native client_cmd(index, const command, any:...);
Client index, use 0 to execute on all clients
Variable number of formatting parameters
Executes a command on the client.
Executing malicious commands on the client ("slowhacking") is frowned
Valve has introduced a command filter to Counter-Strike 1.6. It is not
possible to execute many commands if the client has opted in to this.
Length of formatted command string
If a single client is specified and the index is not within
the range of 1 to MaxClients, an error will be thrown.