Selecting an advert to display (PHP)

Question

I'm doing an advertising feature on a website: The more you pay, the likelier the advert is to show.

How would I go about programming this in PHP?

I've not started at all yet because I have no idea of the implementation I could do, especially choosing the advert to display. Given that a person could bid as much money as they want, how would I make it biased towards the higher payers,

So for example, Troy payed 500 and Jane payed 1500, if they are the only two advertising right now, there's a 3/4 chance of Jane's advert showing, and a 1/4 chance of Troy's advert showing.

Given that $adverts is a mysql_query of all the running adverts with the columns: AdvertID | MoneyPayed How would I choose the ID to show?

you want a weighted random like this: http://stackoverflow.com/questions/4623036/random-weighted-selection-of-an-event — , Dec 18 '11 at 19:38
@Indranil I don't understand how I woud implement a formula to choose one to show. — Ashley Davies, Dec 18 '11 at 19:39
@Dagon I'll take a look at the answer for that question. Thanks! — Ashley Davies, Dec 18 '11 at 19:40

score 1 · Accepted Answer · edited May 23 '17 at 10:08

1

Thanks to Dagon for linking me to this, it solved my problem:

Random weighted selection of an event

Notably the link which was there which explained the answer:

http://pastebin.com/qTTEWK8u

edited May 23 '17 at 10:08

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answered Dec 18 '11 at 19:49

Ashley Davies

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Selecting an advert to display (PHP)

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