1)How would you add/remove something in a array with a form?

2)How can you find certian sessions on the server? IE finding a session where $_SESSION['username']; is bob.

3)What about listing current sessions?

4)Say you had a folder called admin. In it were a bunch of scripts for adminstration of a site. Say you also had a folder called includes that was seperate from the admin folder. In a script inside the admin folder, how would you include a script from the includes folder without including the full url of the site? Basicly, how would you include or access a file from a folder outside the curent one without urls?


I think thats all for now.

1) I would take the form data and rebuild the old array with current data information.

2 & 3) If you designate the save path to store the sessions, you can iterate through each session file created there. Probably the most effecient way is to create a "Who's Online" table in mysql and refer to that for current live users.

4) You can include other server files by server root path (/home/user/public_html/includes/file.php) or relateive (../includes/file.php)

Thanks for replying

1)Hmm... there should be a more efficient way

2&3)I guess that would make sence for the mysql users online thing.. You could have it so that when they log in, updates the database and when they log out they get removed from the database. Problem with doing it like that though is what if they just close the browser?

4)Ohhhh. (../includes/file.php) Does the ".." in that represent somthing or is that just how you put it?

unset() is used for deleting array items. Just dont do something like unset($arrayName), be sure to use the key as well; unset($arrayName[$key]).

Full stops and forward slashes are used for relative paths. Ask Mr Google for articles about 'relative path name'. Be warned though, relative path names are interpreted differently by linux/unix and windows based servers. A more robust, x-platform method of including/requiring files is to build absolute paths from web app constant values; for e.g. $siteURL='http://www.domain.com/'; include ( $siteURL.'includes/file.php');.

Originally Posted by Slick Nick

4)Ohhhh. (../includes/file.php) Does the ".." in that represent somthing or is that just how you put it?

".." means to relatively backup one directory. When you place it in your code like mgraphic mentions it tells the script to go back a folder and look for the file.

Originally Posted by metho

A more robust, x-platform method of including/requiring files is to build absolute paths from web app constant values; for e.g. $siteURL='http://www.domain.com/'; include ( $siteURL.'includes/file.php');.

I use this method also. When coding it this way, it makes it easier if you're going to be using the same code on a different site. All you would need to do is change the domain name and everything else is done.