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Query: Remove placeholder from query cache key.

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Remove escape placeholder from query cache key, as placeholders are a based on a unique id on every request. This means that it is impossible for a cache to be reused, making queries that use escape placeholders such as `LIKE` searches, unable to be cached.  

Props dhl, spacedmonkey, peterwilsoncc, desrosj, chaion07, davidbaumwald, mukesh27.
Fixes #56802.

git-svn-id: https://develop.svn.wordpress.org/trunk@54634 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Jonny Harris
2022-10-18 15:06:48 +00:00
parent 6846467abd
commit 7b176e6dea
2 changed files with 84 additions and 2 deletions
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19
src/wp-includes/class-wp-query.php
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@@ -3115,10 +3115,12 @@ class WP_Query {
$cache_args['update_post_meta_cache'],
$cache_args['update_post_term_cache'],
$cache_args['lazy_load_term_meta'],
$cache_args['update_menu_item_cache']
$cache_args['update_menu_item_cache'],
$cache_args['search_orderby_title']
);
$new_request = str_replace( $fields, "{$wpdb->posts}.*", $this->request );
$new_request = $wpdb->remove_placeholder_escape( $new_request );
$key = md5( serialize( $cache_args ) . $new_request );
$last_changed = wp_cache_get_last_changed( 'posts' );
@@ -3126,7 +3128,20 @@ class WP_Query {
$last_changed .= wp_cache_get_last_changed( 'terms' );
}
$cache_key = "wp_query:$key:$last_changed";
$cache_key = "wp_query:$key:$last_changed";
/**
* Filters query cache key.
*
* @since 6.1.0
*
* @param string $cache_key Cache key.
* @param array $cache_args Query args used to generate the cache key.
* @param string $new_request SQL Query.
* @param WP_Query $query The WP_Query instance.
*/
$cache_key = apply_filters( 'wp_query_cache_key', $cache_key, $cache_args, $new_request, $this );
$cache_found = false;
if ( null === $this->posts ) {
$cached_results = wp_cache_get( $cache_key, 'posts', false, $cache_found );