Pridanie Niekoho do tabuľky

<?php
@ini_set('error_reporting', E_ALL);
@ini_set("display_errors", "on"); 
error_reporting(E_ALL);

$CFG = array(
    'debug' => true,
    'host'  => 'localhost',
    'user'  => 'root',
    'psw'   => '',
    'db'    => 'test'
    );

function getRequest ($name, $default='')
    {
    return isset($_POST[$name]) ? $_POST[$name] : (isset($_GET[$name]) ? $_GET[$name] : $default);
    }

function sql($query)
    {
    global $CFG;
    global $conn;
    $result = mysql_query($query,$conn);
    if (!$result && $CFG['debug'])
        {echo die('Chyba mysql_query. ' . mysql_error());}
    return $result;
    }




$conn = mysql_connect($CFG['host'],$CFG['user'],$CFG['psw'])  or die ('Chyba mysql_connect. '   . mysql_error());
$db   = mysql_select_db($CFG['db']) or die ('Chyba mysql_select_db. ' . mysql_error());
sql("SET NAMES utf8");

$do    = getRequest('do');
$data  = array();
switch ($do)
    {
    case 1:    // insert uzivatele
        $data['name'] = getRequest('name');                //  - nacist data
        foreach ($data as $key=>$value)                    //  - upravit data pro query
            {$data[$key] = mysql_real_escape_string($value);}
        $query  = "INSERT INTO `x_users` (`%s`) VALUES ('%s')";
        $query  = sprintf($query,implode("`,`",array_keys($data)),implode("','",$data));
        echo $query;
        $result = sql($query);
        break;
    case 2:    // insert do mesice
        $data['iduser'] = getRequest('iduser');                //  - nacist data
        $data['month']  = getRequest('month');                //  - nacist data
        foreach ($data as $key=>$value)                    //  - upravit data pro query
            {$data[$key] = mysql_real_escape_string($value);}
        $query  = "INSERT INTO `x_months` (`%s`) VALUES ('%s')";
        $query  = sprintf($query,implode("`,`",array_keys($data)),implode("','",$data));
        echo $query;
        $result = sql($query);
        break;
    case 3:    // delete uzivatele z mesice
        $data['iduser'] = getRequest('iduser');                //  - nacist data
        $data['month']  = getRequest('month');                //  - nacist data
        foreach ($data as $key=>$value)                    //  - upravit data pro query
            {$data[$key] = "`".$key."`='".mysql_real_escape_string($value)."'";}
        $query = "DELETE FROM `x_months` WHERE %s";
        $query  = sprintf($query,implode(" AND ",$data));
        echo $query;
        $result = sql($query);
        break;
    case 4: // select uzivatelu z mesice
        $data['month'] = getRequest('month');                //  - nacist data
        foreach ($data as $key=>$value)                    //  - upravit data pro query
            {$data[$key] = "`".$key."`='".mysql_real_escape_string($value)."'";}
        $query = "SELECT CONCAT(`b`.`name`,'-',`b`.`iduser`) AS `name` FROM `x_months` `a` LEFT JOIN `x_users` `b` ON `b`.`iduser`=`a`.`iduser` WHERE %s";
        $query  = sprintf($query,implode(" AND ",$data));
        echo $query;
        $result = sql($query);
        $seznam = '';
        if ($result)
            {
            $seznam = array();
            while (($row = mysql_fetch_assoc($result))!==false)
                {
                $seznam[] = $row['name'];
                }
            $seznam = implode('<br>',$seznam);
            }
        echo '<p>Seznam zapsanych v mesici "'.$data['month'].'"</p><p>'.$seznam.'</p>';
        break;
    default: break;
    }
/*
CREATE TABLE `x_users` (
  `iduser`  int(10) unsigned NOT NULL auto_increment,
  `name`    varchar(40) default NULL,
  PRIMARY KEY  (`iduser`),
  INDEX `name` (`name`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 ;

CREATE TABLE `x_months` (
  `idmonth` int(10) unsigned NOT NULL auto_increment,
  `month`   int(10) unsigned default NULL,
  `iduser`  int(10) unsigned default NULL,
  PRIMARY KEY  (`idmonth`),
  INDEX `iduser` (`iduser`),
  INDEX `month` (`month`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 ;
*/

?>
<ul>
<li><a href="?do=1&name=Lojza">Pridej noveho Lojzu</a></li>
<li><a href="?do=2&iduser=1&month=5">Zapis uzivatele s id 1 do mesice 5</a></li>
<li><a href="?do=2&iduser=2&month=5">Zapis uzivatele s id 2 do mesice 5</a></li>
<li><a href="?do=2&iduser=3&month=5">Zapis uzivatele s id 3 do mesice 5</a></li>
<li><a href="?do=2&iduser=4&month=5">Zapis uzivatele s id 4 do mesice 5</a></li>
<li><a href="?do=2&iduser=5&month=5">Zapis uzivatele s id 5 do mesice 5</a></li>
<li><a href="?do=2&iduser=1&month=7">Zapis uzivatele s id 1 do mesice 7</a></li>
<li><a href="?do=2&iduser=2&month=7">Zapis uzivatele s id 2 do mesice 7</a></li>
<li><a href="?do=2&iduser=3&month=7">Zapis uzivatele s id 3 do mesice 7</a></li>
<li><a href="?do=3&iduser=5">Smaz uzivatele 5</a></li>
<li><a href="?do=4&month=5">Zobraz seznam lidi v mesici 5</a></li>
<li><a href="?do=4&month=7">Zobraz seznam lidi v mesici 7</a></li>
</ul>