WordPress 3.4
[autoinstalls/wordpress.git] / wp-includes / query.php
index ed08ebc450ec8be5bbebd8aa36aefad0487f8bfa..5f6ccddfb8a10a1b0e302f5ac74b561f03cff199 100644 (file)
@@ -27,9 +27,8 @@ function get_query_var($var) {
        return $wp_query->get($var);
 }
 
        return $wp_query->get($var);
 }
 
-
 /**
 /**
- * Retrieve the currently-queried object.  Wrapper for $wp_query->get_queried_object()
+ * Retrieve the currently-queried object. Wrapper for $wp_query->get_queried_object()
  *
  * @uses WP_Query::get_queried_object
  *
  *
  * @uses WP_Query::get_queried_object
  *
@@ -89,7 +88,7 @@ function set_query_var($var, $value) {
  */
 function &query_posts($query) {
        unset($GLOBALS['wp_query']);
  */
 function &query_posts($query) {
        unset($GLOBALS['wp_query']);
-       $GLOBALS['wp_query'] =& new WP_Query();
+       $GLOBALS['wp_query'] = new WP_Query();
        return $GLOBALS['wp_query']->query($query);
 }
 
        return $GLOBALS['wp_query']->query($query);
 }
 
@@ -105,7 +104,7 @@ function &query_posts($query) {
  */
 function wp_reset_query() {
        unset($GLOBALS['wp_query']);
  */
 function wp_reset_query() {
        unset($GLOBALS['wp_query']);
-       $GLOBALS['wp_query'] =& $GLOBALS['wp_the_query'];
+       $GLOBALS['wp_query'] = $GLOBALS['wp_the_query'];
        wp_reset_postdata();
 }
 
        wp_reset_postdata();
 }
 
@@ -715,8 +714,20 @@ function is_404() {
        return $wp_query->is_404();
 }
 
        return $wp_query->is_404();
 }
 
+/**
+ * Is the query the main query?
+ *
+ * @since 3.3.0
+ *
+ * @return bool
+ */
+function is_main_query() {
+       global $wp_query;
+       return $wp_query->is_main_query();
+}
+
 /*
 /*
- * The Loop.  Post loop control.
+ * The Loop. Post loop control.
  */
 
 /**
  */
 
 /**
@@ -848,6 +859,15 @@ class WP_Query {
         */
        var $tax_query;
 
         */
        var $tax_query;
 
+       /**
+        * Metadata query container
+        *
+        * @since 3.2.0
+        * @access public
+        * @var object WP_Meta_Query
+        */
+       var $meta_query = false;
+
        /**
         * Holds the data for a single object that is queried.
         *
        /**
         * Holds the data for a single object that is queried.
         *
@@ -1240,7 +1260,7 @@ class WP_Query {
        var $query_vars_hash = false;
 
        /**
        var $query_vars_hash = false;
 
        /**
-        * Whether query vars have changed since the initial parse_query() call.  Used to catch modifications to query vars made
+        * Whether query vars have changed since the initial parse_query() call. Used to catch modifications to query vars made
         * via pre_get_posts hooks.
         *
         * @since 3.1.1
         * via pre_get_posts hooks.
         *
         * @since 3.1.1
@@ -1248,6 +1268,15 @@ class WP_Query {
         */
        var $query_vars_changed = true;
 
         */
        var $query_vars_changed = true;
 
+       /**
+        * Set if post thumbnails are cached
+        *
+        * @since 3.2.0
+        * @access public
+        * @var bool
+        */
+        var $thumbnails_cached = false;
+
        /**
         * Resets query flags to false.
         *
        /**
         * Resets query flags to false.
         *
@@ -1424,7 +1453,7 @@ class WP_Query {
                if ( '' !== $qv['minute'] ) $qv['minute'] = absint($qv['minute']);
                if ( '' !== $qv['second'] ) $qv['second'] = absint($qv['second']);
 
                if ( '' !== $qv['minute'] ) $qv['minute'] = absint($qv['minute']);
                if ( '' !== $qv['second'] ) $qv['second'] = absint($qv['second']);
 
-               // Compat.  Map subpost to attachment.
+               // Compat. Map subpost to attachment.
                if ( '' != $qv['subpost'] )
                        $qv['attachment'] = $qv['subpost'];
                if ( '' != $qv['subpost_id'] )
                if ( '' != $qv['subpost'] )
                        $qv['attachment'] = $qv['subpost'];
                if ( '' != $qv['subpost_id'] )
@@ -1447,7 +1476,7 @@ class WP_Query {
                        $this->is_page = true;
                        $this->is_single = false;
                } else {
                        $this->is_page = true;
                        $this->is_single = false;
                } else {
-               // Look for archive queries.  Dates, categories, authors, search, post type archives.
+               // Look for archive queries. Dates, categories, authors, search, post type archives.
 
                        if ( !empty($qv['s']) ) {
                                $this->is_search = true;
 
                        if ( !empty($qv['s']) ) {
                                $this->is_search = true;
@@ -1525,8 +1554,6 @@ class WP_Query {
                        }
                        unset( $tax_query );
 
                        }
                        unset( $tax_query );
 
-                       _parse_meta_query( $qv );
-
                        if ( empty($qv['author']) || ($qv['author'] == '0') ) {
                                $this->is_author = false;
                        } else {
                        if ( empty($qv['author']) || ($qv['author'] == '0') ) {
                                $this->is_author = false;
                        } else {
@@ -1597,7 +1624,7 @@ class WP_Query {
                }
 
                if ( '' != $qv['pagename'] ) {
                }
 
                if ( '' != $qv['pagename'] ) {
-                       $this->queried_object =& get_page_by_path($qv['pagename']);
+                       $this->queried_object = get_page_by_path($qv['pagename']);
                        if ( !empty($this->queried_object) )
                                $this->queried_object_id = (int) $this->queried_object->ID;
                        else
                        if ( !empty($this->queried_object) )
                                $this->queried_object_id = (int) $this->queried_object->ID;
                        else
@@ -1625,8 +1652,12 @@ class WP_Query {
                                $qv['post_type'] = sanitize_key($qv['post_type']);
                }
 
                                $qv['post_type'] = sanitize_key($qv['post_type']);
                }
 
-               if ( !empty($qv['post_status']) )
-                       $qv['post_status'] = preg_replace('|[^a-z0-9_,-]|', '', $qv['post_status']);
+               if ( ! empty( $qv['post_status'] ) ) {
+                       if ( is_array( $qv['post_status'] ) )
+                               $qv['post_status'] = array_map('sanitize_key', $qv['post_status']);
+                       else
+                               $qv['post_status'] = preg_replace('|[^a-z0-9_,-]|', '', $qv['post_status']);
+               }
 
                if ( $this->is_posts_page && ( ! isset($qv['withcomments']) || ! $qv['withcomments'] ) )
                        $this->is_comment_feed = false;
 
                if ( $this->is_posts_page && ( ! isset($qv['withcomments']) || ! $qv['withcomments'] ) )
                        $this->is_comment_feed = false;
@@ -1806,7 +1837,7 @@ class WP_Query {
                }
 
                if ( !empty($q['tag_slug__in']) ) {
                }
 
                if ( !empty($q['tag_slug__in']) ) {
-                       $q['tag_slug__in'] = array_map('sanitize_title', array_unique( (array) $q['tag_slug__in'] ) );
+                       $q['tag_slug__in'] = array_map('sanitize_title_for_query', array_unique( (array) $q['tag_slug__in'] ) );
                        $tax_query[] = array(
                                'taxonomy' => 'post_tag',
                                'terms' => $q['tag_slug__in'],
                        $tax_query[] = array(
                                'taxonomy' => 'post_tag',
                                'terms' => $q['tag_slug__in'],
@@ -1815,7 +1846,7 @@ class WP_Query {
                }
 
                if ( !empty($q['tag_slug__and']) ) {
                }
 
                if ( !empty($q['tag_slug__and']) ) {
-                       $q['tag_slug__and'] = array_map('sanitize_title', array_unique( (array) $q['tag_slug__and'] ) );
+                       $q['tag_slug__and'] = array_map('sanitize_title_for_query', array_unique( (array) $q['tag_slug__and'] ) );
                        $tax_query[] = array(
                                'taxonomy' => 'post_tag',
                                'terms' => $q['tag_slug__and'],
                        $tax_query[] = array(
                                'taxonomy' => 'post_tag',
                                'terms' => $q['tag_slug__and'],
@@ -1896,6 +1927,10 @@ class WP_Query {
                // Fill again in case pre_get_posts unset some vars.
                $q = $this->fill_query_vars($q);
 
                // Fill again in case pre_get_posts unset some vars.
                $q = $this->fill_query_vars($q);
 
+               // Parse meta query
+               $this->meta_query = new WP_Meta_Query();
+               $this->meta_query->parse_query_vars( $q );
+
                // Set a flag if a pre_get_posts hook changed the query vars.
                $hash = md5( serialize( $this->query_vars ) );
                if ( $hash != $this->query_vars_hash ) {
                // Set a flag if a pre_get_posts hook changed the query vars.
                $hash = md5( serialize( $this->query_vars ) );
                if ( $hash != $this->query_vars_hash ) {
@@ -2113,7 +2148,7 @@ class WP_Query {
                if ( intval($q['comments_popup']) )
                        $q['p'] = absint($q['comments_popup']);
 
                if ( intval($q['comments_popup']) )
                        $q['p'] = absint($q['comments_popup']);
 
-               // If an attachment is requested by number, let it supercede any post number.
+               // If an attachment is requested by number, let it supersede any post number.
                if ( $q['attachment_id'] )
                        $q['p'] = absint($q['attachment_id']);
 
                if ( $q['attachment_id'] )
                        $q['p'] = absint($q['attachment_id']);
 
@@ -2145,7 +2180,7 @@ class WP_Query {
                        if ( !empty($q['sentence']) ) {
                                $q['search_terms'] = array($q['s']);
                        } else {
                        if ( !empty($q['sentence']) ) {
                                $q['search_terms'] = array($q['s']);
                        } else {
-                               preg_match_all('/".*?("|$)|((?<=[\\s",+])|^)[^\\s",+]+/', $q['s'], $matches);
+                               preg_match_all('/".*?("|$)|((?<=[\r\n\t ",+])|^)[^\r\n\t ",+]+/', $q['s'], $matches);
                                $q['search_terms'] = array_map('_search_terms_tidy', $matches[0]);
                        }
                        $n = !empty($q['exact']) ? '' : '%';
                                $q['search_terms'] = array_map('_search_terms_tidy', $matches[0]);
                        }
                        $n = !empty($q['exact']) ? '' : '%';
@@ -2155,9 +2190,6 @@ class WP_Query {
                                $search .= "{$searchand}(($wpdb->posts.post_title LIKE '{$n}{$term}{$n}') OR ($wpdb->posts.post_content LIKE '{$n}{$term}{$n}'))";
                                $searchand = ' AND ';
                        }
                                $search .= "{$searchand}(($wpdb->posts.post_title LIKE '{$n}{$term}{$n}') OR ($wpdb->posts.post_content LIKE '{$n}{$term}{$n}'))";
                                $searchand = ' AND ';
                        }
-                       $term = esc_sql( like_escape( $q['s'] ) );
-                       if ( empty($q['sentence']) && count($q['search_terms']) > 1 && $q['search_terms'][0] != $q['s'] )
-                               $search .= " OR ($wpdb->posts.post_title LIKE '{$n}{$term}{$n}') OR ($wpdb->posts.post_content LIKE '{$n}{$term}{$n}')";
 
                        if ( !empty($search) ) {
                                $search = " AND ({$search}) ";
 
                        if ( !empty($search) ) {
                                $search = " AND ({$search}) ";
@@ -2231,7 +2263,7 @@ class WP_Query {
                        }
                }
 
                        }
                }
 
-               if ( !empty( $this->tax_query->queries ) || !empty( $q['meta_key'] ) ) {
+               if ( !empty( $this->tax_query->queries ) || !empty( $this->meta_query->queries ) ) {
                        $groupby = "{$wpdb->posts}.ID";
                }
 
                        $groupby = "{$wpdb->posts}.ID";
                }
 
@@ -2267,7 +2299,7 @@ class WP_Query {
                                if ( $q['author_name'][ count($q['author_name'])-1 ] ) {
                                        $q['author_name'] = $q['author_name'][count($q['author_name'])-1]; // no trailing slash
                                } else {
                                if ( $q['author_name'][ count($q['author_name'])-1 ] ) {
                                        $q['author_name'] = $q['author_name'][count($q['author_name'])-1]; // no trailing slash
                                } else {
-                                       $q['author_name'] = $q['author_name'][count($q['author_name'])-2]; // there was a trailling slash
+                                       $q['author_name'] = $q['author_name'][count($q['author_name'])-2]; // there was a trailing slash
                                }
                        }
                        $q['author_name'] = sanitize_title_for_query( $q['author_name'] );
                                }
                        }
                        $q['author_name'] = sanitize_title_for_query( $q['author_name'] );
@@ -2279,10 +2311,8 @@ class WP_Query {
 
                // MIME-Type stuff for attachment browsing
 
 
                // MIME-Type stuff for attachment browsing
 
-               if ( isset($q['post_mime_type']) && '' != $q['post_mime_type'] ) {
-                       $table_alias = $post_status_join ? $wpdb->posts : '';
-                       $whichmimetype = wp_post_mime_type_where($q['post_mime_type'], $table_alias);
-               }
+               if ( isset( $q['post_mime_type'] ) && '' != $q['post_mime_type'] )
+                       $whichmimetype = wp_post_mime_type_where( $q['post_mime_type'], $wpdb->posts );
 
                $where .= $search . $whichauthor . $whichmimetype;
 
 
                $where .= $search . $whichauthor . $whichmimetype;
 
@@ -2291,12 +2321,12 @@ class WP_Query {
 
                // Order by
                if ( empty($q['orderby']) ) {
 
                // Order by
                if ( empty($q['orderby']) ) {
-                       $q['orderby'] = "$wpdb->posts.post_date " . $q['order'];
+                       $orderby = "$wpdb->posts.post_date " . $q['order'];
                } elseif ( 'none' == $q['orderby'] ) {
                } elseif ( 'none' == $q['orderby'] ) {
-                       $q['orderby'] = '';
+                       $orderby = '';
                } else {
                        // Used to filter values
                } else {
                        // Used to filter values
-                       $allowed_keys = array('author', 'date', 'title', 'modified', 'menu_order', 'parent', 'ID', 'rand', 'comment_count');
+                       $allowed_keys = array('name', 'author', 'date', 'title', 'modified', 'menu_order', 'parent', 'ID', 'rand', 'comment_count');
                        if ( !empty($q['meta_key']) ) {
                                $allowed_keys[] = $q['meta_key'];
                                $allowed_keys[] = 'meta_value';
                        if ( !empty($q['meta_key']) ) {
                                $allowed_keys[] = $q['meta_key'];
                                $allowed_keys[] = 'meta_value';
@@ -2304,16 +2334,16 @@ class WP_Query {
                        }
                        $q['orderby'] = urldecode($q['orderby']);
                        $q['orderby'] = addslashes_gpc($q['orderby']);
                        }
                        $q['orderby'] = urldecode($q['orderby']);
                        $q['orderby'] = addslashes_gpc($q['orderby']);
-                       $orderby_array = explode(' ', $q['orderby']);
-                       $q['orderby'] = '';
 
 
-                       foreach ( $orderby_array as $i => $orderby ) {
+                       $orderby_array = array();
+                       foreach ( explode( ' ', $q['orderby'] ) as $i => $orderby ) {
                                // Only allow certain values for safety
                                if ( ! in_array($orderby, $allowed_keys) )
                                        continue;
 
                                switch ( $orderby ) {
                                        case 'menu_order':
                                // Only allow certain values for safety
                                if ( ! in_array($orderby, $allowed_keys) )
                                        continue;
 
                                switch ( $orderby ) {
                                        case 'menu_order':
+                                               $orderby = "$wpdb->posts.menu_order";
                                                break;
                                        case 'ID':
                                                $orderby = "$wpdb->posts.ID";
                                                break;
                                        case 'ID':
                                                $orderby = "$wpdb->posts.ID";
@@ -2335,15 +2365,14 @@ class WP_Query {
                                                $orderby = "$wpdb->posts.post_" . $orderby;
                                }
 
                                                $orderby = "$wpdb->posts.post_" . $orderby;
                                }
 
-                               $q['orderby'] .= (($i == 0) ? '' : ',') . $orderby;
+                               $orderby_array[] = $orderby;
                        }
                        }
+                       $orderby = implode( ',', $orderby_array );
 
 
-                       // append ASC or DESC at the end
-                       if ( !empty($q['orderby']))
-                               $q['orderby'] .= " {$q['order']}";
-
-                       if ( empty($q['orderby']) )
-                               $q['orderby'] = "$wpdb->posts.post_date ".$q['order'];
+                       if ( empty( $orderby ) )
+                               $orderby = "$wpdb->posts.post_date ".$q['order'];
+                       else
+                               $orderby .= " {$q['order']}";
                }
 
                if ( is_array( $post_type ) ) {
                }
 
                if ( is_array( $post_type ) ) {
@@ -2354,13 +2383,10 @@ class WP_Query {
                                $post_type_cap = $post_type;
                }
 
                                $post_type_cap = $post_type;
                }
 
-               $exclude_post_types = '';
-               $in_search_post_types = get_post_types( array('exclude_from_search' => false) );
-               if ( ! empty( $in_search_post_types ) )
-                       $exclude_post_types .= $wpdb->prepare(" AND $wpdb->posts.post_type IN ('" . join("', '", $in_search_post_types ) . "')");
-
                if ( 'any' == $post_type ) {
                if ( 'any' == $post_type ) {
-                       $where .= $exclude_post_types;
+                       $in_search_post_types = get_post_types( array('exclude_from_search' => false) );
+                       if ( ! empty( $in_search_post_types ) )
+                               $where .= $wpdb->prepare(" AND $wpdb->posts.post_type IN ('" . join("', '", $in_search_post_types ) . "')");
                } elseif ( !empty( $post_type ) && is_array( $post_type ) ) {
                        $where .= " AND $wpdb->posts.post_type IN ('" . join("', '", $post_type) . "')";
                } elseif ( ! empty( $post_type ) ) {
                } elseif ( !empty( $post_type ) && is_array( $post_type ) ) {
                        $where .= " AND $wpdb->posts.post_type IN ('" . join("', '", $post_type) . "')";
                } elseif ( ! empty( $post_type ) ) {
@@ -2389,13 +2415,15 @@ class WP_Query {
                        $read_private_cap = 'read_private_' . $post_type_cap . 's';
                }
 
                        $read_private_cap = 'read_private_' . $post_type_cap . 's';
                }
 
-               if ( isset($q['post_status']) && '' != $q['post_status'] ) {
+               if ( ! empty( $q['post_status'] ) ) {
                        $statuswheres = array();
                        $statuswheres = array();
-                       $q_status = explode(',', $q['post_status']);
+                       $q_status = $q['post_status'];
+                       if ( ! is_array( $q_status ) )
+                               $q_status = explode(',', $q_status);
                        $r_status = array();
                        $p_status = array();
                        $e_status = array();
                        $r_status = array();
                        $p_status = array();
                        $e_status = array();
-                       if ( $q['post_status'] == 'any' ) {
+                       if ( in_array('any', $q_status) ) {
                                foreach ( get_post_stati( array('exclude_from_search' => true) ) as $status )
                                        $e_status[] = "$wpdb->posts.post_status <> '$status'";
                        } else {
                                foreach ( get_post_stati( array('exclude_from_search' => true) ) as $status )
                                        $e_status[] = "$wpdb->posts.post_status <> '$status'";
                        } else {
@@ -2419,13 +2447,13 @@ class WP_Query {
                        }
                        if ( !empty($r_status) ) {
                                if ( !empty($q['perm'] ) && 'editable' == $q['perm'] && !current_user_can($edit_others_cap) )
                        }
                        if ( !empty($r_status) ) {
                                if ( !empty($q['perm'] ) && 'editable' == $q['perm'] && !current_user_can($edit_others_cap) )
-                                       $statuswheres[] = "($wpdb->posts.post_author = $user_ID " .  "AND (" . join( ' OR ', $r_status ) . "))";
+                                       $statuswheres[] = "($wpdb->posts.post_author = $user_ID " . "AND (" . join( ' OR ', $r_status ) . "))";
                                else
                                        $statuswheres[] = "(" . join( ' OR ', $r_status ) . ")";
                        }
                        if ( !empty($p_status) ) {
                                if ( !empty($q['perm'] ) && 'readable' == $q['perm'] && !current_user_can($read_private_cap) )
                                else
                                        $statuswheres[] = "(" . join( ' OR ', $r_status ) . ")";
                        }
                        if ( !empty($p_status) ) {
                                if ( !empty($q['perm'] ) && 'readable' == $q['perm'] && !current_user_can($read_private_cap) )
-                                       $statuswheres[] = "($wpdb->posts.post_author = $user_ID " .  "AND (" . join( ' OR ', $p_status ) . "))";
+                                       $statuswheres[] = "($wpdb->posts.post_author = $user_ID " . "AND (" . join( ' OR ', $p_status ) . "))";
                                else
                                        $statuswheres[] = "(" . join( ' OR ', $p_status ) . ")";
                        }
                                else
                                        $statuswheres[] = "(" . join( ' OR ', $p_status ) . ")";
                        }
@@ -2447,7 +2475,7 @@ class WP_Query {
                                $where .= " OR $wpdb->posts.post_status = '$state'";
                        }
 
                                $where .= " OR $wpdb->posts.post_status = '$state'";
                        }
 
-                       if ( is_admin() ) {
+                       if ( $this->is_admin ) {
                                // Add protected states that should show in the admin all list.
                                $admin_all_states = get_post_stati( array('protected' => true, 'show_in_admin_all_list' => true) );
                                foreach ( (array) $admin_all_states as $state )
                                // Add protected states that should show in the admin all list.
                                $admin_all_states = get_post_stati( array('protected' => true, 'show_in_admin_all_list' => true) );
                                foreach ( (array) $admin_all_states as $state )
@@ -2464,18 +2492,8 @@ class WP_Query {
                        $where .= ')';
                }
 
                        $where .= ')';
                }
 
-               // Parse the meta query again if query vars have changed.
-               if ( $this->query_vars_changed ) {
-                       $meta_query_hash = md5( serialize( $q['meta_query'] ) );
-                       $_meta_query = $q['meta_query'];
-                       unset( $q['meta_query'] );
-                       _parse_meta_query( $q );
-                       if ( md5( serialize( $q['meta_query'] ) ) != $meta_query_hash && is_array( $_meta_query ) )
-                               $q['meta_query'] = array_merge( $_meta_query, $q['meta_query'] );
-               }
-
-               if ( !empty( $q['meta_query'] ) ) {
-                       $clauses = call_user_func_array( '_get_meta_sql', array( $q['meta_query'], 'post', $wpdb->posts, 'ID', &$this) );
+               if ( !empty( $this->meta_query->queries ) ) {
+                       $clauses = $this->meta_query->get_sql( 'post', $wpdb->posts, 'ID', $this );
                        $join .= $clauses['join'];
                        $where .= $clauses['where'];
                }
                        $join .= $clauses['join'];
                        $where .= $clauses['where'];
                }
@@ -2490,18 +2508,16 @@ class WP_Query {
                // Paging
                if ( empty($q['nopaging']) && !$this->is_singular ) {
                        $page = absint($q['paged']);
                // Paging
                if ( empty($q['nopaging']) && !$this->is_singular ) {
                        $page = absint($q['paged']);
-                       if ( empty($page) )
+                       if ( !$page )
                                $page = 1;
 
                        if ( empty($q['offset']) ) {
                                $page = 1;
 
                        if ( empty($q['offset']) ) {
-                               $pgstrt = '';
                                $pgstrt = ($page - 1) * $q['posts_per_page'] . ', ';
                                $pgstrt = ($page - 1) * $q['posts_per_page'] . ', ';
-                               $limits = 'LIMIT ' . $pgstrt . $q['posts_per_page'];
                        } else { // we're ignoring $page and using 'offset'
                                $q['offset'] = absint($q['offset']);
                                $pgstrt = $q['offset'] . ', ';
                        } else { // we're ignoring $page and using 'offset'
                                $q['offset'] = absint($q['offset']);
                                $pgstrt = $q['offset'] . ', ';
-                               $limits = 'LIMIT ' . $pgstrt . $q['posts_per_page'];
                        }
                        }
+                       $limits = 'LIMIT ' . $pgstrt . $q['posts_per_page'];
                }
 
                // Comments feeds
                }
 
                // Comments feeds
@@ -2542,11 +2558,9 @@ class WP_Query {
                                $where = "AND 0";
                }
 
                                $where = "AND 0";
                }
 
-               $orderby = $q['orderby'];
-
                $pieces = array( 'where', 'groupby', 'join', 'orderby', 'distinct', 'fields', 'limits' );
 
                $pieces = array( 'where', 'groupby', 'join', 'orderby', 'distinct', 'fields', 'limits' );
 
-               // Apply post-paging filters on where and join.  Only plugins that
+               // Apply post-paging filters on where and join. Only plugins that
                // manipulate paging queries should use these hooks.
                if ( !$q['suppress_filters'] ) {
                        $where          = apply_filters_ref_array( 'posts_where_paged', array( $where, &$this ) );
                // manipulate paging queries should use these hooks.
                if ( !$q['suppress_filters'] ) {
                        $where          = apply_filters_ref_array( 'posts_where_paged', array( $where, &$this ) );
@@ -2563,10 +2577,10 @@ class WP_Query {
                                $$piece = isset( $clauses[ $piece ] ) ? $clauses[ $piece ] : '';
                }
 
                                $$piece = isset( $clauses[ $piece ] ) ? $clauses[ $piece ] : '';
                }
 
-               // Announce current selection parameters.  For use by caching plugins.
+               // Announce current selection parameters. For use by caching plugins.
                do_action( 'posts_selection', $where . $groupby . $orderby . $limits . $join );
 
                do_action( 'posts_selection', $where . $groupby . $orderby . $limits . $join );
 
-               // Filter again for the benefit of caching plugins.  Regular plugins should use the hooks above.
+               // Filter again for the benefit of caching plugins. Regular plugins should use the hooks above.
                if ( !$q['suppress_filters'] ) {
                        $where          = apply_filters_ref_array( 'posts_where_request',               array( $where, &$this ) );
                        $groupby        = apply_filters_ref_array( 'posts_groupby_request',             array( $groupby, &$this ) );
                if ( !$q['suppress_filters'] ) {
                        $where          = apply_filters_ref_array( 'posts_where_request',               array( $where, &$this ) );
                        $groupby        = apply_filters_ref_array( 'posts_groupby_request',             array( $groupby, &$this ) );
@@ -2591,9 +2605,11 @@ class WP_Query {
                if ( !$q['no_found_rows'] && !empty($limits) )
                        $found_rows = 'SQL_CALC_FOUND_ROWS';
 
                if ( !$q['no_found_rows'] && !empty($limits) )
                        $found_rows = 'SQL_CALC_FOUND_ROWS';
 
-               $this->request = " SELECT $found_rows $distinct $fields FROM $wpdb->posts $join WHERE 1=1 $where $groupby $orderby $limits";
-               if ( !$q['suppress_filters'] )
-                       $this->request = apply_filters_ref_array('posts_request', array( $this->request, &$this ) );
+               $this->request = $old_request = "SELECT $found_rows $distinct $fields FROM $wpdb->posts $join WHERE 1=1 $where $groupby $orderby $limits";
+
+               if ( !$q['suppress_filters'] ) {
+                       $this->request = apply_filters_ref_array( 'posts_request', array( $this->request, &$this ) );
+               }
 
                if ( 'ids' == $q['fields'] ) {
                        $this->posts = $wpdb->get_col($this->request);
 
                if ( 'ids' == $q['fields'] ) {
                        $this->posts = $wpdb->get_col($this->request);
@@ -2611,9 +2627,34 @@ class WP_Query {
                        return $r;
                }
 
                        return $r;
                }
 
-               $this->posts = $wpdb->get_results($this->request);
+               $split_the_query = ( $old_request == $this->request && "$wpdb->posts.*" == $fields && !empty( $limits ) && $q['posts_per_page'] < 500 );
+               $split_the_query = apply_filters( 'split_the_query', $split_the_query, $this );
+
+               if ( $split_the_query ) {
+                       // First get the IDs and then fill in the objects
+
+                       $this->request = "SELECT $found_rows $distinct $wpdb->posts.ID FROM $wpdb->posts $join WHERE 1=1 $where $groupby $orderby $limits";
+
+                       $this->request = apply_filters( 'posts_request_ids', $this->request, $this );
 
 
-               // Raw results filter.  Prior to status checks.
+                       $ids = $wpdb->get_col( $this->request );
+
+                       if ( $ids ) {
+                               $this->set_found_posts( $q, $limits );
+
+                               _prime_post_caches( $ids, $q['update_post_term_cache'], $q['update_post_meta_cache'] );
+
+                               $this->posts = array_map( 'get_post', $ids );
+                       } else {
+                               $this->found_posts = $this->max_num_pages = 0;
+                               $this->posts = array();
+                       }
+               } else {
+                       $this->posts = $wpdb->get_results( $this->request );
+                       $this->set_found_posts( $q, $limits );
+               }
+
+               // Raw results filter. Prior to status checks.
                if ( !$q['suppress_filters'] )
                        $this->posts = apply_filters_ref_array('posts_results', array( $this->posts, &$this ) );
 
                if ( !$q['suppress_filters'] )
                        $this->posts = apply_filters_ref_array('posts_results', array( $this->posts, &$this ) );
 
@@ -2630,13 +2671,6 @@ class WP_Query {
                        $this->comment_count = count($this->comments);
                }
 
                        $this->comment_count = count($this->comments);
                }
 
-               if ( !$q['no_found_rows'] && !empty($limits) ) {
-                       $found_posts_query = apply_filters_ref_array( 'found_posts_query', array( 'SELECT FOUND_ROWS()', &$this ) );
-                       $this->found_posts = $wpdb->get_var( $found_posts_query );
-                       $this->found_posts = apply_filters_ref_array( 'found_posts', array( $this->found_posts, &$this ) );
-                       $this->max_num_pages = ceil($this->found_posts / $q['posts_per_page']);
-               }
-
                // Check post status to determine if post should be displayed.
                if ( !empty($this->posts) && ($this->is_single || $this->is_page) ) {
                        $status = get_post_status($this->posts[0]);
                // Check post status to determine if post should be displayed.
                if ( !empty($this->posts) && ($this->is_single || $this->is_page) ) {
                        $status = get_post_status($this->posts[0]);
@@ -2665,7 +2699,7 @@ class WP_Query {
                                }
                        }
 
                                }
                        }
 
-                       if ( $this->is_preview && current_user_can( $edit_cap, $this->posts[0]->ID ) )
+                       if ( $this->is_preview && $this->posts && current_user_can( $edit_cap, $this->posts[0]->ID ) )
                                $this->posts[0] = apply_filters_ref_array('the_preview', array( $this->posts[0], &$this ));
                }
 
                                $this->posts[0] = apply_filters_ref_array('the_preview', array( $this->posts[0], &$this ));
                }
 
@@ -2682,7 +2716,7 @@ class WP_Query {
                                        array_splice($this->posts, $i, 1);
                                        // Move to front, after other stickies
                                        array_splice($this->posts, $sticky_offset, 0, array($sticky_post));
                                        array_splice($this->posts, $i, 1);
                                        // Move to front, after other stickies
                                        array_splice($this->posts, $sticky_offset, 0, array($sticky_post));
-                                       // Increment the sticky offset.  The next sticky will be placed at this offset.
+                                       // Increment the sticky offset. The next sticky will be placed at this offset.
                                        $sticky_offset++;
                                        // Remove post from sticky posts array
                                        $offset = array_search($sticky_post->ID, $sticky_posts);
                                        $sticky_offset++;
                                        // Remove post from sticky posts array
                                        $offset = array_search($sticky_post->ID, $sticky_posts);
@@ -2724,9 +2758,9 @@ class WP_Query {
 
                $this->post_count = count($this->posts);
 
 
                $this->post_count = count($this->posts);
 
-               // Sanitize before caching so it'll only get done once
-               for ( $i = 0; $i < $this->post_count; $i++ ) {
-                       $this->posts[$i] = sanitize_post($this->posts[$i], 'raw');
+               // Always sanitize
+               foreach ( $this->posts as $i => $post ) {
+                       $this->posts[$i] = sanitize_post( $post, 'raw' );
                }
 
                if ( $q['cache_results'] )
                }
 
                if ( $q['cache_results'] )
@@ -2739,6 +2773,18 @@ class WP_Query {
                return $this->posts;
        }
 
                return $this->posts;
        }
 
+       function set_found_posts( $q, $limits ) {
+               global $wpdb;
+
+               if ( $q['no_found_rows'] || empty( $limits ) )
+                       return;
+
+               $this->found_posts = $wpdb->get_var( apply_filters_ref_array( 'found_posts_query', array( 'SELECT FOUND_ROWS()', &$this ) ) );
+               $this->found_posts = apply_filters_ref_array( 'found_posts', array( $this->found_posts, &$this ) );
+
+               $this->max_num_pages = ceil( $this->found_posts / $q['posts_per_page'] );
+       }
+
        /**
         * Set up the next post and iterate current post index.
         *
        /**
         * Set up the next post and iterate current post index.
         *
@@ -2911,7 +2957,7 @@ class WP_Query {
                if ( isset($this->queried_object) )
                        return $this->queried_object;
 
                if ( isset($this->queried_object) )
                        return $this->queried_object;
 
-               $this->queried_object = NULL;
+               $this->queried_object = null;
                $this->queried_object_id = 0;
 
                if ( $this->is_category || $this->is_tag || $this->is_tax ) {
                $this->queried_object_id = 0;
 
                if ( $this->is_category || $this->is_tag || $this->is_tax ) {
@@ -2935,7 +2981,7 @@ class WP_Query {
                        $this->queried_object = get_post_type_object( $this->get('post_type') );
                } elseif ( $this->is_posts_page ) {
                        $page_for_posts = get_option('page_for_posts');
                        $this->queried_object = get_post_type_object( $this->get('post_type') );
                } elseif ( $this->is_posts_page ) {
                        $page_for_posts = get_option('page_for_posts');
-                       $this->queried_object = get_page( $page_for_posts );
+                       $this->queried_object = get_page( $page_for_posts );
                        $this->queried_object_id = (int) $this->queried_object->ID;
                } elseif ( $this->is_singular && !is_null($this->post) ) {
                        $this->queried_object = $this->post;
                        $this->queried_object_id = (int) $this->queried_object->ID;
                } elseif ( $this->is_singular && !is_null($this->post) ) {
                        $this->queried_object = $this->post;
@@ -2967,7 +3013,7 @@ class WP_Query {
        }
 
        /**
        }
 
        /**
-        * PHP4 type constructor.
+        * Constructor.
         *
         * Sets up the WordPress query, if parameter is not empty.
         *
         *
         * Sets up the WordPress query, if parameter is not empty.
         *
@@ -2977,7 +3023,7 @@ class WP_Query {
         * @param string $query URL query string.
         * @return WP_Query
         */
         * @param string $query URL query string.
         * @return WP_Query
         */
-       function WP_Query($query = '') {
+       function __construct($query = '') {
                if ( ! empty($query) ) {
                        $this->query($query);
                }
                if ( ! empty($query) ) {
                        $this->query($query);
                }
@@ -3177,7 +3223,6 @@ class WP_Query {
                return (bool) $this->is_date;
        }
 
                return (bool) $this->is_date;
        }
 
-
        /**
         * Is the query for a day archive?
         *
        /**
         * Is the query for a day archive?
         *
@@ -3458,6 +3503,18 @@ class WP_Query {
        function is_404() {
                return (bool) $this->is_404;
        }
        function is_404() {
                return (bool) $this->is_404;
        }
+
+       /**
+        * Is the query the main query?
+        *
+        * @since 3.3.0
+        *
+        * @return bool
+        */
+       function is_main_query() {
+               global $wp_the_query;
+               return $wp_the_query === $this;
+       }
 }
 
 /**
 }
 
 /**
@@ -3484,6 +3541,12 @@ function wp_old_slug_redirect() {
                else
                        $post_type = 'post';
 
                else
                        $post_type = 'post';
 
+               if ( is_array( $post_type ) ) {
+                       if ( count( $post_type ) > 1 )
+                               return;
+                       $post_type = array_shift( $post_type );
+               }
+
                // Do not attempt redirect for hierarchical post types
                if ( is_post_type_hierarchical( $post_type ) )
                        return;
                // Do not attempt redirect for hierarchical post types
                if ( is_post_type_hierarchical( $post_type ) )
                        return;
@@ -3509,7 +3572,7 @@ function wp_old_slug_redirect() {
                if ( !$link )
                        return;
 
                if ( !$link )
                        return;
 
-               wp_redirect($link, '301'); // Permanent redirect
+               wp_redirect( $link, 301 ); // Permanent redirect
                exit;
        endif;
 }
                exit;
        endif;
 }
@@ -3557,4 +3620,3 @@ function setup_postdata($post) {
 
        return true;
 }
 
        return true;
 }
-?>