1<?php
2/**
3 * Revisions administration panel
4 *
5 * Requires wp-admin/includes/revision.php.
6 *
7 * @package WordPress
8 * @subpackage Administration
9 * @since 2.6.0
10 */
11
12/** WordPress Administration Bootstrap */
13require_once __DIR__ . '/admin.php';
14
15require ABSPATH . 'wp-admin/includes/revision.php';
16
17/**
18 * @global int $revision_id Optional. The revision ID.
19 * @global string $action The action to take. Accepts 'restore', 'view', or 'edit'.
20 * @global int $from The revision to compare from.
21 * @global int $to Optional, required if revision missing. The revision to compare to.
22 */
23
24$revision_id = ! empty( $_REQUEST['revision'] ) ? absint( $_REQUEST['revision'] ) : 0;
25$action = ! empty( $_REQUEST['action'] ) ? sanitize_text_field( $_REQUEST['action'] ) : '';
26$from = ! empty( $_REQUEST['from'] ) && is_numeric( $_REQUEST['from'] ) ? absint( $_REQUEST['from'] ) : null;
27$to = ! empty( $_REQUEST['to'] ) && is_numeric( $_REQUEST['to'] ) ? absint( $_REQUEST['to'] ) : null;
28
29if ( ! $revision_id ) {
30 $revision_id = $to;
31}
32
33$redirect = 'edit.php';
34
35switch ( $action ) {
36 case 'restore':
37 $revision = wp_get_post_revision( $revision_id );
38 if ( ! $revision ) {
39 break;
40 }
41
42 if ( ! current_user_can( 'edit_post', $revision->post_parent ) ) {
43 break;
44 }
45
46 $post = get_post( $revision->post_parent );
47 if ( ! $post ) {
48 break;
49 }
50
51 // Don't restore if revisions are disabled and this is not an autosave.
52 if ( ! wp_revisions_enabled( $post ) && ! wp_is_post_autosave( $revision ) ) {
53 $redirect = 'edit.php?post_type=' . $post->post_type;
54 break;
55 }
56
57 // Don't restore if the post is locked.
58 if ( wp_check_post_lock( $post->ID ) ) {
59 break;
60 }
61
62 check_admin_referer( "restore-post_{$revision->ID}" );
63
64 /*
65 * Ensure the global $post remains the same after revision is restored.
66 * Because wp_insert_post() and wp_transition_post_status() are called
67 * during the process, plugins can unexpectedly modify $post.
68 */
69 $backup_global_post = clone $post;
70
71 wp_restore_post_revision( $revision->ID );
72
73 // Restore the global $post as it was before.
74 $post = $backup_global_post;
75
76 $redirect = add_query_arg(
77 array(
78 'message' => 5,
79 'revision' => $revision->ID,
80 ),
81 get_edit_post_link( $post->ID, 'url' )
82 );
83 break;
84 case 'view':
85 case 'edit':
86 default:
87 $revision = wp_get_post_revision( $revision_id );
88 if ( ! $revision ) {
89 break;
90 }
91
92 $post = get_post( $revision->post_parent );
93 if ( ! $post ) {
94 break;
95 }
96
97 if ( ! current_user_can( 'read_post', $revision->ID ) || ! current_user_can( 'edit_post', $revision->post_parent ) ) {
98 break;
99 }
100
101 // Bail if revisions are disabled and this is not an autosave.
102 if ( ! wp_revisions_enabled( $post ) && ! wp_is_post_autosave( $revision ) ) {
103 $redirect = 'edit.php?post_type=' . $post->post_type;
104 break;
105 }
106
107 $post_edit_link = get_edit_post_link();
108 $post_title = '<a href="' . esc_url( $post_edit_link ) . '">' . _draft_or_post_title() . '</a>';
109 /* translators: %s: Post title. */
110 $h1 = sprintf( __( 'Compare Revisions of “%s”' ), $post_title );
111 $return_to_post = '<a href="' . esc_url( $post_edit_link ) . '">' . __( '← Go to editor' ) . '</a>';
112 // Used in the HTML title tag.
113 $title = __( 'Revisions' );
114
115 $redirect = false;
116 break;
117}
118
119// Empty post_type means either malformed object found, or no valid parent was found.
120if ( ! $redirect && empty( $post->post_type ) ) {
121 $redirect = 'edit.php';
122}
123
124if ( ! empty( $redirect ) ) {
125 wp_redirect( $redirect );
126 exit;
127}
128
129// This is so that the correct "Edit" menu item is selected.
130if ( ! empty( $post->post_type ) && 'post' !== $post->post_type ) {
131 $parent_file = 'edit.php?post_type=' . $post->post_type;
132} else {
133 $parent_file = 'edit.php';
134}
135$submenu_file = $parent_file;
136
137wp_enqueue_script( 'revisions' );
138wp_localize_script( 'revisions', '_wpRevisionsSettings', wp_prepare_revisions_for_js( $post, $revision_id, $from ) );
139
140/* Revisions Help Tab */
141
142$revisions_overview = '<p>' . __( 'This screen is used for managing your content revisions.' ) . '</p>';
143$revisions_overview .= '<p>' . __( 'Revisions are saved copies of your post or page, which are periodically created as you update your content. The red text on the left shows the content that was removed. The green text on the right shows the content that was added.' ) . '</p>';
144$revisions_overview .= '<p>' . __( 'From this screen you can review, compare, and restore revisions:' ) . '</p>';
145$revisions_overview .= '<ul><li>' . __( 'To navigate between revisions, <strong>drag the slider handle left or right</strong> or <strong>use the Previous or Next buttons</strong>.' ) . '</li>';
146$revisions_overview .= '<li>' . __( 'Compare two different revisions by <strong>selecting the “Compare any two revisions” box</strong> to the side.' ) . '</li>';
147$revisions_overview .= '<li>' . __( 'To restore a revision, <strong>click Restore This Revision</strong>.' ) . '</li></ul>';
148
149get_current_screen()->add_help_tab(
150 array(
151 'id' => 'revisions-overview',
152 'title' => __( 'Overview' ),
153 'content' => $revisions_overview,
154 )
155);
156
157$revisions_sidebar = '<p><strong>' . __( 'For more information:' ) . '</strong></p>';
158$revisions_sidebar .= '<p>' . __( '<a href="https://wordpress.org/documentation/article/revisions/">Revisions Management</a>' ) . '</p>';
159$revisions_sidebar .= '<p>' . __( '<a href="https://wordpress.org/support/forums/">Support forums</a>' ) . '</p>';
160
161get_current_screen()->set_help_sidebar( $revisions_sidebar );
162
163require_once ABSPATH . 'wp-admin/admin-header.php';
164
165?>
166
167<div class="wrap">
168 <h1 class="long-header"><?php echo $h1; ?></h1>
169 <?php echo $return_to_post; ?>
170</div>
171<?php
172wp_print_revision_templates();
173
174require_once ABSPATH . 'wp-admin/admin-footer.php';
175