Ticket #28745: wxr_export_skip_commentmeta.patch

wp-admin/includes/export.php

@@ -468 +468 @@
                         <wp:comment_parent><?php echo $c->comment_parent; ?></wp:comment_parent>
                         <wp:comment_user_id><?php echo $c->user_id; ?></wp:comment_user_id>
 <?php           $c_meta = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->commentmeta WHERE comment_id = %d", $c->comment_ID ) );
-                        foreach ( $c_meta as $meta ) : ?>
+                        foreach ( $c_meta as $meta ) :
+                                /**
+                                 * Filter whether to selectively skip comment meta used for WXR exports.
+                                 *
+                                 * Returning a truthy value to the filter will skip the current meta
+                                 * object from being exported.
+                                 *
+                                 * @param bool   $skip     Whether to skip the current comment meta. Default false.
+                                 * @param string $meta_key Current meta key.
+                                 * @param object $meta     Current meta object.
+                                 */
+                                if ( apply_filters( 'wxr_export_skip_commentmeta', false, $meta->meta_key, $meta ) ) {
+                                        continue;
+                                }
+                        ?>
                         <wp:commentmeta>
                                 <wp:meta_key><?php echo $meta->meta_key; ?></wp:meta_key>
                                 <wp:meta_value><?php echo wxr_cdata( $meta->meta_value ); ?></wp:meta_value>