[BlackLineCnR]

Code:

public OnPlayerCommandPerformed(playerid, cmdtext[], success)
{
    if (!success)
    {
    }
    else
    {
    new Text:Unknow;
    Unknow = TextDrawCreate(318, 384, "Unknown Command");
    TextDrawFont(Unknow , 1);
    TextDrawLetterSize(Unknow , 0.6, 4.2);
    TextDrawColor(Unknow , 0xFFFFFFFF);
    TextDrawSetOutline(Unknow , 0);
    TextDrawSetProportional(Unknow , 1);
    TextDrawSetShadow(Unknow , 1);
	TextDrawShowForPlayer(playerid, Unknow);
	}
    return 1;
}

I added this textdraw, So whenever a player enters wrong command it will be shown but nothing is happening :/

[BlackLineCnR]

Sorry for bumping, And this textdraw isnt disappearing -_-

[FailerZ]

I really suggest you to use https://sampwiki.blast.hk/wiki/GameTextForPlayer for this case.

But if you really want to use textdraws you can create a timer https://sampwiki.blast.hk/wiki/SetTimerEx to hide it after time

Also you are creating the textdraw everytime, why not just create it under OnGameModeInit so you can then just show/hide it

Btw you have reversed the logic with that if statement, put the code under if(!success)

Example:

PHP Code:

public OnPlayerCommandPerformed(playerid, cmdtext[], success)
{
    if (!success)
    {
        GameTextForPlayer(playerid, "Unknown Command", 3000, 1);
    }
    return 1;
} 


[AlexMSK]

Simply creating on it's right function and using a timer to destroy it and make sure you read this > https://sampwiki.blast.hk/wiki/Textdraw


E.g code

PHP Code:

new Text:Unknow;
forward unkcmd(playerid);
public unkcmd(playerid)
{
    TextDrawHideForPlayer(playerid, Unknow);
    return 1;
}
public OnPlayerCommandPerformed(playerid, cmdtext[], success)
{
    if (!success)
    {
        TextDrawShowForPlayer(playerid, Unknow);
        SetTimerEx("unkcmd", 5000, false, "i", playerid);
    }
    return 1;
}
public OnGameModeInit()
{
    Unknow = TextDrawCreate(318, 384, "Unknown Command");
    TextDrawFont(Unknow , 1);
    TextDrawLetterSize(Unknow , 0.6, 4.2);
    TextDrawColor(Unknow , 0xFFFFFFFF);
    TextDrawSetOutline(Unknow , 0);
    TextDrawSetProportional(Unknow , 1);
    TextDrawSetShadow(Unknow , 1);
    return 1;
}