How to find if player is Online?

How can I detect if the player is Online. I need to know if the player is on the server or not.

PHP:

if($player->isOnline()){
//
}

What do i set $player to and do i have to

PHP:

use

anything?

PHP:

use pocketmine\Player;

Want to know if the player (pseudo) is online? :

PHP:

$player = $event->getPlayer()->getName("Pseudo");
if($player->isOnline()){
//
}

PHP:

// Search for a player with a name that starts with $name or is $name
if($player = $this->getServer()->getPlayer($name)){
//Online
} else{
//Offline
}
// Search for a player with a name that is $name
if($player = $this->getServer()->getPlayerExact($name)){
//Online
} else{
//Offline
}


FIX

PHP:

if($player = $this->getServer()->getPlayer($name)){
//Online
} else{
//Offline
}

Oops ^^

Thank you guys!

Fixed, thanks

Wait how does that check if the player is online?

If he's not online it returns null

PHP:

$player->sendMessage("players count($this->players) !");

What the..?

What?.....

PHP:

public $players = [];

public function onJoin(PlayerJoinEvent $event){
  $player = $event->getPlayer();
  if(isset($this->players[$player->getName()])){
  $player->sendMessage("players online ? ".count($this->players)." !");
  }
}

Can you please don't go on your phone in school because it seems like you didn't listened when you learned to read

All i need is that right? I already defined $players as $challenged ($challenged is who is being challenged) and $name is the sender

Here is code this should help:

PHP:

<?php

namespace Hittmana\ChallengerPE;              

use pocketmine\event;
use pocketmine\Server;
use pocketmine\command\CommandSender;
use pocketmine\command\Command;
use pocketmine\plugin\PluginBase;
use pocketmine\Player;
use pocketmine\event\Listener;
class MainClass extends PluginBase implements Listener
{
    public function onEnable()
        {
        $this->getLogger()->info("ChallengerPE enabled v1.0.4");
        $this->getServer()->getPluginManager()->registerEvents($this, $this);
        }
    public function onDisable()
        {
        $this->getLogger()->info("ChallengerPE disabled v1.0.4");
        }
    public function onCommand(CommandSender $sender, Command $command, $label, array $args)
        {
        if($sender instanceof Player)
        {
            $name = $sender->getName();
            $challenged = $this->getServer()->getPlayer($args[0])->getDisplayName();  
            $thing = $args[1];
            if ($command->getName() === "challenge")
                {
                $player = $this->getPlayer()->getName($challenged);
                if ($challenged = $this->getServer()->getPlayer($challenged)){
                $this->getServer()->broadcastMessage($name . " challenges " . $challenged . " to " . $thing);
                }
                else
                {
                    $sender->sendMessage($challenged . "cant be found!");
                }
                }
        }
    }
}

It's normal I use my phone

Please stop posting invalid solutions.

First of all, what is meant by "the player"?

getPlayerExact is more practical for this purpose. You don't want to know that PEMapModder_ is online if you are checking if PEMapModder is online.