You just need a basic html form like so...
<body>
<form method="post" action="add_info.php">
<p>
<input type="text" name="textfield">
name</p>
<p>
<textarea name="textarea"></textarea>
Comments</p>
<p>
<input type="submit" name="Submit" value="Send Info">
</p>
</form>
</body>
and when you submit have it go to this another page such as add_info.php with this code...
$name = $_POST['name'];
$comments = $_POST['comments'];
mysql_connect("example.com","username","password")or die(mysql_error());
mysql_select_db("flyerforce")or die(mysql_error());
mysql_query("INSERT INTO your_table_name VALUES('$name','comments')");
// optional header to take you to thank you page...//
header("Location: http://www.example.com/thanks.htm");
mysql_close();
Hope this helps!!