[wp-trac] [WordPress Trac] #15042: plugin.php functions (filters) should be available to all pluggable components (wpdb, object cache)

[WordPress Trac]

#15042: plugin.php functions (filters) should be available to all pluggable
components (wpdb, object cache)
--------------------------+-------------------------------------------------
 Reporter:  andy          |       Owner:                 
     Type:  defect (bug)  |      Status:  new            
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Plugins       |     Version:                 
 Severity:  normal        |    Keywords:  filter, plugin 
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 Problem: DB plugins (e.g. HyperDB) can't use add_filter or apply_filters
 in their configurations because these functions are unavailable at include
 time.

 Discussion: The filter and action functions in plugin.php should be
 available to all pluggable components. This includes WPDB and
 WP_Object_Cache which should rely on these core programming patterns
 rather than reimplementing them. As these functions deal only with global
 variables, it is safe to include them earlier. Functions related to
 plugin_basename are not useful to WPDB or WP_Object_Cache but there is no
 danger in moving them as well.

 Solution: Require plugin.php before require_wp_db().

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Ticket URL: <http://core.trac.wordpress.org/ticket/15042>
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