My plugin crashing

$player->setNameTag("$user"(LvL".$this->level->get($user).")");
This code has crashed my server plzz help me!

 

PHP:

$player->setNameTag($user . "LvL" . $this->level->get($user));

I do not understand your code, but if i remember correctly this fix your problem

 

This code

PHP:

public function onPlayerKill(PlayerDeathEvent $event) {
$ev = $event->getEntity()->getLastDamageCause();
if ($ev instanceof EntityDamageByEntityEvent) {
$player = $ev->getDamager();
$user = $player->getName();
$user2 = $user;
if($this->config->get("Lowercase save (save even if the player name is changed case as the same player)") == "on"){
$user2 = strtolower($user);
}
if($player instanceof Player) {
   $this->exp->set($user2,$this->exp->get($user2) + $this->expup->get($user2));
   $this->exp->save();

if($this->config->get("Level of display display") == "on"){
$player->setNameTag("$player->setNameTag($user . "(LvL" . $this->level->get($use) . ")");
$player->save();
}
if($this->config->get("Level of display display") == "on"){
$player->setDisplayName("§7[§aLv§e".$this->level->get($user2)."§7]".$user);
$player->save();
}
if($this->exp->get($user2) >= $this->levelup->get($user2)){
    $this->level->set($user2,$this->level->get($user2) + 1);
    $this->level->save();
    $this->exp->set($user2,"0");
    $this->exp->save();
    $this->levelup->set($user2,$this->levelup->get($user2) + $this->config->get("The amount of increase sometimes necessary Exp when you went up level"));
    $this->levelup->save();

if($this->config->get("Level of display display") == "on"){
$player->setNameTag("§7[§aLv§e".$this->level->get($user2)."§7]".$user);
$player->save();
}
if($this->config->get("Level of display display") == "on"){
$player->setDisplayName("§7[§aLv§e".$this->level->get($user2)."§7]".$user);
$player->save();
}
if($this->config->get("Level up at the time of the message (individual or all)") == "個人"){
$player->sendMessage("Level".$this->level->get($user2)."I went up to");
}else{
Server::getInstance()->broadcastMessage("".$user."Is level".$this->level->get($user2)."I went up to");
}
}else{
$exp = $this->levelup->get($user2) - $this->exp->get($user2);
$player->sendMessage("It is Exp of defeating the enemy".$this->expup->get($user2)."Up it was current and Exp".$this->exp->get($user2).", The remaining necessary to level up and Exp".$exp."is");
if($this->config->get("Level of display display") == "on"){
$player->setNameTag("$ user"(LvL".$this->level->get($user).")");
$player->save();
}
if($this->config->get("Level of display display") == "on"){
$player->setDisplayName("§7[§aLv§e".$this->level->get($user2)."§7]".$user);
$player->save();
}
}
$this->expup->set($user2,$this->expup->get($user2) + $this->config->get("Number to increase the number get Exp If you continuously kill"));
$this->expup->save();
}
}
}

 

PHP:

$player->setNameTag("$ user"(LvL".$this->level->get($user).")");

is badd

 

Plzz edit for me this code

 

Here

PHP:

public function onPlayerKill(PlayerDeathEvent $event) {
    $ev = $event->getEntity()->getLastDamageCause();
    if ($ev instanceof EntityDamageByEntityEvent) {
        $player = $ev->getDamager();
        $user = $player->getName();
        $user2 = $user;
        if($this->Config->get("Lowercase save (save even if the player name is changed case as the same player)") == "on"){
            $user2 = strtolower($user);
        }
        if($player instanceof Player) {
            $this->exp->set($user2,$this->exp->get($user2) + $this->expup->get($user2));
            $this->exp->save();

            if($this->Config->get("Level of display display") == "on"){
                $player->setNameTag($player->setNameTag($user . "LvL idk what you want make here with $user->getlevel blabla");
$player->save();
}
if($this->Config->get("Level of display display") == "on"){
$player->setDisplayName("§7[§aLv§e".$this->level->get($user2)."§7]".$user);
$player->save();
}
if($this->exp->get($user2) >= $this->levelup->get($user2)){
    $this->level->set($user2,$this->level->get($user2) + 1);
    $this->level->save();
    $this->exp->set($user2,"0");
    $this->exp->save();
    $this->levelup->set($user2,$this->levelup->get($user2) + $this->config->get("The amount of increase sometimes necessary Exp when you went up level"));
    $this->levelup->save();

if($this->Config->get("Level of display display") == "on"){
$player->setNameTag("§7[§aLv§e".$this->level->get($user2)."§7]".$user);
$player->save();
}
if($this->config->get("Level of display display") == "on"){
$player->setDisplayName("§7[§aLv§e".$this->level->get($user2)."§7]".$user);
$player->save();
}
if($this->config->get("Level up at the time of the message (individual or all)") == "個人"){
$player->sendMessage("Level".$this->level->get($user2)."I went up to");
}else{
Server::getInstance()->broadcastMessage("".$user."Is level".$this->level->get($user2)."I went up to");
}
}else{
$exp = $this->levelup->get($user2) - $this->exp->get($user2);
$player->sendMessage("It is Exp of defeating the enemy".$this->expup->get($user2)."Up it was current and Exp".$this->exp->get($user2).", The remaining necessary to level up and Exp".$exp."is");
if($this->Config->get("Level of display display") == "on"){
$player->setNameTag($user ."(LvL IDK WHAT YOU WANT MAKE here with level");
$player->save();
}
            if($this->Config->get("Level of display display") == "on"){
                $player->setDisplayName("§7[§aLv§e".$this->level->get($user2)."§7]".$user);
                $player->save();
            }
        }
        $this->expup->set($user2,$this->expup->get($user2) + $this->Config->get("Number to increase the number get Exp If you continuously kill"));
        $this->expup->save();
    }
}
}

 

This code crashed

PHP:

$this->config = new Config($this->getDataFolder() . "config.yml", Config::YAML,
array(
        'Exp that Nowak when defeated' => '50',
        '1 level level up necessary Exp of' => '50',
        'The amount of increase sometimes necessary Exp when you went up level' => '50',
        'Number to increase the number get Exp If you continuously kill' => '10',
        'Lowercase save (save even if the player name is changed case as the same player)' => 'on',
        'Level up at the time of the message (individual or all)' => '個人',
        'Examine other players level at the command' => 'on',
        'Level of tag display' => 'on',
        'Level of display display' => 'on,
        'Kills Death number display in the / level' => 'off',
        'You need Exp automatic correction' => 'on',
    'Experience bar display' => 'off'
));
$this->exp = new Config($this->getDataFolder() . "Exp.yml", Config::YAML,
array(
));
$this->level = new Config($this->getDataFolder() . "Level.yml", Config::YAML,
array(
));
$this->levelup = new Config($this->getDataFolder() . "Levelup.yml", Config::YAML,
array(
));
$this->killup = new Config($this->getDataFolder() . "killup.yml", Config::YAML,
array(
));
$this->expup = new Config($this->getDataFolder() . "expup.yml", Config::YAML,
array(
));
$this->kill = new Config($this->getDataFolder() . "kill.yml", Config::YAML,
array(
));
$this->death = new Config($this->getDataFolder() . "death.yml", Config::YAML,
array(
));