Understanding how SEO Forge caching works helps avoid stale data and optimize performance.
Transient-Based Caching
SEO Forge caches expensive operations using WordPress transients. All sitemap transients have a 1-hour TTL. The 404 log uses a 1-week TTL. Content optimization suggestions are cached per-post for 1 hour.
Invalidating Caches After Bulk Operations
php
// After a bulk import or migration, clear all caches
SEOFORGE_Sitemap::instance()->invalidate_cache();
delete_transient( 'seoforge_404_log' );
delete_transient( 'seoforge_broken_links_cache' );
// Clear optimization cache for specific posts
$post_ids = [ 42, 55, 78 ];
foreach ( $post_ids as $pid ) {
delete_transient( 'seoforge_optimize_' . $pid );
}Object Caching Compatibility
SEO Forge uses standard WordPress transient APIs, so it is compatible with persistent object caches (Redis, Memcached). When using an object cache:
- Transients are stored in the object cache instead of the database
- TTL behavior is handled by the object cache backend
- No special configuration is needed
php
// Force-clear all SEO Forge transients (works with or without object cache)
global $wpdb;
$wpdb->query(
"DELETE FROM {$wpdb->options}
WHERE option_name LIKE '_transient_seoforge_%'
OR option_name LIKE '_transient_timeout_seoforge_%'"
);
// If using an object cache, also flush the group
if ( function_exists( 'wp_cache_flush_group' ) ) {
wp_cache_flush_group( 'transient' );
}Page Cache Compatibility
When using full-page caching (WP Super Cache, W3 Total Cache, LiteSpeed Cache, etc.), A/B testing requires special consideration. The weekly variant rotation happens on wp_head, so you must ensure the page cache respects the variant:
php
// Add a cache-busting constant for A/B testing pages
add_action( 'template_redirect', function () {
if ( ! is_singular() ) {
return;
}
$enabled = get_post_meta( get_the_ID(), '_seoforge_ab_enabled', true );
if ( $enabled ) {
// Tell caching plugins not to cache this page
if ( ! defined( 'DONOTCACHEPAGE' ) ) {
define( 'DONOTCACHEPAGE', true );
}
}
} );—