Something

if(strcmp(cmd,"/getlevel",true) == 0){
	if(!IsPlayerLevel(playerid,10)){
		SendClientMessage(playerid,COLOR_AGREEN,"You need to be a level 10 to do this");
		return 1;
	}
	tmp = strtok(cmdtext,idx);
	if(!strlen(tmp)){
		SendClientMessage(playerid, COLOR_AGREEN,"Usage: /getlevel <player_id>");
		return 1;
	}
	new pid = strval(tmp);
	if(!IsPlayerConnected(pid)){
		SendClientMessage(playerid,COLOR_AGREEN,"Invalid Player ID to get the level of.");
		return 1;
	}
	new name[MAX_PLAYER_NAME];
	GetPlayerName(playerid,name,sizeof(name));
	format(string,sizeof(string),"%s (ID:%d) Level = %d",name,pid,Level[pid]);
	SendClientMessage(playerid,COLOR_AGREEN,string);
	return 1;
}