Ticket #47466: 47466.2.diff

src/wp-admin/includes/misc.php

@@ -79 +79 @@
                         $state = false;
                 }
                 if ( $state ) {
+                        if ( '#' === substr( $markerline, 0, 1 ) ) {
+                                continue;
+                        }
                         $result[] = $markerline;
                 }
                 if ( false !== strpos( $markerline, '# BEGIN ' . $marker ) ) {
@@ -119 +122 @@
                 $insertion = explode( "\n", $insertion );
         }
 
+        $instructions = sprintf(
+                /* translators: 1: marker */
+                __( 'The directives (lines) between `BEGIN %1$s` and `END %1$s` are
+dynamically generated, and should only be modified through WordPress filters.
+Any changes to the directives between these markers will be overwritten.' ),
+                $marker
+        );
+
+        $instructions = explode( "\n", $instructions );
+        foreach ( $instructions as $line => $text ) {
+                $instructions[ $line ] = '# ' . $text;
+        }
+
+        /**
+         * Filters the inline instructions inserted before the dynamically generated content.
+         *
+         * @since 5.3.0
+         *
+         * @param string[] $instructions Array of lines with inline instructions.
+         * @param string   $marker       The marker being inserted.
+         */
+        $instructions = apply_filters( 'insert_with_markers_inline_instructions', $instructions, $marker );
+
+        $insertion = array_merge( $instructions, $insertion );
+
         $start_marker = "# BEGIN {$marker}";
         $end_marker   = "# END {$marker}";