od, not the %3$s function. See %4$s.' ), 'pre_get_posts', 'WP_Query->is_main_query()', 'is_main_query()', __( 'https://developer.wordpress.org/reference/functions/is_main_query/' ) ), '3.7.0' ); } return $wp_query->is_main_query(); } /* * The Loop. Post loop control. */ /** * Determines whether current WordPress query has posts to loop over. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool True if posts are available, false if end of the loop. */ function have_posts() { global $wp_query; if ( ! isset( $wp_query ) ) { return false; } return $wp_query->have_posts(); } /** * Determines whether the caller is in the Loop. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 2.0.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool True if caller is within loop, false if loop hasn't started or ended. */ function in_the_loop() { global $wp_query; if ( ! isset( $wp_query ) ) { return false; } return $wp_query->in_the_loop; } /** * Rewind the loop posts. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. */ function rewind_posts() { global $wp_query; if ( ! isset( $wp_query ) ) { return; } $wp_query->rewind_posts(); } /** * Iterate the post index in the loop. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. */ function the_post() { global $wp_query; if ( ! isset( $wp_query ) ) { return; } $wp_query->the_post(); } /* * Comments loop. */ /** * Determines whether current WordPress query has comments to loop over. * * @since 2.2.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool True if comments are available, false if no more comments. */ function have_comments() { global $wp_query; if ( ! isset( $wp_query ) ) { return false; } return $wp_query->have_comments(); } /** * Iterate comment index in the comment loop. * * @since 2.2.0 * * @global WP_Query $wp_query WordPress Query object. */ function the_comment() { global $wp_query; if ( ! isset( $wp_query ) ) { return; } $wp_query->the_comment(); } /** * Redirect old slugs to the correct permalink. * * Attempts to find the current slug from the past slugs. * * @since 2.1.0 */ function wp_old_slug_redirect() { if ( is_404() && '' !== get_query_var( 'name' ) ) { // Guess the current post type based on the query vars. if ( get_query_var( 'post_type' ) ) { $post_type = get_query_var( 'post_type' ); } elseif ( get_query_var( 'attachment' ) ) { $post_type = 'attachment'; } elseif ( get_query_var( 'pagename' ) ) { $post_type = 'page'; } else { $post_type = 'post'; } if ( is_array( $post_type ) ) { if ( count( $post_type ) > 1 ) { return; } $post_type = reset( $post_type ); } // Do not attempt redirect for hierarchical post types. if ( is_post_type_hierarchical( $post_type ) ) { return; } $id = _find_post_by_old_slug( $post_type ); if ( ! $id ) { $id = _find_post_by_old_date( $post_type ); } /** * Filters the old slug redirect post ID. * * @since 4.9.3 * * @param int $id The redirect post ID. */ $id = apply_filters( 'old_slug_redirect_post_id', $id ); if ( ! $id ) { return; } $link = get_permalink( $id ); if ( get_query_var( 'paged' ) > 1 ) { $link = user_trailingslashit( trailingslashit( $link ) . 'page/' . get_query_var( 'paged' ) ); } elseif ( is_embed() ) { $link = user_trailingslashit( trailingslashit( $link ) . 'embed' ); } /** * Filters the old slug redirect URL. * * @since 4.4.0 * * @param string $link The redirect URL. */ $link = apply_filters( 'old_slug_redirect_url', $link ); if ( ! $link ) { return; } wp_redirect( $link, 301 ); // Permanent redirect. exit; } } /** * Find the post ID for redirecting an old slug. * * @since 4.9.3 * @access private * * @see wp_old_slug_redirect() * @global wpdb $wpdb WordPress database abstraction object. * * @param string $post_type The current post type based on the query vars. * @return int The Post ID. */ function _find_post_by_old_slug( $post_type ) { global $wpdb; $query = $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta, $wpdb->posts WHERE ID = post_id AND post_type = %s AND meta_key = '_wp_old_slug' AND meta_value = %s", $post_type, get_query_var( 'name' ) ); /* * If year, monthnum, or day have been specified, make our query more precise * just in case there are multiple identical _wp_old_slug values. */ if ( get_query_var( 'year' ) ) { $query .= $wpdb->prepare( ' AND YEAR(post_date) = %d', get_query_var( 'year' ) ); } if ( get_query_var( 'monthnum' ) ) { $query .= $wpdb->prepare( ' AND MONTH(post_date) = %d', get_query_var( 'monthnum' ) ); } if ( get_query_var( 'day' ) ) { $query .= $wpdb->prepare( ' AND DAYOFMONTH(post_date) = %d', get_query_var( 'day' ) ); } $key = md5( $query ); $last_changed = wp_cache_get_last_changed( 'posts' ); $cache_key = "find_post_by_old_slug:$key:$last_changed"; $cache = wp_cache_get( $cache_key, 'post-queries' ); if ( false !== $cache ) { $id = $cache; } else { $id = (int) $wpdb->get_var( $query ); wp_cache_set( $cache_key, $id, 'post-queries' ); } return $id; } /** * Find the post ID for redirecting an old date. * * @since 4.9.3 * @access private * * @see wp_old_slug_redirect() * @global wpdb $wpdb WordPress database abstraction object. * * @param string $post_type The current post type based on the query vars. * @return int The Post ID. */ function _find_post_by_old_date( $post_type ) { global $wpdb; $date_query = ''; if ( get_query_var( 'year' ) ) { $date_query .= $wpdb->prepare( ' AND YEAR(pm_date.meta_value) = %d', get_query_var( 'year' ) ); } if ( get_query_var( 'monthnum' ) ) { $date_query .= $wpdb->prepare( ' AND MONTH(pm_date.meta_value) = %d', get_query_var( 'monthnum' ) ); } if ( get_query_var( 'day' ) ) { $date_query .= $wpdb->prepare( ' AND DAYOFMONTH(pm_date.meta_value) = %d', get_query_var( 'day' ) ); } $id = 0; if ( $date_query ) { $query = $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta AS pm_date, $wpdb->posts WHERE ID = post_id AND post_type = %s AND meta_key = '_wp_old_date' AND post_name = %s" . $date_query, $post_type, get_query_var( 'name' ) ); $key = md5( $query ); $last_changed = wp_cache_get_last_changed( 'posts' ); $cache_key = "find_post_by_old_date:$key:$last_changed"; $cache = wp_cache_get( $cache_key, 'post-queries' ); if ( false !== $cache ) { $id = $cache; } else { $id = (int) $wpdb->get_var( $query ); if ( ! $id ) { // Check to see if an old slug matches the old date. $id = (int) $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts, $wpdb->postmeta AS pm_slug, $wpdb->postmeta AS pm_date WHERE ID = pm_slug.post_id AND ID = pm_date.post_id AND post_type = %s AND pm_slug.meta_key = '_wp_old_slug' AND pm_slug.meta_value = %s AND pm_date.meta_key = '_wp_old_date'" . $date_query, $post_type, get_query_var( 'name' ) ) ); } wp_cache_set( $cache_key, $id, 'post-queries' ); } } return $id; } /** * Set up global post data. * * @since 1.5.0 * @since 4.4.0 Added the ability to pass a post ID to `$post`. * * @global WP_Query $wp_query WordPress Query object. * * @param WP_Post|object|int $post WP_Post instance or Post ID/object. * @return bool True when finished. */ function setup_postdata( $post ) { global $wp_query; if ( ! empty( $wp_query ) && $wp_query instanceof WP_Query ) { return $wp_query->setup_postdata( $post ); } return false; } /** * Generates post data. * * @since 5.2.0 * * @global WP_Query $wp_query WordPress Query object. * * @param WP_Post|object|int $post WP_Post instance or Post ID/object. * @return array|false Elements of post, or false on failure. */ function generate_postdata( $post ) { global $wp_query; if ( ! empty( $wp_query ) && $wp_query instanceof WP_Query ) { return $wp_query->generate_postdata( $post ); } return false; }