<?
$db = mysql_connect ("localhost","root","");
mysql_select_db ("test",$db);
if($_GET["act"] == "add"){
if($_POST["title"] && $_POST["descript"]){
$sql="INSERT INTO pages (title, descript)
VALUES
('$_POST[title]','$_POST[descript]')";

if (!mysql_query($sql,$db))
   {
   die('Error: ' . mysql_error());
   }
die("Все ок<br><a href='?aсt=add'>Назад</a>");
}
die ('  
   <FORM action="admin.php?act=add" method="post">
     <P>
     title: <INPUT type="text" name="title"><BR>
     descript: <textarea name="descript" cols="40" rows="3">descript</textarea><BR>
     <INPUT type="submit" value="Добавить">  
     </P>
  </FORM>');
}
?>
<a href="?act=add">Добавить страницу</a>

CREATE TABLE IF NOT EXISTS `pages` (
    `id` int(11) NOT NULL AUTO_INCREMENT,
    `title` text NOT NULL,
    `descript` longtext NOT NULL,
    PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=cp1251 AUTO_INCREMENT=4 ;