Why cant i send a message with variables?

i get the special but not the variables in between.

PHP:

<?php

namespace Buff;

use pocketmine\command\Command;
use pocketmine\command\CommandSender;
use pocketmine\Player;
use pocketmine\plugin\PluginBase;
use pocketmine\event\Listener;
use pocketmine\utils\Config;
use pocketmine\event\player\PlayerJoinEvent;
use pocketmine\command\ConsoleCommandSender;

class Main extends PluginBase implements Listener
{

    public function onEnable()
    {
        $this->getServer()->getPluginManager()->registerEvents($this, $this);
        @mkdir($this->getDataFolder());
        $this->cfg = new Config($this->getDataFolder() . "sp.yml", Config::YAML);
    }
    public function onJoin(PlayerJoinEvent $event)
    {
        $player = $event->getPlayer();
        $name = $player->getName();
        if($this->cfg->get($name) !== null) {
            $this->ss = $this->cfg->get($player.'+s');
            $this->sp = $this->cfg->get($player.'+p');
            $this->se = $this->cfg->get($player.'+e');
            $this->sc = $this->cfg->get($player.'+c');
            $this->si = $this->cfg->get($player.'+i');
            $this->sa = $this->cfg->get($player.'+a');
            $this->sl = $this->cfg->get($player.'+l');
            $this->sx = $this->cfg->get($player.'+ex');
        }else{
            $this->cfg->set("$name+s",0);
            $this->cfg->set("$name+p",0);
            $this->cfg->set("$name+e",0);
            $this->cfg->set("$name+c",0);
            $this->cfg->set("$name+i",0);
            $this->cfg->set("$name+a",0);
            $this->cfg->set("$name+l",0);
            $this->cfg->set("$name+ex",40);
            $this->cfg->set("$name lock", false);
            $this->cfg->save();
        }
    }
    public function onCommand(CommandSender $sender, Command $cmd, string $label, array $args): bool
    {
        switch ($cmd->getName()) {
            case 'sp':
                $sender->sendMessage("S:$this->ss, P:$this->sp, E:$this->se, C:$this->sc, I:$this->si, A:$this->sa, L:$this->sl, Extra:$this->sx");
                break;
            case 'set':
                $slk = $this->cfg->get("$sender lock");
                if($slk == false) {
                    if($args[1] == 's' or $args[1] == 'S') {
                        $this->cfg->set("$sender +s", $args[2]);
                        $this->sx -= $args[2];
                        $this->cfg->set("$sender +ex",$this->sx);
                        $this->cfg->save();
                    }
                }else{
                    $sender->sendMessage('gay');
                }
                break;
        }
        return true;
    }
}
?>[/CODE]

 

Oh my god that code physically hurts me and the childish error message for non-lock players is just the cherry on top.
As for fixing your issue, you need to use $sender->getName()

 

So I put the $sender->getName() instead of what? also i am not gonna keep the word in there for non locked players xd

 

Ditch that, the whole code is awful and not going to work without significant changes, I don't have time to do that right now, maybe ask someone one Discord