Re: [PHP] how to determine if shopping cart has been abandoned?
Why not just maintain carts for users with accounts and maintain them indefinately. Users with out accounts can have there carts stored in a session and will become invalid when the session expires. --- Chris W. Parker [EMAIL PROTECTED] wrote: Hey there everyone. I haven't had time much to work on my cart program recently but I was just thinking about abandoned carts and can't figure something out completely. How do you determine if a shopping cart has been abandoned or not? What I am thinking is that when the customer adds an item to their cart an entry is made in a db table. That means a cart is created, and that's about as far as I get. ;P Actually that's not totally true, so let me continue. The only reason I can think of to determine if a cart has been abandoned or not would be based on how old the shopping cart is. That is, when it was last modified (had a product added/modified/deleted from it). But who's the say that the customer that created that cart is not going to come back to the site at some point and then checkout? So then we have to decide how long an unmodified cart is considered abandoned as opposed to active. Let's make that time 1 day (24-hours). Now let's imagine that there are four abandoned carts in the database. Now what do we do? Does the program automatically delete the carts after a certain (definable) period of time, i.e. 7 days? OR do we allow the merchant to manually delete the carts at any point they want? And how do you determine your abandoned cart rate? That is, do I take a survey of the db evey week to see how many abandoned carts I have and then average those results? The problem I see is that a cart could be considered abandoned for 4 days but then become active again because the customer has come back to it and has added more products to it. In this case I'd say it was never abandoned in the first place and in which case it would be innacurate to include it your abandoned cart total. WHAT TO DO? A BIT CONFUSED I AM! Thanks, Chris. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php __ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] how to determine if shopping cart has been abandoned?
Daniel Guerrier mailto:[EMAIL PROTECTED] on Thursday, December 11, 2003 9:08 AM said: Why not just maintain carts for users with accounts and maintain them indefinately. Users with out accounts can have there carts stored in a session and will become invalid when the session expires. Not a bad idea, in fact I think I like it (as it's been suggested before). I will probably use it for the rewrite. Chris. -- Don't like reformatting your Outlook replies? Now there's relief! http://home.in.tum.de/~jain/software/outlook-quotefix/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] how to determine if shopping cart has been abandoned?
[snip] Of course, now you have to deal with putting inventory back on the shelf when the session expiresand you have no way of knowing when that would happen unless you're storing *something*. A good point, if that's the way he wants to do things... In which case, SC needs to be stored SOMEWHERE (DB), and a cron job garbage cleanout could take place every 1/15/30/60 minutes to remove SC's without matching sessions, or something similar. [/snip] How about a session identified limbo table? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to determine if shopping cart has been abandoned?
Chris, et al -- ...and then Chris W. Parker said... % % Hey there everyone. Hiya! % ... % How do you determine if a shopping cart has been abandoned or not? ... % % The problem I see is that a cart could be considered abandoned for 4 % days but then become active again because the customer has come back to % it and has added more products to it. In this case I'd say it was never % abandoned in the first place and in which case it would be innacurate to % include it your abandoned cart total. If you go with the ideas of keeping the cart in a session (and not decrementing the stock until purchase time) then it's easy; when the session goes away the cart does and it's abandoned. Have a simple table of all carts created or even a counter of carts and reference that against completed carts to get your ratio. If you go with the ideas of storing the cart in the DB, then either implement the simple table above for your count as carts get deleted or just add an 'abandoned' field and keep the cart forever or perhaps combine the two and note old carts that are due to be wiped as such and include that analysis in the math against the cart_total_count table. HTH HAND :-D -- David T-G * There is too much animal courage in (play) [EMAIL PROTECTED] * society and not sufficient moral courage. (work) [EMAIL PROTECTED] -- Mary Baker Eddy, Science and Health http://justpickone.org/davidtg/ Shpx gur Pbzzhavpngvbaf Qrprapl Npg! pgp0.pgp Description: PGP signature
Re: [PHP] how to determine if shopping cart has been abandoned?
Chris, et al -- ...and then Chris W. Parker said... % ... % % Would it be too complicated to say 5 in inventory, 2 of those are in % customer shopping carts? Or something along those lines? I shouldn't think so; it would be a bit of extra work, but not a big deal. If you did, then I'd have a notice somewhere that an item in an old cart might get sold out from under the buyer (especially if there's any real or implied guarantee of availability). I would imagine that Amazon, from another example, has at least this level or perhaps even doesn't note the stock as gone. Surely it would kill them if I ordered 432 copies of my buddy's book, waited until they said that they had stock again, and then repeated the process. % % Chris. % % p.s. Does anyone know of any mailing lists that deal with e-commerce and % shopping cart design (code/implementation/logic/etc.)??? I don't, but if you find one I'd be interested. HTH HAND :-D -- David T-G * There is too much animal courage in (play) [EMAIL PROTECTED] * society and not sufficient moral courage. (work) [EMAIL PROTECTED] -- Mary Baker Eddy, Science and Health http://justpickone.org/davidtg/ Shpx gur Pbzzhavpngvbaf Qrprapl Npg! pgp0.pgp Description: PGP signature
[PHP] how to determine if shopping cart has been abandoned?
Hey there everyone. I haven't had time much to work on my cart program recently but I was just thinking about abandoned carts and can't figure something out completely. How do you determine if a shopping cart has been abandoned or not? What I am thinking is that when the customer adds an item to their cart an entry is made in a db table. That means a cart is created, and that's about as far as I get. ;P Actually that's not totally true, so let me continue. The only reason I can think of to determine if a cart has been abandoned or not would be based on how old the shopping cart is. That is, when it was last modified (had a product added/modified/deleted from it). But who's the say that the customer that created that cart is not going to come back to the site at some point and then checkout? So then we have to decide how long an unmodified cart is considered abandoned as opposed to active. Let's make that time 1 day (24-hours). Now let's imagine that there are four abandoned carts in the database. Now what do we do? Does the program automatically delete the carts after a certain (definable) period of time, i.e. 7 days? OR do we allow the merchant to manually delete the carts at any point they want? And how do you determine your abandoned cart rate? That is, do I take a survey of the db evey week to see how many abandoned carts I have and then average those results? The problem I see is that a cart could be considered abandoned for 4 days but then become active again because the customer has come back to it and has added more products to it. In this case I'd say it was never abandoned in the first place and in which case it would be innacurate to include it your abandoned cart total. WHAT TO DO? A BIT CONFUSED I AM! Thanks, Chris. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to determine if shopping cart has been abandoned?
This looks like a business decision. Your business anaylist could help answer your question. Chris W. Parker wrote: Hey there everyone. I haven't had time much to work on my cart program recently but I was just thinking about abandoned carts and can't figure something out completely. How do you determine if a shopping cart has been abandoned or not? What I am thinking is that when the customer adds an item to their cart an entry is made in a db table. That means a cart is created, and that's about as far as I get. ;P Actually that's not totally true, so let me continue. The only reason I can think of to determine if a cart has been abandoned or not would be based on how old the shopping cart is. That is, when it was last modified (had a product added/modified/deleted from it). But who's the say that the customer that created that cart is not going to come back to the site at some point and then checkout? So then we have to decide how long an unmodified cart is considered abandoned as opposed to active. Let's make that time 1 day (24-hours). Now let's imagine that there are four abandoned carts in the database. Now what do we do? Does the program automatically delete the carts after a certain (definable) period of time, i.e. 7 days? OR do we allow the merchant to manually delete the carts at any point they want? And how do you determine your abandoned cart rate? That is, do I take a survey of the db evey week to see how many abandoned carts I have and then average those results? The problem I see is that a cart could be considered abandoned for 4 days but then become active again because the customer has come back to it and has added more products to it. In this case I'd say it was never abandoned in the first place and in which case it would be innacurate to include it your abandoned cart total. WHAT TO DO? A BIT CONFUSED I AM! Thanks, Chris. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to determine if shopping cart has been abandoned?
Hello Chris, Thursday, December 4, 2003, 9:09:57 PM, you wrote: CWP The problem I see is that a cart could be considered abandoned for 4 CWP days but then become active again because the customer has come back to CWP it and has added more products to it. In this case I'd say it was never CWP abandoned in the first place and in which case it would be innacurate to CWP include it your abandoned cart total. Not that it answers all of your questions - but Amazon persist your shopping basket for AGES. Infact I do wonder if it ever times out, I've known them last a few months before. Mind you - that's because they knew who I was. You ought to group your baskets into anonymous and owned. Keep the owned ones for weeks, if not months, and the anonymous ones shorter. 1 week at the most? -- Best regards, Richardmailto:[EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to determine if shopping cart has been abandoned?
Chris W. Parker wrote: Now what do we do? Does the program automatically delete the carts after a certain (definable) period of time, i.e. 7 days? OR do we allow the merchant to manually delete the carts at any point they want? And how do you determine your abandoned cart rate? That is, do Well, you don't what item to linger too long as prices change. If a user add something to their cart and comes back days later, there may be a different price or the item may have been discontinued, etc.. So you user may end up getting the wrong price unless you have checkout logic to correct pricing. I say, if an incomplete cart hasn't been touched more than 2 hours *and* you do cleanup processing at 3:00am, then that'll be safe enough, especially if you have few international orders. -Eric Wood -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] how to determine if shopping cart has been abandoned?
[snip] ...ton's o thoughts [/snip] I am making an assumption that you are using sessions for your shoppers. If this is the case then the cart would be abandoned if/when the session expires. If you are not using sessions then I think 24 hours would be on the longish side of acceptable. In another thread on another list I pointed out to another person designing a cart that the items in the cart are removed from inventory while they are in the cart even though no check-out has occured. If the cart is abandoned I want to return those items to the shelf as quickly as possible, making them available for other shoppers. A lot of folks get this wrong IMHO...they do not remove the item from inventory when it is placed in the cart, they do it at check-out. This could cause concerns if the items in question are popular. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to determine if shopping cart has been abandoned?
On Thu, 2003-12-04 at 16:22, Eric Wood wrote: Chris W. Parker wrote: Now what do we do? Does the program automatically delete the carts after a certain (definable) period of time, i.e. 7 days? OR do we allow the merchant to manually delete the carts at any point they want? And how do you determine your abandoned cart rate? That is, do Well, you don't what item to linger too long as prices change. If a user add something to their cart and comes back days later, there may be a different price or the item may have been discontinued, etc.. So you user may end up getting the wrong price unless you have checkout logic to correct pricing. I say, if an incomplete cart hasn't been touched more than 2 hours *and* you do cleanup processing at 3:00am, then that'll be safe enough, especially if you have few international orders. -Eric Wood Since the shopping cart hasn't been checked out, couldn't the shopping cart just keep track of inventory IDs and quantity, and finalize price at checkout time. Thus the prices would be up-to-date even if the user returned 5 months later. This could also handle products no longer carried, since hte ID would become invalid and it could automatically be removed form the shopping cart when the user reconnects. Chances are after 5 months they don't remember what they ordered anyways. Cheers, Rob. -- .. | InterJinn Application Framework - http://www.interjinn.com | :: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to determine if shopping cart has been abandoned?
On Friday, December 5, 2003, at 08:09 AM, Chris W. Parker wrote: I haven't had time much to work on my cart program recently but I was just thinking about abandoned carts and can't figure something out completely. How do you determine if a shopping cart has been abandoned or not? What I am thinking is that when the customer adds an item to their cart an entry is made in a db table. That means a cart is created, and that's about as far as I get. ;P Well, I'd have SESSION based shopping carts, rather than DB based carts (even though the session may be DB powered). To my way of thinking, if a user abandons their session, then they abandon their shopping cart -- just like if I leave my shopping cart in isle three and walk out of the supermarket. However, for logged in, registered members, I'd have options to: - autosave a shopping cart (i'd store it indefinitely -- until the user is deleted, or perhaps a year) - save a SC for later Actually that's not totally true, so let me continue. The only reason I can think of to determine if a cart has been abandoned or not would be based on how old the shopping cart is. That is, when it was last modified (had a product added/modified/deleted from it). But who's the say that the customer that created that cart is not going to come back to the site at some point and then checkout? So then we have to decide how long an unmodified cart is considered abandoned as opposed to active. Let's make that time 1 day (24-hours). If you owned a grocery store, you'd have to decide how long you'd leave an abandoned cart in isle 3 -- 5 minutes? a week? This is entirely a decision up to you and your client. If you have 1000's of orders every hour, obviously storing every abandoned cart for a year is not an option. Why couldn't it just be a configurable option in the app? Now let's imagine that there are four abandoned carts in the database. Now what do we do? Does the program automatically delete the carts after a certain (definable) period of time, i.e. 7 days? OR do we allow the merchant to manually delete the carts at any point they want? And how do you determine your abandoned cart rate? That is, do I take a survey of the db evey week to see how many abandoned carts I have and then average those results? Run a cron job once a day (or once an hour if the site has enough traffic to warrant it) clearing out abandoned order (that you determined about would be delete-able after a hour/day/week/year). The cron job should take note of how many were deleted, so that you can establish statistics. The problem I see is that a cart could be considered abandoned for 4 days but then become active again because the customer has come back to it and has added more products to it. In this case I'd say it was never abandoned in the first place and in which case it would be innacurate to include it your abandoned cart total. I personally would trash the cart with the session (sessions are cleaned up by PHP automatically), but let the logged in user auto-save or manually-save the cart for a later date. Next time they log-in, the cart gets loaded from the DB, prices and availability get updated, and the user can continue. Justin French -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] how to determine if shopping cart has been abandoned?
Anas Mughal mailto:[EMAIL PROTECTED] on Thursday, December 04, 2003 1:23 PM said: This looks like a business decision. Your business anaylist could help answer your question. Yes, and so far they've all given good ideas. Thanks. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to determine if shopping cart has been abandoned?
Of course, this makes problems when you're adding promotional product to the cart, which should have a seperate price. Add to this that the customer may have special pricing (think Business to Business). So you have to have an update mechanism for promotions and the extra price lists. Do-able, but it can get hairy. Robert Cummings wrote: On Thu, 2003-12-04 at 16:22, Eric Wood wrote: Chris W. Parker wrote: Now what do we do? Does the program automatically delete the carts after a certain (definable) period of time, i.e. 7 days? OR do we allow the merchant to manually delete the carts at any point they want? And how do you determine your abandoned cart rate? That is, do Well, you don't what item to linger too long as prices change. If a user add something to their cart and comes back days later, there may be a different price or the item may have been discontinued, etc.. So you user may end up getting the wrong price unless you have checkout logic to correct pricing. I say, if an incomplete cart hasn't been touched more than 2 hours *and* you do cleanup processing at 3:00am, then that'll be safe enough, especially if you have few international orders. -Eric Wood Since the shopping cart hasn't been checked out, couldn't the shopping cart just keep track of inventory IDs and quantity, and finalize price at checkout time. Thus the prices would be up-to-date even if the user returned 5 months later. This could also handle products no longer carried, since hte ID would become invalid and it could automatically be removed form the shopping cart when the user reconnects. Chances are after 5 months they don't remember what they ordered anyways. Cheers, Rob. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] how to determine if shopping cart has been abandoned?
Jay Blanchard mailto:[EMAIL PROTECTED] on Thursday, December 04, 2003 1:25 PM said: In another thread on another list I pointed out to another person designing a cart that the items in the cart are removed from inventory while they are in the cart even though no check-out has occured. If the cart is abandoned I want to return those items to the shelf as quickly as possible, making them available for other shoppers. A lot of folks get this wrong IMHO...they do not remove the item from inventory when it is placed in the cart, they do it at check-out. This could cause concerns if the items in question are popular. I brought up this same issue recently with some coworkers and everyone (except me) thought it would be a good idea to do it at checkout. I took your approach which is to remove it when the customer takes it off the shelf so to speak. Would it be too complicated to say 5 in inventory, 2 of those are in customer shopping carts? Or something along those lines? Chris. p.s. Does anyone know of any mailing lists that deal with e-commerce and shopping cart design (code/implementation/logic/etc.)??? -- Don't like reformatting your Outlook replies? Now there's relief! http://home.in.tum.de/~jain/software/outlook-quotefix/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] how to determine if shopping cart has been abandoned?
Justin French mailto:[EMAIL PROTECTED] on Thursday, December 04, 2003 2:20 PM said: If you owned a grocery store, you'd have to decide how long you'd leave an abandoned cart in isle 3 -- 5 minutes? a week? This is entirely a decision up to you and your client. slaps_forehead/ ;) If you have 1000's of orders every hour, obviously storing every abandoned cart for a year is not an option. Why couldn't it just be a configurable option in the app? That is an excellent idea and one that I hadn't thought of. I personally would trash the cart with the session (sessions are cleaned up by PHP automatically), but let the logged in user auto-save or manually-save the cart for a later date. Yeah the session files are cleaned up automatically but your application doesn't know that. You'd have to specifically tell your application (via a cron job??) when the session get cleaned up and that it (the application) should remove all the old carts. Is there something I don't know about (very possible!)? I mean, even if the users session file is deleted, how do you tell the app. to follow suit and delete it's ASIDE from setting a cron job? Chris. -- Don't like reformatting your Outlook replies? Now there's relief! http://home.in.tum.de/~jain/software/outlook-quotefix/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] how to determine if shopping cart has been abandoned?
On Thu, 2003-12-04 at 16:24, Jay Blanchard wrote: [snip] ...ton's o thoughts [/snip] I am making an assumption that you are using sessions for your shoppers. If this is the case then the cart would be abandoned if/when the session expires. If you are not using sessions then I think 24 hours would be on the longish side of acceptable. In another thread on another list I pointed out to another person designing a cart that the items in the cart are removed from inventory while they are in the cart even though no check-out has occured. If the cart is abandoned I want to return those items to the shelf as quickly as possible, making them available for other shoppers. A lot of folks get this wrong IMHO...they do not remove the item from inventory when it is placed in the cart, they do it at check-out. This could cause concerns if the items in question are popular. I wouold just leave the items on the shelf until the cart has been checked out. If the item becomes unavailable the checkout code can inform the user. This way you maximize the chance your product gets sold. This is also the way the online grocer I use works, except they allow you to authorize them to do an automatic substitution with something almost equivalent... so maybe 2 litres of milk instead of 4. Cheers, Rob. -- .. | InterJinn Application Framework - http://www.interjinn.com | :: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to determine if shopping cart has been abandoned?
On Friday, December 5, 2003, at 09:35 AM, Chris W. Parker wrote: Yeah the session files are cleaned up automatically but your application doesn't know that. You'd have to specifically tell your application (via a cron job??) when the session get cleaned up and that it (the application) should remove all the old carts. Is there something I don't know about (very possible!)? I mean, even if the users session file is deleted, how do you tell the app. to follow suit and delete it's ASIDE from setting a cron job? Rather than storing the shopping cart in a DB, store the cart in the session. When the session dies, so does the cart. When/if they choose to save it, it THEN gets ported into a database. Justin French -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] how to determine if shopping cart has been abandoned?
Justin French mailto:[EMAIL PROTECTED] on Thursday, December 04, 2003 2:48 PM said: Rather than storing the shopping cart in a DB, store the cart in the session. When the session dies, so does the cart. When/if they choose to save it, it THEN gets ported into a database. Aaah...! This makes sense. Thanks, Chris. -- Don't like reformatting your Outlook replies? Now there's relief! http://home.in.tum.de/~jain/software/outlook-quotefix/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to determine if shopping cart has been abandoned?
Of course, now you have to deal with putting inventory back on the shelf when the session expiresand you have no way of knowing when that would happen unless you're storing *something*. Chris W. Parker wrote: Justin French mailto:[EMAIL PROTECTED] on Thursday, December 04, 2003 2:48 PM said: Rather than storing the shopping cart in a DB, store the cart in the session. When the session dies, so does the cart. When/if they choose to save it, it THEN gets ported into a database. Aaah...! This makes sense. Thanks, Chris. -- Don't like reformatting your Outlook replies? Now there's relief! http://home.in.tum.de/~jain/software/outlook-quotefix/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to determine if shopping cart has been abandoned?
why not only reduce the stock once a sale has gone through ??? Cheers, Jon jon bennett | [EMAIL PROTECTED] new media designer / developer _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ J b e n . n e t 91 Gloucester Rd, Trowbridge, Wilts, BA14 0AD t: +44 (0) 1225 341039 w: http://www.jben.net/ On 5 Dec 2003, at 01:09, Justin Patrin wrote: Of course, now you have to deal with putting inventory back on the shelf when the session expiresand you have no way of knowing when that would happen unless you're storing *something*. Chris W. Parker wrote: Justin French mailto:[EMAIL PROTECTED] on Thursday, December 04, 2003 2:48 PM said: Rather than storing the shopping cart in a DB, store the cart in the session. When the session dies, so does the cart. When/if they choose to save it, it THEN gets ported into a database. Aaah...! This makes sense. Thanks, Chris. -- Don't like reformatting your Outlook replies? Now there's relief! http://home.in.tum.de/~jain/software/outlook-quotefix/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] how to determine if shopping cart has been abandoned?
On Friday, December 5, 2003, at 12:09 PM, Justin Patrin wrote: Of course, now you have to deal with putting inventory back on the shelf when the session expiresand you have no way of knowing when that would happen unless you're storing *something*. A good point, if that's the way he wants to do things... In which case, SC needs to be stored SOMEWHERE (DB), and a cron job garbage cleanout could take place every 1/15/30/60 minutes to remove SC's without matching sessions, or something similar. Justin -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
