OPRC

public Action:OnPlayerRunCmd(client, &buttons, &impulse, Float:vel[3], Float:angles[3], &weapon)
{
    if (IsSurvivor(client) && IsPlayerAlive(client) && IsFakeClient(client))
    {
        if (shoot[client])
        {
            buttons |= IN_ATTACK2;
        }
        else if (!shoot[client])
        {
            buttons |= ~ IN_ATTACK2
        }
    }
    return Plugin_Continue;
}