[JetForever]

OK. I will try to explain you.
Using keys(enter, space etc..)
public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
On this calback you can use keys.
Where is link of all keys who you can use:https://sampwiki.blast.hk/wiki/Keys
example:

Quote:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys) { if (playeradmin[playerid]//If player is admin { GameTextForPlayer(playerid, "~w~Yea you are admin!",5000,1);//Show text for player if (newkeys)//if any button pressed from this site which are described https://sampwiki.blast.hk/wiki/Keys { GameTextForPlayer(playerid, "~w~Yea you are admin and you pressed button!",5000,1);//Show text } } }

Quote:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys) { if (PlayerIsCop[playerid]/If player is Cop { GameTextForPlayer(playerid, "~w~Yea you are Cop!",5000,1);//Show text for player if (newkeys == KEY_CROUCH )//Is shows how to use buttons KEY_CROUCH is c button { GameTextForPlayer(playerid, "~w~Yea you are Cop and pressed C button!",5000,1);//Show text for player } } }

To use mysql you need server like Wamp or something like that. Create database and tables in phpmyadmin and when is hardest part left: Write code in pawn. If you will use mysql when use R7 plugin.Where is link how to use it https://sampforum.blast.hk/showthread.php?tid=337810
Sorry for bad english
If I helped +Rep