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- <?php
- /**
- * Post revision functions.
- *
- * @package WordPress
- * @subpackage Post_Revisions
- */
- /**
- * Determines which fields of posts are to be saved in revisions.
- *
- * @since 2.6.0
- * @since 4.5.0 A `WP_Post` object can now be passed to the `$post` parameter.
- * @since 4.5.0 The optional `$autosave` parameter was deprecated and renamed to `$deprecated`.
- * @access private
- *
- * @param array|WP_Post $post Optional. A post array or a WP_Post object being processed
- * for insertion as a post revision. Default empty array.
- * @param bool $deprecated Not used.
- * @return string[] Array of fields that can be versioned.
- */
- function _wp_post_revision_fields( $post = array(), $deprecated = false ) {
- static $fields = null;
- if ( ! is_array( $post ) ) {
- $post = get_post( $post, ARRAY_A );
- }
- if ( is_null( $fields ) ) {
- // Allow these to be versioned.
- $fields = array(
- 'post_title' => __( 'Title' ),
- 'post_content' => __( 'Content' ),
- 'post_excerpt' => __( 'Excerpt' ),
- );
- }
- /**
- * Filters the list of fields saved in post revisions.
- *
- * Included by default: 'post_title', 'post_content' and 'post_excerpt'.
- *
- * Disallowed fields: 'ID', 'post_name', 'post_parent', 'post_date',
- * 'post_date_gmt', 'post_status', 'post_type', 'comment_count',
- * and 'post_author'.
- *
- * @since 2.6.0
- * @since 4.5.0 The `$post` parameter was added.
- *
- * @param string[] $fields List of fields to revision. Contains 'post_title',
- * 'post_content', and 'post_excerpt' by default.
- * @param array $post A post array being processed for insertion as a post revision.
- */
- $fields = apply_filters( '_wp_post_revision_fields', $fields, $post );
- // WP uses these internally either in versioning or elsewhere - they cannot be versioned.
- foreach ( array( 'ID', 'post_name', 'post_parent', 'post_date', 'post_date_gmt', 'post_status', 'post_type', 'comment_count', 'post_author' ) as $protect ) {
- unset( $fields[ $protect ] );
- }
- return $fields;
- }
- /**
- * Returns a post array ready to be inserted into the posts table as a post revision.
- *
- * @since 4.5.0
- * @access private
- *
- * @param array|WP_Post $post Optional. A post array or a WP_Post object to be processed
- * for insertion as a post revision. Default empty array.
- * @param bool $autosave Optional. Is the revision an autosave? Default false.
- * @return array Post array ready to be inserted as a post revision.
- */
- function _wp_post_revision_data( $post = array(), $autosave = false ) {
- if ( ! is_array( $post ) ) {
- $post = get_post( $post, ARRAY_A );
- }
- $fields = _wp_post_revision_fields( $post );
- $revision_data = array();
- foreach ( array_intersect( array_keys( $post ), array_keys( $fields ) ) as $field ) {
- $revision_data[ $field ] = $post[ $field ];
- }
- $revision_data['post_parent'] = $post['ID'];
- $revision_data['post_status'] = 'inherit';
- $revision_data['post_type'] = 'revision';
- $revision_data['post_name'] = $autosave ? "$post[ID]-autosave-v1" : "$post[ID]-revision-v1"; // "1" is the revisioning system version.
- $revision_data['post_date'] = isset( $post['post_modified'] ) ? $post['post_modified'] : '';
- $revision_data['post_date_gmt'] = isset( $post['post_modified_gmt'] ) ? $post['post_modified_gmt'] : '';
- return $revision_data;
- }
- /**
- * Creates a revision for the current version of a post.
- *
- * Typically used immediately after a post update, as every update is a revision,
- * and the most recent revision always matches the current post.
- *
- * @since 2.6.0
- *
- * @param int $post_id The ID of the post to save as a revision.
- * @return int|WP_Error|void Void or 0 if error, new revision ID, if success.
- */
- function wp_save_post_revision( $post_id ) {
- if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
- return;
- }
- $post = get_post( $post_id );
- if ( ! $post ) {
- return;
- }
- if ( ! post_type_supports( $post->post_type, 'revisions' ) ) {
- return;
- }
- if ( 'auto-draft' === $post->post_status ) {
- return;
- }
- if ( ! wp_revisions_enabled( $post ) ) {
- return;
- }
- /*
- * Compare the proposed update with the last stored revision verifying that
- * they are different, unless a plugin tells us to always save regardless.
- * If no previous revisions, save one.
- */
- $revisions = wp_get_post_revisions( $post_id );
- if ( $revisions ) {
- // Grab the latest revision, but not an autosave.
- foreach ( $revisions as $revision ) {
- if ( false !== strpos( $revision->post_name, "{$revision->post_parent}-revision" ) ) {
- $latest_revision = $revision;
- break;
- }
- }
- /**
- * Filters whether the post has changed since the latest revision.
- *
- * By default a revision is saved only if one of the revisioned fields has changed.
- * This filter can override that so a revision is saved even if nothing has changed.
- *
- * @since 3.6.0
- *
- * @param bool $check_for_changes Whether to check for changes before saving a new revision.
- * Default true.
- * @param WP_Post $latest_revision The latest revision post object.
- * @param WP_Post $post The post object.
- */
- if ( isset( $latest_revision ) && apply_filters( 'wp_save_post_revision_check_for_changes', true, $latest_revision, $post ) ) {
- $post_has_changed = false;
- foreach ( array_keys( _wp_post_revision_fields( $post ) ) as $field ) {
- if ( normalize_whitespace( $post->$field ) !== normalize_whitespace( $latest_revision->$field ) ) {
- $post_has_changed = true;
- break;
- }
- }
- /**
- * Filters whether a post has changed.
- *
- * By default a revision is saved only if one of the revisioned fields has changed.
- * This filter allows for additional checks to determine if there were changes.
- *
- * @since 4.1.0
- *
- * @param bool $post_has_changed Whether the post has changed.
- * @param WP_Post $latest_revision The latest revision post object.
- * @param WP_Post $post The post object.
- */
- $post_has_changed = (bool) apply_filters( 'wp_save_post_revision_post_has_changed', $post_has_changed, $latest_revision, $post );
- // Don't save revision if post unchanged.
- if ( ! $post_has_changed ) {
- return;
- }
- }
- }
- $return = _wp_put_post_revision( $post );
- // If a limit for the number of revisions to keep has been set,
- // delete the oldest ones.
- $revisions_to_keep = wp_revisions_to_keep( $post );
- if ( $revisions_to_keep < 0 ) {
- return $return;
- }
- $revisions = wp_get_post_revisions( $post_id, array( 'order' => 'ASC' ) );
- $delete = count( $revisions ) - $revisions_to_keep;
- if ( $delete < 1 ) {
- return $return;
- }
- $revisions = array_slice( $revisions, 0, $delete );
- for ( $i = 0; isset( $revisions[ $i ] ); $i++ ) {
- if ( false !== strpos( $revisions[ $i ]->post_name, 'autosave' ) ) {
- continue;
- }
- wp_delete_post_revision( $revisions[ $i ]->ID );
- }
- return $return;
- }
- /**
- * Retrieves the autosaved data of the specified post.
- *
- * Returns a post object with the information that was autosaved for the specified post.
- * If the optional $user_id is passed, returns the autosave for that user, otherwise
- * returns the latest autosave.
- *
- * @since 2.6.0
- *
- * @global wpdb $wpdb WordPress database abstraction object.
- *
- * @param int $post_id The post ID.
- * @param int $user_id Optional. The post author ID.
- * @return WP_Post|false The autosaved data or false on failure or when no autosave exists.
- */
- function wp_get_post_autosave( $post_id, $user_id = 0 ) {
- global $wpdb;
- $autosave_name = $post_id . '-autosave-v1';
- $user_id_query = ( 0 !== $user_id ) ? "AND post_author = $user_id" : null;
- // Construct the autosave query.
- $autosave_query = "
- SELECT *
- FROM $wpdb->posts
- WHERE post_parent = %d
- AND post_type = 'revision'
- AND post_status = 'inherit'
- AND post_name = %s " . $user_id_query . '
- ORDER BY post_date DESC
- LIMIT 1';
- $autosave = $wpdb->get_results(
- $wpdb->prepare(
- $autosave_query,
- $post_id,
- $autosave_name
- )
- );
- if ( ! $autosave ) {
- return false;
- }
- return get_post( $autosave[0] );
- }
- /**
- * Determines if the specified post is a revision.
- *
- * @since 2.6.0
- *
- * @param int|WP_Post $post Post ID or post object.
- * @return int|false ID of revision's parent on success, false if not a revision.
- */
- function wp_is_post_revision( $post ) {
- $post = wp_get_post_revision( $post );
- if ( ! $post ) {
- return false;
- }
- return (int) $post->post_parent;
- }
- /**
- * Determines if the specified post is an autosave.
- *
- * @since 2.6.0
- *
- * @param int|WP_Post $post Post ID or post object.
- * @return int|false ID of autosave's parent on success, false if not a revision.
- */
- function wp_is_post_autosave( $post ) {
- $post = wp_get_post_revision( $post );
- if ( ! $post ) {
- return false;
- }
- if ( false !== strpos( $post->post_name, "{$post->post_parent}-autosave" ) ) {
- return (int) $post->post_parent;
- }
- return false;
- }
- /**
- * Inserts post data into the posts table as a post revision.
- *
- * @since 2.6.0
- * @access private
- *
- * @param int|WP_Post|array|null $post Post ID, post object OR post array.
- * @param bool $autosave Optional. Whether the revision is an autosave or not.
- * @return int|WP_Error WP_Error or 0 if error, new revision ID if success.
- */
- function _wp_put_post_revision( $post = null, $autosave = false ) {
- if ( is_object( $post ) ) {
- $post = get_object_vars( $post );
- } elseif ( ! is_array( $post ) ) {
- $post = get_post( $post, ARRAY_A );
- }
- if ( ! $post || empty( $post['ID'] ) ) {
- return new WP_Error( 'invalid_post', __( 'Invalid post ID.' ) );
- }
- if ( isset( $post['post_type'] ) && 'revision' === $post['post_type'] ) {
- return new WP_Error( 'post_type', __( 'Cannot create a revision of a revision' ) );
- }
- $post = _wp_post_revision_data( $post, $autosave );
- $post = wp_slash( $post ); // Since data is from DB.
- $revision_id = wp_insert_post( $post, true );
- if ( is_wp_error( $revision_id ) ) {
- return $revision_id;
- }
- if ( $revision_id ) {
- /**
- * Fires once a revision has been saved.
- *
- * @since 2.6.0
- *
- * @param int $revision_id Post revision ID.
- */
- do_action( '_wp_put_post_revision', $revision_id );
- }
- return $revision_id;
- }
- /**
- * Gets a post revision.
- *
- * @since 2.6.0
- *
- * @param int|WP_Post $post Post ID or post object.
- * @param string $output Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which
- * correspond to a WP_Post object, an associative array, or a numeric array,
- * respectively. Default OBJECT.
- * @param string $filter Optional sanitization filter. See sanitize_post().
- * @return WP_Post|array|null WP_Post (or array) on success, or null on failure.
- */
- function wp_get_post_revision( &$post, $output = OBJECT, $filter = 'raw' ) {
- $revision = get_post( $post, OBJECT, $filter );
- if ( ! $revision ) {
- return $revision;
- }
- if ( 'revision' !== $revision->post_type ) {
- return null;
- }
- if ( OBJECT === $output ) {
- return $revision;
- } elseif ( ARRAY_A === $output ) {
- $_revision = get_object_vars( $revision );
- return $_revision;
- } elseif ( ARRAY_N === $output ) {
- $_revision = array_values( get_object_vars( $revision ) );
- return $_revision;
- }
- return $revision;
- }
- /**
- * Restores a post to the specified revision.
- *
- * Can restore a past revision using all fields of the post revision, or only selected fields.
- *
- * @since 2.6.0
- *
- * @param int|WP_Post $revision Revision ID or revision object.
- * @param array $fields Optional. What fields to restore from. Defaults to all.
- * @return int|false|null Null if error, false if no fields to restore, (int) post ID if success.
- */
- function wp_restore_post_revision( $revision, $fields = null ) {
- $revision = wp_get_post_revision( $revision, ARRAY_A );
- if ( ! $revision ) {
- return $revision;
- }
- if ( ! is_array( $fields ) ) {
- $fields = array_keys( _wp_post_revision_fields( $revision ) );
- }
- $update = array();
- foreach ( array_intersect( array_keys( $revision ), $fields ) as $field ) {
- $update[ $field ] = $revision[ $field ];
- }
- if ( ! $update ) {
- return false;
- }
- $update['ID'] = $revision['post_parent'];
- $update = wp_slash( $update ); // Since data is from DB.
- $post_id = wp_update_post( $update );
- if ( ! $post_id || is_wp_error( $post_id ) ) {
- return $post_id;
- }
- // Update last edit user.
- update_post_meta( $post_id, '_edit_last', get_current_user_id() );
- /**
- * Fires after a post revision has been restored.
- *
- * @since 2.6.0
- *
- * @param int $post_id Post ID.
- * @param int $revision_id Post revision ID.
- */
- do_action( 'wp_restore_post_revision', $post_id, $revision['ID'] );
- return $post_id;
- }
- /**
- * Deletes a revision.
- *
- * Deletes the row from the posts table corresponding to the specified revision.
- *
- * @since 2.6.0
- *
- * @param int|WP_Post $revision Revision ID or revision object.
- * @return WP_Post|false|null Null or false if error, deleted post object if success.
- */
- function wp_delete_post_revision( $revision ) {
- $revision = wp_get_post_revision( $revision );
- if ( ! $revision ) {
- return $revision;
- }
- $delete = wp_delete_post( $revision->ID );
- if ( $delete ) {
- /**
- * Fires once a post revision has been deleted.
- *
- * @since 2.6.0
- *
- * @param int $revision_id Post revision ID.
- * @param WP_Post $revision Post revision object.
- */
- do_action( 'wp_delete_post_revision', $revision->ID, $revision );
- }
- return $delete;
- }
- /**
- * Returns all revisions of specified post.
- *
- * @since 2.6.0
- *
- * @see get_children()
- *
- * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
- * @param array|null $args Optional. Arguments for retrieving post revisions. Default null.
- * @return WP_Post[]|int[] Array of revision objects or IDs, or an empty array if none.
- */
- function wp_get_post_revisions( $post = 0, $args = null ) {
- $post = get_post( $post );
- if ( ! $post || empty( $post->ID ) ) {
- return array();
- }
- $defaults = array(
- 'order' => 'DESC',
- 'orderby' => 'date ID',
- 'check_enabled' => true,
- );
- $args = wp_parse_args( $args, $defaults );
- if ( $args['check_enabled'] && ! wp_revisions_enabled( $post ) ) {
- return array();
- }
- $args = array_merge(
- $args,
- array(
- 'post_parent' => $post->ID,
- 'post_type' => 'revision',
- 'post_status' => 'inherit',
- )
- );
- $revisions = get_children( $args );
- if ( ! $revisions ) {
- return array();
- }
- return $revisions;
- }
- /**
- * Returns the latest revision ID and count of revisions for a post.
- *
- * @since 6.1.0
- *
- * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
- * @return array|WP_Error {
- * Returns associative array with latest revision ID and total count,
- * or a WP_Error if the post does not exist or revisions are not enabled.
- *
- * @type int $latest_id The latest revision post ID or 0 if no revisions exist.
- * @type int $count The total count of revisions for the given post.
- * }
- */
- function wp_get_latest_revision_id_and_total_count( $post = 0 ) {
- $post = get_post( $post );
- if ( ! $post ) {
- return new WP_Error( 'invalid_post', __( 'Invalid post.' ) );
- }
- if ( ! wp_revisions_enabled( $post ) ) {
- return new WP_Error( 'revisions_not_enabled', __( 'Revisions not enabled.' ) );
- }
- $args = array(
- 'post_parent' => $post->ID,
- 'fields' => 'ids',
- 'post_type' => 'revision',
- 'post_status' => 'inherit',
- 'order' => 'DESC',
- 'orderby' => 'date ID',
- 'posts_per_page' => 1,
- 'ignore_sticky_posts' => true,
- );
- $revision_query = new WP_Query();
- $revisions = $revision_query->query( $args );
- if ( ! $revisions ) {
- return array(
- 'latest_id' => 0,
- 'count' => 0,
- );
- }
- return array(
- 'latest_id' => $revisions[0],
- 'count' => $revision_query->found_posts,
- );
- }
- /**
- * Returns the url for viewing and potentially restoring revisions of a given post.
- *
- * @since 5.9.0
- *
- * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global `$post`.
- * @return string|null The URL for editing revisions on the given post, otherwise null.
- */
- function wp_get_post_revisions_url( $post = 0 ) {
- $post = get_post( $post );
- if ( ! $post instanceof WP_Post ) {
- return null;
- }
- // If the post is a revision, return early.
- if ( 'revision' === $post->post_type ) {
- return get_edit_post_link( $post );
- }
- if ( ! wp_revisions_enabled( $post ) ) {
- return null;
- }
- $revisions = wp_get_latest_revision_id_and_total_count( $post->ID );
- if ( is_wp_error( $revisions ) || 0 === $revisions['count'] ) {
- return null;
- }
- return get_edit_post_link( $revisions['latest_id'] );
- }
- /**
- * Determines whether revisions are enabled for a given post.
- *
- * @since 3.6.0
- *
- * @param WP_Post $post The post object.
- * @return bool True if number of revisions to keep isn't zero, false otherwise.
- */
- function wp_revisions_enabled( $post ) {
- return wp_revisions_to_keep( $post ) !== 0;
- }
- /**
- * Determines how many revisions to retain for a given post.
- *
- * By default, an infinite number of revisions are kept.
- *
- * The constant WP_POST_REVISIONS can be set in wp-config to specify the limit
- * of revisions to keep.
- *
- * @since 3.6.0
- *
- * @param WP_Post $post The post object.
- * @return int The number of revisions to keep.
- */
- function wp_revisions_to_keep( $post ) {
- $num = WP_POST_REVISIONS;
- if ( true === $num ) {
- $num = -1;
- } else {
- $num = (int) $num;
- }
- if ( ! post_type_supports( $post->post_type, 'revisions' ) ) {
- $num = 0;
- }
- /**
- * Filters the number of revisions to save for the given post.
- *
- * Overrides the value of WP_POST_REVISIONS.
- *
- * @since 3.6.0
- *
- * @param int $num Number of revisions to store.
- * @param WP_Post $post Post object.
- */
- $num = apply_filters( 'wp_revisions_to_keep', $num, $post );
- /**
- * Filters the number of revisions to save for the given post by its post type.
- *
- * Overrides both the value of WP_POST_REVISIONS and the {@see 'wp_revisions_to_keep'} filter.
- *
- * The dynamic portion of the hook name, `$post->post_type`, refers to
- * the post type slug.
- *
- * Possible hook names include:
- *
- * - `wp_post_revisions_to_keep`
- * - `wp_page_revisions_to_keep`
- *
- * @since 5.8.0
- *
- * @param int $num Number of revisions to store.
- * @param WP_Post $post Post object.
- */
- $num = apply_filters( "wp_{$post->post_type}_revisions_to_keep", $num, $post );
- return (int) $num;
- }
- /**
- * Sets up the post object for preview based on the post autosave.
- *
- * @since 2.7.0
- * @access private
- *
- * @param WP_Post $post
- * @return WP_Post|false
- */
- function _set_preview( $post ) {
- if ( ! is_object( $post ) ) {
- return $post;
- }
- $preview = wp_get_post_autosave( $post->ID );
- if ( is_object( $preview ) ) {
- $preview = sanitize_post( $preview );
- $post->post_content = $preview->post_content;
- $post->post_title = $preview->post_title;
- $post->post_excerpt = $preview->post_excerpt;
- }
- add_filter( 'get_the_terms', '_wp_preview_terms_filter', 10, 3 );
- add_filter( 'get_post_metadata', '_wp_preview_post_thumbnail_filter', 10, 3 );
- return $post;
- }
- /**
- * Filters the latest content for preview from the post autosave.
- *
- * @since 2.7.0
- * @access private
- */
- function _show_post_preview() {
- if ( isset( $_GET['preview_id'] ) && isset( $_GET['preview_nonce'] ) ) {
- $id = (int) $_GET['preview_id'];
- if ( false === wp_verify_nonce( $_GET['preview_nonce'], 'post_preview_' . $id ) ) {
- wp_die( __( 'Sorry, you are not allowed to preview drafts.' ), 403 );
- }
- add_filter( 'the_preview', '_set_preview' );
- }
- }
- /**
- * Filters terms lookup to set the post format.
- *
- * @since 3.6.0
- * @access private
- *
- * @param array $terms
- * @param int $post_id
- * @param string $taxonomy
- * @return array
- */
- function _wp_preview_terms_filter( $terms, $post_id, $taxonomy ) {
- $post = get_post();
- if ( ! $post ) {
- return $terms;
- }
- if ( empty( $_REQUEST['post_format'] ) || $post->ID != $post_id
- || 'post_format' !== $taxonomy || 'revision' === $post->post_type
- ) {
- return $terms;
- }
- if ( 'standard' === $_REQUEST['post_format'] ) {
- $terms = array();
- } else {
- $term = get_term_by( 'slug', 'post-format-' . sanitize_key( $_REQUEST['post_format'] ), 'post_format' );
- if ( $term ) {
- $terms = array( $term ); // Can only have one post format.
- }
- }
- return $terms;
- }
- /**
- * Filters post thumbnail lookup to set the post thumbnail.
- *
- * @since 4.6.0
- * @access private
- *
- * @param null|array|string $value The value to return - a single metadata value, or an array of values.
- * @param int $post_id Post ID.
- * @param string $meta_key Meta key.
- * @return null|array The default return value or the post thumbnail meta array.
- */
- function _wp_preview_post_thumbnail_filter( $value, $post_id, $meta_key ) {
- $post = get_post();
- if ( ! $post ) {
- return $value;
- }
- if ( empty( $_REQUEST['_thumbnail_id'] ) ||
- empty( $_REQUEST['preview_id'] ) ||
- $post->ID != $post_id ||
- '_thumbnail_id' !== $meta_key ||
- 'revision' === $post->post_type ||
- $post_id != $_REQUEST['preview_id'] ) {
- return $value;
- }
- $thumbnail_id = (int) $_REQUEST['_thumbnail_id'];
- if ( $thumbnail_id <= 0 ) {
- return '';
- }
- return (string) $thumbnail_id;
- }
- /**
- * Gets the post revision version.
- *
- * @since 3.6.0
- * @access private
- *
- * @param WP_Post $revision
- * @return int|false
- */
- function _wp_get_post_revision_version( $revision ) {
- if ( is_object( $revision ) ) {
- $revision = get_object_vars( $revision );
- } elseif ( ! is_array( $revision ) ) {
- return false;
- }
- if ( preg_match( '/^\d+-(?:autosave|revision)-v(\d+)$/', $revision['post_name'], $matches ) ) {
- return (int) $matches[1];
- }
- return 0;
- }
- /**
- * Upgrades the revisions author, adds the current post as a revision and sets the revisions version to 1.
- *
- * @since 3.6.0
- * @access private
- *
- * @global wpdb $wpdb WordPress database abstraction object.
- *
- * @param WP_Post $post Post object.
- * @param array $revisions Current revisions of the post.
- * @return bool true if the revisions were upgraded, false if problems.
- */
- function _wp_upgrade_revisions_of_post( $post, $revisions ) {
- global $wpdb;
- // Add post option exclusively.
- $lock = "revision-upgrade-{$post->ID}";
- $now = time();
- $result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` (`option_name`, `option_value`, `autoload`) VALUES (%s, %s, 'no') /* LOCK */", $lock, $now ) );
- if ( ! $result ) {
- // If we couldn't get a lock, see how old the previous lock is.
- $locked = get_option( $lock );
- if ( ! $locked ) {
- // Can't write to the lock, and can't read the lock.
- // Something broken has happened.
- return false;
- }
- if ( $locked > $now - 3600 ) {
- // Lock is not too old: some other process may be upgrading this post. Bail.
- return false;
- }
- // Lock is too old - update it (below) and continue.
- }
- // If we could get a lock, re-"add" the option to fire all the correct filters.
- update_option( $lock, $now );
- reset( $revisions );
- $add_last = true;
- do {
- $this_revision = current( $revisions );
- $prev_revision = next( $revisions );
- $this_revision_version = _wp_get_post_revision_version( $this_revision );
- // Something terrible happened.
- if ( false === $this_revision_version ) {
- continue;
- }
- // 1 is the latest revision version, so we're already up to date.
- // No need to add a copy of the post as latest revision.
- if ( 0 < $this_revision_version ) {
- $add_last = false;
- continue;
- }
- // Always update the revision version.
- $update = array(
- 'post_name' => preg_replace( '/^(\d+-(?:autosave|revision))[\d-]*$/', '$1-v1', $this_revision->post_name ),
- );
- /*
- * If this revision is the oldest revision of the post, i.e. no $prev_revision,
- * the correct post_author is probably $post->post_author, but that's only a good guess.
- * Update the revision version only and Leave the author as-is.
- */
- if ( $prev_revision ) {
- $prev_revision_version = _wp_get_post_revision_version( $prev_revision );
- // If the previous revision is already up to date, it no longer has the information we need :(
- if ( $prev_revision_version < 1 ) {
- $update['post_author'] = $prev_revision->post_author;
- }
- }
- // Upgrade this revision.
- $result = $wpdb->update( $wpdb->posts, $update, array( 'ID' => $this_revision->ID ) );
- if ( $result ) {
- wp_cache_delete( $this_revision->ID, 'posts' );
- }
- } while ( $prev_revision );
- delete_option( $lock );
- // Add a copy of the post as latest revision.
- if ( $add_last ) {
- wp_save_post_revision( $post->ID );
- }
- return true;
- }
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