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Allow deleting expired transients by prefix #10830

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Allow deleting expired transients by prefix #10830

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589a402
Allow scoped deletion of expired transients by prefix
solankisoftware89 Jan 30, 2026
a674bce
Restore @global wpdb documentation for delete_expired_transients()
solankisoftware89 Jan 30, 2026
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81 changes: 56 additions & 25 deletions src/wp-includes/option.php
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Original file line number Diff line number Diff line change
Expand Up @@ -1633,53 +1633,84 @@ function set_transient( $transient, $value, $expiration = 0 ) {
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param bool $force_db Optional. Force cleanup to run against the database even when an external object cache is used.
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@shail-mehta shail-mehta Jan 30, 2026

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I believe global documentation should not be removed.

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@solankisoftware89 solankisoftware89 Jan 30, 2026

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Thanks for the note — I’ve restored the @global wpdb documentation and pushed an update.

* @param bool $force_db Optional. Force cleanup to run against the database even when an
* external object cache is used. Default false.
* @param string|bool $prefix Optional. Transient name prefix. When provided, only expired transients
* matching this prefix will be deleted. This parameter is only applied
* when not using an external object cache or when `$force_db` is true.
* Default false.
*/
function delete_expired_transients( $force_db = false ) {
function delete_expired_transients( $force_db = false, $prefix = false ) {
global $wpdb;

// Skip DB cleanup when using external object cache unless forced.
if ( ! $force_db && wp_using_ext_object_cache() ) {
return;
}

$transient_like = $wpdb->esc_like(
'_transient_' . ( $prefix ? $prefix : '' )
) . '%';

$timeout_like = $wpdb->esc_like( '_transient_timeout_' ) . '%';

$wpdb->query(
$wpdb->prepare(
"DELETE a, b FROM {$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->esc_like( '_transient_' ) . '%',
$wpdb->esc_like( '_transient_timeout_' ) . '%',
"DELETE a, b
FROM {$wpdb->options} a
JOIN {$wpdb->options} b
ON b.option_name = CONCAT( '_transient_timeout_', SUBSTRING( a.option_name, 12 ) )
WHERE a.option_name LIKE %s
AND a.option_name NOT LIKE %s
AND b.option_value < %d",
$transient_like,
$timeout_like,
time()
)
);

if ( ! is_multisite() ) {
// Single site stores site transients in the options table.
// Single-site: site transients stored in options table.
$site_transient_like = $wpdb->esc_like(
'_site_transient_' . ( $prefix ? $prefix : '' )
) . '%';

$site_timeout_like = $wpdb->esc_like( '_site_transient_timeout_' ) . '%';

$wpdb->query(
$wpdb->prepare(
"DELETE a, b FROM {$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->esc_like( '_site_transient_' ) . '%',
$wpdb->esc_like( '_site_transient_timeout_' ) . '%',
"DELETE a, b
FROM {$wpdb->options} a
JOIN {$wpdb->options} b
ON b.option_name = CONCAT( '_site_transient_timeout_', SUBSTRING( a.option_name, 17 ) )
WHERE a.option_name LIKE %s
AND a.option_name NOT LIKE %s
AND b.option_value < %d",
$site_transient_like,
$site_timeout_like,
time()
)
);

} elseif ( is_main_site() && is_main_network() ) {
// Multisite stores site transients in the sitemeta table.
// Multisite: site transients stored in sitemeta.
$site_transient_like = $wpdb->esc_like(
'_site_transient_' . ( $prefix ? $prefix : '' )
) . '%';

$site_timeout_like = $wpdb->esc_like( '_site_transient_timeout_' ) . '%';

$wpdb->query(
$wpdb->prepare(
"DELETE a, b FROM {$wpdb->sitemeta} a, {$wpdb->sitemeta} b
WHERE a.meta_key LIKE %s
AND a.meta_key NOT LIKE %s
AND b.meta_key = CONCAT( '_site_transient_timeout_', SUBSTRING( a.meta_key, 17 ) )
AND b.meta_value < %d",
$wpdb->esc_like( '_site_transient_' ) . '%',
$wpdb->esc_like( '_site_transient_timeout_' ) . '%',
"DELETE a, b
FROM {$wpdb->sitemeta} a
JOIN {$wpdb->sitemeta} b
ON b.meta_key = CONCAT( '_site_transient_timeout_', SUBSTRING( a.meta_key, 17 ) )
WHERE a.meta_key LIKE %s
AND a.meta_key NOT LIKE %s
AND b.meta_value < %d",
$site_transient_like,
$site_timeout_like,
time()
)
);
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