Catch HighJump

Hello, Since a few months i have some jump hackers in our server
How to catch them by code?

 

You can check if position Y where player get to is higher than position where player get from. Example: (I do not have tested)

PHP:

public function onMove(PlayerMoveEvent $e){
   $p = $e->getPlayer();
   $f = $e->getFrom();
   $t = $e->getTo();
   $d = $f->distance($t);
   if($t > $f){
      if($d >= 3){
       if(!$p->hasEffect(Effect::JUMP_BOOST)){
             $p->kick("High jump", false);
           }
       }
   }
} 

EDIT: This code may cause some problems, when player is knockbacked

 

Https://github.com/driesboy/anticheat
I already have an antifly i only need to catch jump

 

i introduce to you 'PlayerJumpEvent'
https://github.com/pmmp/PocketMine-MP/blob/master/src/pocketmine/event/player/PlayerJumpEvent.php

 

which is almost useless but its triggered every time someone jumps