Forum PHP.pl

Witam wszystkich, jestem troche ciemny z php, wiec pisze w html. Lecz nie wiem kilka rzeczy, mianowicie
*czy da sie napisac logowanie i wylogowanie, potrzebuje jeszcze dodawanie nowych urzytkownikow od bazy danych. Mam baze na yoyo.
Coś takiego juz napisalem:

[HTML] pobierz, plaintext 
<[url="http://december.com/html/4/element/html.html"]html[/url]>
<[url="http://december.com/html/4/element/body.html"]body[/url]>
<[url="http://december.com/html/4/element/div.html"]div[/url] class="login">
                <[url="http://december.com/html/4/element/form.html"]form[/url] method="post" action="login" name="login">
                    <[url="http://december.com/html/4/element/span.html"]span[/url]>Username:</[url="http://december.com/html/4/element/span.html"]span[/url]>
                    <[url="http://december.com/html/4/element/input.html"]input[/url] name="login" type="text" size="22" style="height:18px; margin-right: 4px; font-size: 9px; font-family: sans-serif; color: #15598D;" />
                    <[url="http://december.com/html/4/element/span.html"]span[/url]>Password:</[url="http://december.com/html/4/element/span.html"]span[/url]>
                    <[url="http://december.com/html/4/element/input.html"]input[/url] name="pass" type="password" size="22" style="height:18px; font-size: 9px; font-family: sans-serif; color: #15598D;" />
                    <[url="http://december.com/html/4/element/input.html"]input[/url] type="submit" class="przycisk" value="Login" style="height:18px; width: 58px; font-size: 10px; font-weight: bolder;" />
                </[url="http://december.com/html/4/element/form.html"]form[/url]>
        </[url="http://december.com/html/4/element/div.html"]div[/url]>
<[url="http://december.com/html/4/element/center.html"]center[/url]>
<[url="http://december.com/html/4/element/script.html"]script[/url] language="javascript" src="filecabinet.js"></[url="http://december.com/html/4/element/script.html"]script[/url]>
</[url="http://december.com/html/4/element/center.html"]center[/url]>
<[url="http://december.com/html/4/element/head.html"]head[/url]>
<[url="http://december.com/html/4/element/center.html"]center[/url]>Strona glowna</[url="http://december.com/html/4/element/center.html"]center[/url]>
</[url="http://december.com/html/4/element/head.html"]head[/url]>
</[url="http://december.com/html/4/element/body.html"]body[/url]>
</[url="http://december.com/html/4/element/html.html"]html[/url]>
[HTML] pobierz, plaintext