Andrew Nacin 3459ca246e Rewrite search_theme_directories() -- better performance and allow for caching. ...

* Update it to use PHP5 scandir().
 * Don't scan individual theme dirs -- we only need to check for style.css. (Solid performance gains.)
 * Improve and simplify branching.
 * Introduce wp_cache_themes_persistently filter to enable persistent caching of the return value, based on the theme_roots transient.

see #20103.


git-svn-id: https://develop.svn.wordpress.org/trunk@20020 602fd350-edb4-49c9-b593-d223f7449a82

2012-02-28 20:05:00 +00:00

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