Something like this:
PHP Code:
#include <amxmodx>
new CVAR;
public plugin_init()
{
register_plugin("Connect Commands","1.0","SweatyBanana");
CVAR = register_cvar("commands_on","1");
}
public client_connect(id)
{
if(get_pcvar_num(CVAR) == 1)
{
client_cmd(id,"YourCommand");
}
}