There are two ways
1) Copy all the files of your joomla script and export your database
2) Use an extension: http://extensions.joomla.org/extensions/access-a-security/site-security/backup
I had this problem and believe me it was a big head ache just place the session_start(); on the top of the page just before the <?php tag and if you are including any common page that is included in all your scripts like include "filename.php"; then add the session_start(); on the top of it then...
If you are trying to do some authorization of some sort then i would suggest you use cUrl as many of the web hosts allow that support and its really easy to implement.
Ya as misson said it just set up a local server on your computer do all the editing and analyzing on it and finally test each page on the online server, but there is another catch some php extensions are available on some servers and on some are not so you have to make sure there is a way that...
Make it LIMIT 1 what LIMIT function does is that it selects the first row count number till the last row count number but if you only want to select a fixed amount of row then use only one digit like:
SELECT * FROM table_name ORDER BY RAND() LIMIT 1
This will select only the first row fetched...
Why not include the css and js files in the normal way like
<head>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.1.0-rc.1/jquery.mobile-1.1.0-rc.1.min.css" />
<script src="http://code.jquery.com/jquery-1.7.1.min.js"></script>
<script...
If possible then try to meet someone face to face because when mom's say not to talk to stranger's then she also meet on the Internet plus if possible then try to learn proper security measures yourself i mean that's the best part plus when the website traffic and popularity increases then it...
Well if you are planning not to put any expenses on the website security then believe me its a really bad idea you should always keep a check on how things are working around check out new hacking methods and security holes in your website i mean what if one day facebook gets hacked or even gets...
Just google it out and here is a tutorial but its based on windows xp so if you are having another os then please search it out
http://www.zdnetasia.com/configure-windows-xp-professional-to-be-a-vpn-server-39050037.htm