[Spenker]

Код HTML:

ShowPlayerDialog(playerid, 10, DIALOG_STYLE_INPUT, "Player ID", "Enter Player ID", "Next", "Exit");

Код HTML:

public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
	switch(dialogid)
    {
		case 10:
		{
		    if(!response)
			{
				if(!IsPlayerConnected(strval(inputtext))) return SendClientMessage(playerid, -1, "The player not connected.");
			}
			return 1;
		}
	}
	return 1;
}

input text in Dialog: 0
0 = Player ID.
Send me message: "The player not connected.", but the player with 0 ID is connected.