[claudiuhks]

PHP Code:

// VOID = void
// PENTITY = edict_t *
// CPCHAR = const char *
// MAX_ARGS = 1024
// SIZE_T = size_t
// #include <string> // std::string
// ISPLR = #define ISPLR(PlrId) (PlrId >= 1 && PlrId <= gpGlobals->maxClients)
// g_pMetaGlobalVars->Result = Result; = RETURN_META(Result);

// CLIENT SENDS COMMAND
//
VOID onClientCommand(PENTITY pEntity)
{
    // ARGUMENTS HANDLE
    //
    static CPCHAR pArgs[MAX_ARGS];

    // GETS CLIENT ID
    //
    SIZE_T entityId = g_engFuncs.pfnIndexOfEdict(pEntity);

    // METAMOD RESULT
    //
    METARESULT Result = MRES_IGNORED;

    // ARGUMENTS STRING (NO COMMAND)
    //
    std::string argStr = "";

    // VALID PLAYER
    //
    if (ISPLR(entityId))
    {
        // ARGUMENTS COUNT
        //
        SIZE_T argsCount = g_engFuncs.pfnCmdArgc();

        // ARGUMENTS HAVE PASSED
        if (argsCount > 0)
        {
            // ITERATES BETWEEN ARGUMENTS
            //
            for (SIZE_T Iterator = 0; Iterator < argsCount; Iterator++)
            {
                // FILLS UP pArgs
                pArgs[Iterator] = g_engFuncs.pfnCmdArgv(Iterator);

                // NO MORE VALIDITY CHECKS
                // IT'S KNOWN HOW MANY ARGUMENTS HAVE PASSED
                // SKIPS COMMAND NAME AS WELL
                //
                if (Iterator > 0)
                {
                    // APPEND ARGUMENT TO STRING
                    //
                    argStr += pArgs[Iterator];

                    // ADDS SPACE IF NEEDED (UNTIL THE LAST ARGUMENT IS REACHED)
                    //
                    if (Iterator != argsCount - 1)
                        argStr += " ";
                };
            };

            // ITERATES BETWEEN COMMANDS
            //
            for (SIZE_T Iterator = 0; Iterator < g_cmdsMan.Size(); Iterator++)
            {
                // CASE INSENSITIVE
                //
                if (stricmp(g_cmdsMan.m_Cmds.at(Iterator).m_Name.c_str(), pArgs[0]) == 0)
                {
                    // EXECUTES
                    //
                    g_cmdsMan.Exec(Iterator, pEntity, entityId, argsCount, pArgs, argStr);

                    // SUPERCEDES
                    //
                    g_pMetaGlobalVars->Result = MRES_SUPERCEDE;
                    return;
                };
            };

            // MENUS
            //
            if (stricmp(pArgs[0], "MenuSelect") == 0 && pArgs[1] && g_Plr[entityId].menuId != INVALID_NUMBER)
            {
                // GETS ITEM ID
                SIZE_T ItemID = atoi(pArgs[1]) - 1;

                // CHECKS IF MENU HAS THAT ITEM
                //
                if (g_menusMan.m_Menus.at(g_Plr[entityId].menuId).m_Keys & (1 << ItemID))
                {
                    // EXECUTES
                    //
                    g_menusMan.Exec(entityId, g_Plr[entityId].menuId, ItemID);

                    // PLAYER HAS NO LONGER MENU
                    //
                    g_Plr[entityId].menuId = INVALID_NUMBER;
                };
            };

            // SAY COMMAND
            //
            if (stricmp(pArgs[0], "Say") == 0)
            {
                // VALID ARGUMENT
                //
                if (pArgs[1])
                {

                };
            };
        };
    };

    // SETS RESULT AND QUIT
    //
    g_pMetaGlobalVars->Result = Result;
}; 


Also consider Bos93's post.
And don't forget about moduleconfig.h, uncomment (remove '//') from the front of ClientCommand...