[wp-trac] [WordPress Trac] #16287: get_option() - store retrieved option in a global array?

[WordPress Trac]

#16287: get_option() - store retrieved option in a global array?
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 Reporter:  digitalnature         |       Owner:
     Type:  enhancement           |      Status:  closed
 Priority:  normal                |   Milestone:
Component:  Database              |     Version:  3.1
 Severity:  normal                |  Resolution:  invalid
 Keywords:  get_option, database  |
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Comment (by garyc40):

 Just in case you're still confused about the difference between in-memory
 and persistent cache in WordPress:

 Remember that the default object cache is not persistent, which means when
 you start another request (by commenting via AJAX, or reloading the
 dashboard), the cache is emptied and repopulated. Think of it as a
 variable in a PHP file.

 {{{
 var_dump( $a ); // outputs null all the time, no matter how many times you
 reload the page
 $a = 1; // this value is only valid for this request, when you reload the
 page, it's gone
 }}}

 Persistent cache on the other hand, preserve the cache across page
 requests. Think of it like, saving {{{$a}}} to a file, and loading it back
 in the subsequent requests:

 {{{
 if ( ! $a = read_from_file() )
         $a = 0;

 $a = ++;

 save_to_file( $a );
 }}}

 Got the difference? WP_Object_Cache aims to be an in-memory cache, which
 means its purpose is to save unnecessary db queries within each single
 request. In that sense, it's working perfectly.

 If you want the persistent behavior, install one of those plugins that you
 mentioned.

 Hope this makes sense.

 Damn, I have too much time on my hand :)

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Ticket URL: <http://core.trac.wordpress.org/ticket/16287#comment:9>
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