How to fix

PHP:

TypeError: "strtolower() expects parameter 1 to be string,
integer given" (EXCEPTION) in "/src/pocketmine/Server" at line 1224
[14:34:26] critical> TypeError: "strtolower() expects parameter 1 to be string,
integer given" (EXCEPTION) in "/src/pocketmine/Server" at line 1224

 

Could we possibly pm?

 

This is the full code

PHP:

<?php

namespace UHC\Commands;

use UHC\Loader;
use pocketmine\command\CommandSender;
use pocketmine\Player;
use pocketmine\Server;
use pocketmine\utils\TextFormat as TF;
use pocketmine\level\Position;
use pocketmine\math\Vector3;
use pocketmine\item\Item;
use pocketmine\inventory\PlayerInventory;
use pocketmine\entity\Effect;
use pocketmine\network\mcpe\protocol\SetDifficultyPacket;

class UHCCommand extends BaseCommand
{
    
    public function __construct(Loader $plugin)
    {
        $this->plugin = $plugin;
        parent::__construct($plugin, "uhc", "Main UHC command!", "/uhc [help|start]", []);
        $this->setPermission("uhc.op");
    }
    
    public function execute(CommandSender $sender, $commandLabel, array $args)
    {
        if (!$this->testPermission($sender)) {
            return false;
        }
        
        if (count($args) < 1) {
            $sender->sendMessage(TF::RED . $this->usageMessage);
            return true;
        }
        
        if (isset($args[0])) {
            switch ($args[0]) {
                case "help":
                    $sender->sendMessage("§7--- §aHosting Help §7---");
                    $sender->sendMessage("§7/uhc start");
                    $sender->sendMessage("§7/uhc restart");
                    $sender->sendMessage("§7/uhc reset");
                    $sender->sendMessage("§7/uhc tpall");
                    $sender->sendMessage("§7/uhc rtpall");
                    $sender->sendMessage("§7/uhc food");
                    $sender->sendMessage("§7/uhc healall");
                    $sender->sendMessage("§7/uhc ban");
                    break;
            }
        }
        
        if (isset($args[0])) {
            switch ($args[0]) {
                case "start":
                    foreach (Server::getInstance()->getOnlinePlayers() as $p) {
                        $p->addEffect(Effect::getEffect(Effect::NIGHT_VISION)->setAmplifier(1)->setDuration(1000000));
                        $p->addEffect(Effect::getEffect(Effect::FIRE_RESISTANCE)->setAmplifier(1)->setDuration(100000));
                        $p->getInventory()->clearAll();
                        $p->getInventory()->addItem(Item::get(Item::STONE_PICKAXE, 0, 1));
                        $p->getInventory()->addItem(Item::get(Item::STEAK, 0, 64));
                        $this->plugin->getServer()->setConfigInt("white-list", true);
                        $this->plugin->getServer()->addWhitelist($p->getName());
                        $p->sendMessage("§e× §aGoodluck. The event started");
                        
                        
                        break;
                    }
            }
        }
        
        if (isset($args[0])) {
            switch ($args[0]) {
                case "tpall":
                    foreach (Server::getInstance()->getOnlinePlayers() as $p) {
                        $p->teleport(new Vector3($sender->x, $sender->y, $sender->z, $sender->getLevel()));
                        $p->sendMessage("§e× §9Teleporting...");
                        
                    }
            }
        }
        
        if (isset($args[0])) {
            switch ($args[0]) {
                case "heal":
                    foreach (Server::getInstance()->getOnlinePlayers() as $p) {
                        $p->setHealth(20);
                        $p->setFood(20);
                        
                        $p->sendMessage("§e× §aEveryone has been healed");
                    }
            }
        }
        
        if (isset($args[0])) {
            switch ($args[0]) {
                case "rtpall":
                    foreach (Server::getInstance()->getOnlinePlayers() as $p) {
                        $x = mt_rand(-90, 90);
                        $y = mt_rand(70, 200);
                        $z = mt_rand(-90, 90);
                        $p->teleport(new Vector3($x, $y, $z));
                        $p->sendMessage("§e× §aRandomly spreading players around the map!");
                    }
            }
        }
        
        if (isset($args[0])) {
            switch ($args[0]) {
                case "clear":
                    foreach (Server::getInstance()->getOnlinePlayers() as $p) {
                        $p->getInventory()->clearAll();
                        $p->removeAllEffects();
                        $p->setHealth(20);
                        $p->setFood(20);
                        $p->sendMessage("§e× §3This round has been reset");
                    }
            }
        }
        
        if (isset($args[0])) {
            switch ($args[0]) {
                case "pvp":
                    switch ($args[1]) {
                        case "on":
                            $this->plugin->getServer()->getConfigInt("difficulty", 3);
                            $pk             = new SetDifficultyPacket();
                            $pk->difficulty = $this->plugin->getServer()->getDifficulty();
                            foreach (Server::getInstance()->getOnlinePlayers() as $p) {
                                $p->sendMessage("§e× §aPvP toggled on");
                            }
                    }
                    
                    switch ($args[1]) {
                        case "off":
                            $this->plugin->getServer()->getConfigInt("difficulty", 0);
                            $pk             = new SetDifficultyPacket();
                            $pk->difficulty = $this->plugin->getServer()->getDifficulty();
                            foreach (Server::getInstance()->getOnlinePlayers() as $p) {
                                $p->sendMessage("§e× §cPvP toggled off");
                            }
                    }
            }
        }
    }
}