isset($args[0])){ # /command <this is args[0]> <this is args[1]> etc...
                $player = $this->plugin->getServer()->getPlayer($args[0]); # The string args[0] will be a Player object.
                if($player instanceof Player){  # Check if it's a valid player.
                    $sender->sendMessage($player->getName() . " address is " . $player->getAddress());
                }
            }
        }
    }

thank you

I would rather use

PHP:

if(!empty($args[0])){

http://stackoverflow.com/a/1219550/3990767

I know the difference. I am using !empty() because it still returns false even when I only have Spaces in the command, while isset() returns true

But in that case, what about this command?

Code:

/cmd  something

$args[0] is empty but isset. But you may make it impossible to detect the second argument.
Sometimes, these things are done on purpose

Yes, but why checking if $args[0] is a player when you already know it's empty?

What we should really be doing is

PHP:

$args = array_filter($args);