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Posted by NC on 12/22/05 18:55
Realtime wrote:
>
> How do I go about writing a php application that will alert people in a database
> from different RSS news feeds from different sites. So lets say we have
> a database and user A has a list of news alerts he wants to be alerted on.
> So the application will go to a search engine that will bring up the results
> in XML. The results are then stored in the database. I just need the logic
> process. Because I am worried of the latency on the server. So how can
> i process multiple alerts per user? Or even process multiple users at once.
If you can schedule your script to run every hour or every day using
your operating system's scheduling facility, here's what you can do in
the script itself:
Query the database and obtain a list of all RSS feeds to which users
are sunscribed
For each RSS on the list {
Retrieve the feed
Parse the feed
For each item identified {
Check if it's in the database
If not, write it into the database and send an alert
to all users who subscribe to the feed
}
}
You might want to run this script using the command-line interpreter;
this will save system resources and help you get around the execution
time limit...
Cheers,
NC
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