Error plugin.

Please help me I Have a Error, and i don't know where it. Please, help and read more, because it is my first redesigned plugin. I'm from Russia, and ignore errors

PHP:

<?php

/*
__PocketMine Plugin__
name=SignPro
description= Live Signs at its best!
version=1.0
author=NIM
class=Sign
apiversion=11
*/

class Sign implements Plugin{
    private $api, $server;
    public function __construct(ServerAPI $api, $server = false){
        $this->api = $api;
        $this->server = ServerAPI::request();
    }

    public function init(){
        $this->api->addHandler("tile.update", array($this, "eventHandler"), 10);
    }

    public function eventHandler($data, $event){
        switch ($event) {
            case "tile.update":
                if ($data->class === TILE_SIGN) {
                    if($data->data["Monitor"] == "MONITOR" or $data->data["Монитор"] == "MONITOR"){
                  return;
                    $data->setText(".count($this->api->player->getAll())."/".$this->server->maxClients)).", "MONITOR", "PLAYERS");
                    break;
                   
                    }
                  public function __destruct(){
    }
}


That's not your plugin.

I say: redesigned! Please..

Do you know what is the $data field?

In a sign tile, the $data field is an array containing four contents, with the keys "Text1" to "Text4".

According to https://github.com/PocketMine/PocketMine-MP/blob/master/src/world/Tile.php, there is no such array content called "MONITOR" or its Russian.

It is could it be? it?

Code:

 public function setText($line1 = "", $line2 = "", $line3 = "", $line4 = ""){
                if($this->class !== TILE_SIGN){
                        return false;
                }
                $this->data["Text1"] = $line1;
                $this->data["Text2"] = $line2;
                $this->data["Text3"] = $line3;
                $this->data["Text4"] = $line4;
                $this->server->api->tile->spawnToAll($this);       
                $this->server->handle("tile.update", $this);
                return true;
        }

It is this code? I am noob

Yes.
First, what did you want to do in the first place?
Second, you should only call the public function setText() and not anything else to change a sign's text.

I want that when you click that it was written in the chat. Sorry, i'm use translate, because don't know in English someone words

You mean you want to send a sign's text to the player by chat?

Refer to SignConsole.

No, I want a: if player touch a sign, chat sent to player personal sms.

What is personal sms?

to only the player went SMS