[wp-trac] [WordPress Trac] #14912: Introduce register_upgrade_hook()

[WordPress Trac]

#14912: Introduce register_upgrade_hook()
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 Reporter:  scribu           |       Owner:                
     Type:  enhancement      |      Status:  new           
 Priority:  normal           |   Milestone:  Future Release
Component:  Upgrade/Install  |     Version:                
 Severity:  normal           |    Keywords:  needs-patch   
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 Currently, plugin authors overload the activation hook with routines for
 upgrading from older versions.

 We should have a dedicated hook for when plugins are upgraded.

 The activation hook should only be fired when the plugin is activated by
 the user.

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Ticket URL: <http://core.trac.wordpress.org/ticket/14912>
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