olmuyo bak teker teker dosyaları veriyim ;
firmaekle.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Firma Ekle</title>
</head>

<body>
<form id="form1" name="form1" method="post" action="gonder.php">
  <label>Firma Adı
  <input type="text" name="firmaadi" id="firmaadi" />
  </label>
  <p>
    <label>Adres
    <input type="text" name="adres" id="adres" />
    </label></p>
  <p>
    <label>Telefon
    <input type="text" name="telefon" id="telefon" />
    </label>
  </p>
  <p>
    <label>
    <input type="submit" name="gonder" id="gonder" value="Gönder" />
    </label>
  </p>
</form>
</body>
</html>
gonder.php
<?
require_once "config.php";
foreach ($_POST as $key => $value) {
$$key = $value;
}
?>
<html>
<head>
<title>dsadsadsadas</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta http-equiv="content-language" content="tr">
</head>
<body>
<?
if ($yolla) {
$topla=mysql_query("insert into firmalar (id,FirmaAd,Adres,Telefon) values (null,'$firmaadi','$adres','$telefon')");
echo 'Eklendi';
exit;
}
?>
<form name="form1" method="post" action="gonder.php">
  <label>Firma Adı
  <input type="text" name="firmaadi" id="firmaadi" />
  </label>
  <p>
    <label>Adres
    <input type="text" name="adres" id="adres" />
    </label></p>
  <p>
    <label>Telefon
    <input type="text" name="telefon" id="telefon" />
    </label>
  </p>
  <p>
    <label>
    <input type="submit" name="yolla" id="yolla" value="Gönder" />
    </label>
  </p>
</form>
</body>
</html>
sql dosyası
-- phpMyAdmin SQL Dump
-- version 2.9.1.1
-- http://www.phpmyadmin.net
-- 
-- Anamakine: localhost
-- Üretim Zamanı: 26 Temmuz 2008 saat 21:06:06
-- Sunucu sürümü: 5.0.27
-- PHP Sürümü: 5.2.0
-- 
-- Veritabanı: `firma`
-- 

-- --------------------------------------------------------

-- 
-- Tablo yapısı: `firmalar`
-- 

CREATE TABLE `firmalar` (
  `ID` int(11) NOT NULL auto_increment,
  `FirmaAd` tinytext collate latin1_general_ci NOT NULL,
  `Adres` tinytext collate latin1_general_ci NOT NULL,
  `Telefon` tinytext collate latin1_general_ci NOT NULL,
  PRIMARY KEY  (`ID`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci AUTO_INCREMENT=2 ;

-- 
-- Tablo döküm verisi `firmalar`
-- 

INSERT INTO `firmalar` VALUES (1, 'Kavi Giyim', 'Uzun Çar?? Cad. No:48', '2141507');