24 replies to this topic

[Stuart]

Is there a way to get a link to call a function?
eg
<a href="functions.php?function=add">
I want it so once the informaton has been put into the form and the submit button is pressed, that mabye it can go to a functions page and select the correct one.

[Richard H]

Here is a hint. Use a switch statement to determine which function should be called, and in parentheses call that function by means of matching the value you passed to the variable in the url.

eg switch($_GET['function']){

case "Add":
call add()
break;

case "Delete":
call delete()
break;
}

define the function somewhere else such as an included php file.

[Stuart]

OK Thanks. Havent tried yet but I will now. I will let you know how I get one


Thanks


Stuart

[Stuart]

If there is a problem I would suspect the calling of the function. When you call it you need to specify the parameters from your form in the brackets, otherwise your data from the form can't get into the function.

so where you call it with:
add();

replace it with

add($code,$name,$description,$sizes,$colours,$category,$price,$thumb,$picture);

Also, I have noticed potential security holes and possible probs when inserting a record.

Try and get the script to add a record by following my advice, and then I will help you to make the script more secure

I now know that you want to put the variables to be included in the function when its called AND then its setup.

Would making a lot of the functions into one file slow the loading for all users.
i.e Having the category select, product select and product display in one file or would it be better to have them in seperate files.


Stuart

[Stuart]

If a Session Variable has a value added to it when its in a function, would it be availible on another page if there was a header() after it?

[Richard H]

If a Session Variable has a value added to it when its in a function, would it be availible on another page if there was a header() after it?

Try it and find out...Best way to ensure it works is to pass the session id on every URL.

[Richard H]

Would making a lot of the functions into one file slow the loading for all users?

Probably not a lot. Depends how big the file size is.

[Stuart]

Umm, another problem. For some reason, when I say session_register(); it dont make a variable. I know this cos I echo it after and it says undefined variable.

[Richard H]

Did you start the session first with session_start(); ?

Are you registering them properly? e.g. session_register("name"); and NOT session_register("$name");

[Stuart]

Yep, have done that but it doesnt create the variable. Had a look at the php.ini and dint look out of place but here's the session section anyway-
///////////////////////////////////////////////////////////////////////////////////
[Session]
; Handler used to store/retrieve data.
session.save_handler = files

; Argument passed to save_handler. In the case of files, this is the path
; where data files are stored. Note: Windows users have to change this
; variable in order to use PHP's session functions.
; As of PHP 4.0.1, you can define the path as:
; session.save_path = "N;/path"
; where N is an integer. Instead of storing all the session files in
; /path, what this will do is use subdirectories N-levels deep, and
; store the session data in those directories. This is useful if you
; or your OS have problems with lots of files in one directory, and is
; a more efficient layout for servers that handle lots of sessions.
; NOTE 1: PHP will not create this directory structure automatically.
; You can use the script in the ext/session dir for that purpose.
; NOTE 2: See the section on garbage collection below if you choose to
; use subdirectories for session storage
session.save_path = C:\PHP\sessiondata ; argument passed to save_handler

; Whether to use cookies.
session.use_cookies = 1

; This option enables administrators to make their users invulnerable to
; attacks which involve passing session ids in URLs; defaults to 0.
; session.use_only_cookies = 1

; Name of the session (used as cookie name).
session.name = PHPSESSID

; Initialize session on request startup.
session.auto_start = 1

; Lifetime in seconds of cookie or, if 0, until browser is restarted.
session.cookie_lifetime = 0

; The path for which the cookie is valid.
session.cookie_path = /

; The domain for which the cookie is valid.
session.cookie_domain =

; Handler used to serialize data. php is the standard serializer of PHP.
session.serialize_handler = php

; Define the probability that the 'garbage collection' process is started
; on every session initialization.
; The probability is calculated by using gc_probability/gc_divisor,
; e.g. 1/100 means there is a 1% chance that the GC process starts
; on each request.

session.gc_probability = 1
session.gc_divisor = 100

; After this number of seconds, stored data will be seen as 'garbage' and
; cleaned up by the garbage collection process.
session.gc_maxlifetime = 1440

; NOTE: If you are using the subdirectory option for storing session files
; (see session.save_path above), then garbage collection does *not*
; happen automatically. You will need to do your own garbage
; collection through a shell script, cron entry, or some other method.
; For example, the following script would is the equivalent of
; setting session.gc_maxlifetime to 1440 (1440 seconds = 24 minutes):
; cd /path/to/sessions; find -cmin +24 | xargs rm

; PHP 4.2 and less have an undocumented feature/bug that allows you to
; to initialize a session variable in the global scope, albeit register_globals
; is disabled. PHP 4.3 and later will warn you, if this feature is used.
; You can disable the feature and the warning seperately. At this time,
; the warning is only displayed, if bug_compat_42 is enabled.

session.bug_compat_42 = 1
session.bug_compat_warn = 1

; Check HTTP Referer to invalidate externally stored URLs containing ids.
; HTTP_REFERER has to contain this substring for the session to be
; considered as valid.
session.referer_check =

; How many bytes to read from the file.
session.entropy_length = 0

; Specified here to create the session id.
session.entropy_file =

;session.entropy_length = 16

;session.entropy_file = /dev/urandom

; Set to {nocache,private,public,} to determine HTTP caching aspects
; or leave this empty to avoid sending anti-caching headers.
session.cache_limiter = nocache

; Document expires after n minutes.
session.cache_expire = 180

; trans sid support is disabled by default.
; Use of trans sid may risk your users security.
; Use this option with caution.
; - User may send URL contains active session ID
; to other person via. email/irc/etc.
; - URL that contains active session ID may be stored
; in publically accessible computer.
; - User may access your site with the same session ID
; always using URL stored in browser's history or bookmarks.
session.use_trans_sid = 1

; The URL rewriter will look for URLs in a defined set of HTML tags.
; form/fieldset are special; if you include them here, the rewriter will
; add a hidden <input> field with the info which is otherwise appended
; to URLs. If you want XHTML conformity, remove the form entry.
; Note that all valid entries require a "=", even if no value follows.
url_rewriter.tags = "a=href,area=href,frame=src,input=src,form=,fieldset="
///////////////////////////////////////////////////////////////////////////////////////
When I get the information on the hosting package I will try uploading it and seeing if that makes a diffrence.