Questions about EXP and Lava&Water Collisions

Hey all,

I'd like to know if there's anyway to take away player's exp? I couldn't find any and I've been searching for hours now but still no clue, and so is lava + water collisions event - that makes cobblestone < I'd like to use this event ( if there's even one >_> ) to create oregen plugin If you know something related to these two please let me know

Thank you ;d

 

It should work by using a negative integer in /xp...

 

$player->takeXp();

or

$player->takeXpLevel();

 

wtf? in which spoon do these functions exist? Please do not post random functions without any context and explanation. These functions do not exist in pocketmine\Player (also not in Human and Entity)

 

It's

PHP:

$player->setXpLevel();

$player is Player

 

what is that