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Cache get_lastpostmodified() results. see #12575 

git-svn-id: https://develop.svn.wordpress.org/trunk@13653 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Ryan Boren 2010-03-10 21:32:03 +00:00
parent 1ca609f8d3
commit 74ece7e880
1 changed files with 34 additions and 23 deletions
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57
wp-includes/post.php
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@ -3718,7 +3718,7 @@ function get_posts_by_author_sql($post_type, $full = TRUE, $post_author = NULL)
}
/**
* Retrieve the date the the last post was published.
* Retrieve the date that the last post was published.
*
* The server timezone is the default and is the difference between GMT and
* server time. The 'blog' value is the date when the last post was posted. The
@ -3770,34 +3770,38 @@ function get_lastpostdate($timezone = 'server') {
* @uses $blog_id
* @uses apply_filters() Calls 'get_lastpostmodified' filter
*
* @global mixed $cache_lastpostmodified Stores the date the last post was modified
*
* @param string $timezone The location to get the time. Can be 'gmt', 'blog', or 'server'.
* @return string The date the post was last modified.
*/
function get_lastpostmodified($timezone = 'server') {
global $cache_lastpostmodified, $wpdb, $blog_id;
global $wpdb;
$add_seconds_server = date('Z');
if ( !isset($cache_lastpostmodified[$blog_id][$timezone]) ) {
switch(strtolower($timezone)) {
case 'gmt':
$lastpostmodified = $wpdb->get_var("SELECT post_modified_gmt FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_modified_gmt DESC LIMIT 1");
break;
case 'blog':
$lastpostmodified = $wpdb->get_var("SELECT post_modified FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_modified_gmt DESC LIMIT 1");
break;
case 'server':
$lastpostmodified = $wpdb->get_var("SELECT DATE_ADD(post_modified_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_modified_gmt DESC LIMIT 1");
break;
}
$lastpostdate = get_lastpostdate($timezone);
if ( $lastpostdate > $lastpostmodified ) {
$lastpostmodified = $lastpostdate;
}
$cache_lastpostmodified[$blog_id][$timezone] = $lastpostmodified;
} else {
$lastpostmodified = $cache_lastpostmodified[$blog_id][$timezone];
$timezone = strtolower( $timezone );
$lastpostmodified = wp_cache_get( "lastpostmodified:$timezone", 'timeinfo' );
if ( $lastpostmodified )
return apply_filters( 'get_lastpostmodified', $lastpostmodified, $timezone );
switch ( strtolower($timezone) ) {
case 'gmt':
$lastpostmodified = $wpdb->get_var("SELECT post_modified_gmt FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_modified_gmt DESC LIMIT 1");
break;
case 'blog':
$lastpostmodified = $wpdb->get_var("SELECT post_modified FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_modified_gmt DESC LIMIT 1");
break;
case 'server':
$lastpostmodified = $wpdb->get_var("SELECT DATE_ADD(post_modified_gmt, INTERVAL '$add_seconds_server' SECOND) FROM $wpdb->posts WHERE post_status = 'publish' AND post_type = 'post' ORDER BY post_modified_gmt DESC LIMIT 1");
break;
}
$lastpostdate = get_lastpostdate($timezone);
if ( $lastpostdate > $lastpostmodified )
$lastpostmodified = $lastpostdate;
if ( $lastpostmodified )
wp_cache_set( "lastpostmodified:$timezone", $lastpostmodified, 'timeinfo' );
return apply_filters( 'get_lastpostmodified', $lastpostmodified, $timezone );
}
@ -4016,6 +4020,13 @@ function _transition_post_status($new_status, $old_status, $post) {
do_action('private_to_published', $post->ID); // Deprecated, use private_to_publish
}
// If published posts changed clear the lastpostmodified cache
if ( 'publish' == $new_status || 'publish' == $old_status) {
wp_cache_delete( 'lastpostmodified:server', 'timeinfo' );
wp_cache_delete( 'lastpostmodified:gmt', 'timeinfo' );
wp_cache_delete( 'lastpostmodified:blog', 'timeinfo' );
}
// Always clears the hook in case the post status bounced from future to draft.
wp_clear_scheduled_hook('publish_future_post', array( $post->ID ) );
}