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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 2884 | } |
| 2885 | $lastpostdate = get_lastpostdate($timezone); |
| 2886 | if ( $lastpostdate > $lastpostmodified ) { |
| 2887 | $lastpostmodified = $lastpostdate; |
| 2888 | } |
| 2889 | $cache_lastpostmodified[$blog_id][$timezone] = $lastpostmodified; |
| 2890 | } else { |
| 2891 | $lastpostmodified = $cache_lastpostmodified[$blog_id][$timezone]; |
| 2892 | } |
| 2893 | return apply_filters( 'get_lastpostmodified', $lastpostmodified, $timezone ); |
| 2894 | } |
| 2895 | |
| 2896 | /** |
| 2897 | * Updates posts in cache. |
| 2898 | * |
| 2899 | * @usedby update_page_cache() Aliased by this function. |
| 2900 | * |
| 2901 | * @package WordPress |
| 2902 | * @subpackage Cache |