how to __construct?

I'm new to this and don't know how it works...

I want my commands.php to link with main.php but I don't know how.

 

I suggest learning what a constructor does and when it should be used before worrying about it. You can read a bit about it from php.net.

I assume your commands.php and main.php are supposed to be instances of Command and PluginBase, respectively? Show what you've tried so far.

 

PHP:

Main.php

<?php

namespace Kaz;

use pocketmine\plugin\PluginBase;
use pocketmine\event\player\PlayerJoinEvent;
use pocketmine\block\Block;
use  pocketmine\tile\Tile;
use pocketmine\command\CommandSender;
use pocketmine\command\Command;
use pocketmine\event\block\BlockBreakEvent;
use pocketmine\event\block\BlockPlaceEvent;
use pocketmine\event\Listener;
use pocketmine\Server;
use pocketmine\Player;
use pocketmine\event\entity\EntityDamageEvent;
use Kaz\Tasks\MyTask;
use pocketmine\utils\TextFormat as TF;
use pocketmine\inventory\Inventory;
use pocketmine\item\Item;
use pocketmine\math\Vector3;
use pocketmine\command\ConsoleCommandSender;
use pocketmine\scheduler\PluginTask;
use pocketmine\event\player\PlayerInteractEvent;
use pocketmine\level\format\Chunk;
use pocketmine\level\Level;
use Kaz\Commands;

class Main extends PluginBase implements Listener
{
    private $commands;

    public function onEnable()
    {
        $this->getServer()->getPluginManager()->registerEvents($this, $this);
        $this->getLogger()->info("§aKaz was enabled");
    }

    public function onDisable()
    {
        $this->getLogger()->info("§cKaz was disabled");
    }
}

Commands.php

PHP:

<?php

namespace Kaz;

use Kaz\Main;
use pocketmine\event\Listener;

class Commands implements Listener
{
    private $plugin;

    public function __construct(Main $plugin)
    {
        $this->plugin = $plugin;
    }
    public function onCommand(CommandSender $sender, Command $command, $label, array $args)
    {
        switch ($command->getName()) {

            case "kaz":

                $sender->sendMessage("§cCommands:\n§6-§7 /gmc\n§6-§7 /gms\n§6-§7 /awesome");
                return true;

 

I suggest looking at this tutorial over Plugin Commands. There are several ways to use commands in plugins, but you're a little off the mark. You don't need a Listener interface for commands. You can extend PluginCommand or Command in a second class, or, as shown in the thread above, you can handle commands with your main class. I strongly suggest using that method, as it is much simpler.

Other than that, you don't typically need to have 2 classes that implement the Listener interface, as one will do. If you were going to use a non-main class as the listener, you would need to use PluginManager->registerEvents with an instance of that class as the first parameter. The second parameter is fine.