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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 |
|---|---|
| 1667 | break; |
| 1668 | case 'server': |
| 1669 | $lastpostdate = $wpdb->get_var("SELECT DATE_ADD(post_date_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1"); |
| 1670 | break; |
| 1671 | } |
| 1672 | $cache_lastpostdate[$blog_id][$timezone] = $lastpostdate; |
| 1673 | } else { |
| 1674 | $lastpostdate = $cache_lastpostdate[$blog_id][$timezone]; |
| 1675 | } |
| 1676 | return apply_filters( 'get_lastpostdate', $lastpostdate ); |
| 1677 | } |
| 1678 | |
| 1679 | function get_lastpostmodified($timezone = 'server') { |
| 1680 | global $cache_lastpostmodified, $pagenow, $wpdb, $blog_id; |
| 1681 | $add_seconds_blog = get_option('gmt_offset') * 3600; |
| 1682 | $add_seconds_server = date('Z'); |
| 1683 | if ( !isset($cache_lastpostmodified[$blog_id][$timezone]) ) { |
| 1684 | switch(strtolower($timezone)) { |
| 1685 | case 'gmt': |