diff -r 34716fd837a4 -r be944660c56a wp/wp-includes/revision.php
--- a/wp/wp-includes/revision.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-includes/revision.php	Wed Sep 21 18:19:35 2022 +0200
@@ -227,6 +227,8 @@
  *
  * @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.
@@ -329,7 +331,7 @@
 	$post = _wp_post_revision_data( $post, $autosave );
 	$post = wp_slash( $post ); // Since data is from DB.
 
-	$revision_id = wp_insert_post( $post );
+	$revision_id = wp_insert_post( $post, true );
 	if ( is_wp_error( $revision_id ) ) {
 		return $revision_id;
 	}
@@ -369,12 +371,12 @@
 		return null;
 	}
 
-	if ( OBJECT == $output ) {
+	if ( OBJECT === $output ) {
 		return $revision;
-	} elseif ( ARRAY_A == $output ) {
+	} elseif ( ARRAY_A === $output ) {
 		$_revision = get_object_vars( $revision );
 		return $_revision;
-	} elseif ( ARRAY_N == $output ) {
+	} elseif ( ARRAY_N === $output ) {
 		$_revision = array_values( get_object_vars( $revision ) );
 		return $_revision;
 	}
@@ -545,7 +547,7 @@
 	if ( true === $num ) {
 		$num = -1;
 	} else {
-		$num = intval( $num );
+		$num = (int) $num;
 	}
 
 	if ( ! post_type_supports( $post->post_type, 'revisions' ) ) {
@@ -562,7 +564,24 @@
 	 * @param int     $num  Number of revisions to store.
 	 * @param WP_Post $post Post object.
 	 */
-	return (int) apply_filters( 'wp_revisions_to_keep', $num, $post );
+	$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.
+	 *
+	 * @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;
 }
 
 /**
@@ -676,12 +695,12 @@
 		return $value;
 	}
 
-	$thumbnail_id = intval( $_REQUEST['_thumbnail_id'] );
+	$thumbnail_id = (int) $_REQUEST['_thumbnail_id'];
 	if ( $thumbnail_id <= 0 ) {
 		return '';
 	}
 
-	return strval( $thumbnail_id );
+	return (string) $thumbnail_id;
 }
 
 /**