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Transients: Clear expired transients from the database in a daily cron task.

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Fixes #41699


git-svn-id: https://develop.svn.wordpress.org/trunk@41963 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Dion Hulse
2017-10-21 13:21:24 +00:00
parent 5233a95355
commit 899fb2f7f6
4 changed files with 66 additions and 40 deletions
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23
src/wp-admin/includes/schema.php
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@@ -584,27 +584,8 @@ function populate_options() {
// Delete obsolete magpie stuff.
$wpdb->query("DELETE FROM $wpdb->options WHERE option_name REGEXP '^rss_[0-9a-f]{32}(_ts)?$'");
/*
* Deletes all expired transients. The multi-table delete syntax is used
* to delete the transient record from table a, and the corresponding
* transient_timeout record from table b.
*/
$time = time();
$sql = "DELETE a, b FROM $wpdb->options a, $wpdb->options b
WHERE a.option_name LIKE %s
AND a.option_name NOT LIKE %s
AND b.option_name = CONCAT( '_transient_timeout_', SUBSTRING( a.option_name, 12 ) )
AND b.option_value < %d";
$wpdb->query( $wpdb->prepare( $sql, $wpdb->esc_like( '_transient_' ) . '%', $wpdb->esc_like( '_transient_timeout_' ) . '%', $time ) );
if ( is_main_site() && is_main_network() ) {
$sql = "DELETE a, b FROM $wpdb->options a, $wpdb->options b
WHERE a.option_name LIKE %s
AND a.option_name NOT LIKE %s
AND b.option_name = CONCAT( '_site_transient_timeout_', SUBSTRING( a.option_name, 17 ) )
AND b.option_value < %d";
$wpdb->query( $wpdb->prepare( $sql, $wpdb->esc_like( '_site_transient_' ) . '%', $wpdb->esc_like( '_site_transient_timeout_' ) . '%', $time ) );
}
// Clear expired transients
delete_expired_transients( true );
}
/**