wp-admin/includes/post.php:1790Outputs the HTML for the notice to say that someone else is editing or has taken over editing of this post.
4 hooks fire while _admin_notice_post_locked() runs, in this order:
Filters whether to show the post locked dialog.
Filters whether to allow the post lock to be overridden.
Fires inside the post locked dialog before the buttons are displayed.
Fires inside the dialog displayed when a user has lost the post lock.
function _admin_notice_post_locked() { $post = get_post(); if ( ! $post ) { return; } $user = null; $user_id = wp_check_post_lock( $post->ID ); if ( $user_id ) { $user = get_userdata( $user_id ); } if ( $user ) { /** * Filters whether to show the post locked dialog. * * Returning false from the filter will prevent the dialog from being displayed. * * @since 3.6.0 * * @param bool $display Whether to display the dialog. Default true. * @param WP_Post $post Post object. * @param WP_User $user The user with the lock for the post. */ if ( ! apply_filters( 'show_post_locked_dialog', true, $post, $user ) ) { return; } $locked = true; } else { $locked = false; } $sendback = wp_get_referer(); $sendback_text = __( 'Go back' ); if ( ! $locked || ! $sendback || str_contains( $sendback, 'post.php' ) || str_contains( $sendback, 'post-new.php' ) ) { $sendback = admin_url( 'edit.php' ); if ( 'post' !== $post->post_type ) { $sendback = add_query_arg( 'post_type', $post->post_type, $sendback ); } $post_type_object = get_post_type_object( $post->post_type ); if ( $post_type_object ) { $sendback_text = $post_type_object->labels->all_items; } } $hidden = $locked ? '' : ' hidden'; ?> <div id="post-lock-dialog" class="notification-dialog-wrap<?php echo $hidden; ?>"> <div class="notification-dialog-background"></div> <div class="notification-dialog"> <?php if ( $locked ) { $query_args = array(); if ( get_post_type_object( $post->post_type )->public ) { if ( 'publish' === $post->post_status || $user->ID !== (int) $post->post_author ) { // Latest content is in autosave. $nonce = wp_create_nonce( 'post_preview_' . $post->ID ); $query_args['preview_id'] = $post->ID; $query_args['preview_nonce'] = $nonce; } } $preview_link = get_preview_post_link( $post->ID, $query_args ); /** * Filters whether to allow the post lock to be overridden. * * Returning false from the filter will disable the ability * to override the post lock. * * @since 3.6.0Introduced in 2.8.5. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/post.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.