[The Woody]

Check if the ID is online if he is just simply

pawn Код:

format( string, sizeof( string ), "The ID that matches %s is %d.", GetName( id ), id );
SendClientMessage( playerid, WHITE, string );

EDIT: If you doesn't have "GetName" or something like that:

pawn Код:

stock GetName( playerid )
{
    new Name[ MAX_PLAYER_NAME ];
    
    if( IsPlayerConnected( playerid ) )
    {
        GetPlayerName( playerid, Name, sizeof( Name ) );
    }
    else
    {
        Name = "Disconnected/Nothing";
    }
    
    return Name;
}