need help making Cooperative Kill death ratio All requirements here

need help making a KDR kill death ratio plugin

Requirements:
- Track every kill and death
- Save them on a yml file or json
- Import all pocketmine required classes for it
- on /kdr command tell player his kdr incluying his total kills and deaths
- on /kdr show the kdr (e.g. Player killed 1 player and has died 3 times the kill death ratio would be 1.00) (it should add the .00)

Max time: tomorrow
This plugin must be done tomorrow

Just reply starting it as a new Main.php file from start.

 

I got this for kdr
$kdr = sprintf("%.2f", $kc/$dc);
Now the top kdr
5?

 

$kdr = round($kc/$dc);

 

Feel free to take look through this old (crappy) plugin I wrote over a year ago. https://github.com/JackNoordhuis/PocketMine-MP-Plugins/tree/master/PvP-Stats

 

#Advertising...
I've been working on a plugin to keep track of these things. You can see the KDA with /stats because it tracks assists as well. The formula to calculate KDA is (kills + assists) / deaths.
https://github.com/BlockHorizons/KillCounter