Publish news feed through cron job

It is possible to publish news feed on user's wall through a cron job, if yes then how开发者_开发百科, what does facebook offer to do that?

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Via cron job is possible, but you will need the offline_access extended permission which gives longer lived session keys.

These can be used to update the user's profile even when they are not online.

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You should be able to do it if you have the oauth token for the user using the new graph api:

http://developers.facebook.com/docs/reference/api/status

See the 'publishing to facebook' section here: http://developers.facebook.com/docs/api which demonstrates how to use curl to do it.

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Via cron job - no. Cron is server side tool. You can do it with JavaScript's setTimeout() function.