Someone

public OnPlayerDisconnect(playerid)
{
	new File:stats = fopen("stats.txt", io_append);
	new pname[MAX_PLAYER_NAME];
	new str[256], /*str2[256],*/ str3[256];
	GetPlayerName(playerid, pname, 256);
	while(fread(stats, str)) {
	    if(strcmp(str, pname, true, strlen(pname))==0) {
	    	format(str3, 256, "%d %d", gPlayerDeaths[playerid], gPlayerKills[playerid]);
	        strdel(str, strlen(pname), strlen(pname)+4);
	        strins(str, str3, strlen(pname)+1);
		 	//format(str2, sizeof(str2), "\n%s %d %d\n", pname, gPlayerDeaths[playerid], gPlayerKills[playerid]);
		  	fwrite(stats, str);
		}
	}
	fclose(stats);
   	return 1;
}