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WordPress - Get a post by its post name (slug) and cache results.
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| <?php | |
| /** | |
| * Get a post object by its post name (slug). | |
| * | |
| * @param string $slug The post name value. | |
| * @param string $post_type The post type to fetch from. Default: 'post'. | |
| * | |
| * @return \WP_Post|bool The post object if found, false if not. | |
| */ | |
| function get_post_by_slug( $slug = '', $post_type = 'post' ) { | |
| $cache = wp_cache_get( $post_type . '_by_slug_' . $slug ); | |
| if ( $cache ) { | |
| return $cache; | |
| } | |
| $posts = get_posts( | |
| [ | |
| 'name' => $slug, | |
| 'post_type' => $post_type, | |
| 'posts_per_page' => 1, | |
| 'post_status' => 'publish', | |
| ] | |
| ); | |
| if ( ! empty( $posts ) ) { | |
| wp_cache_set( $post_type . '_by_slug_' . $slug, $posts[0] ); | |
| return $posts[0]; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Clear the post by slug cache for a given post id before the new name is saved | |
| * or the post is deleted from WordPress. | |
| * | |
| * @param int $post_id The WP post id. | |
| */ | |
| function delete_post_by_slug_cache( $post_id ) { | |
| $saved = get_post( $post_id ); | |
| if ( $saved ) { | |
| // Strip the trashed status that is inserted before any usable hook. | |
| $post_name = str_replace( '__trashed', '', $saved->post_name ); | |
| wp_cache_delete( $saved->post_type . '_by_slug_' . $post_name ); | |
| } | |
| } | |
| add_action( 'pre_post_update', 'delete_post_by_slug_cache' ); | |
| add_action( 'delete_post', 'delete_post_by_slug_cache' ); |
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