Ticket #35286: 35286.diff

src/wp-admin/network/themes.php

@@ -287 +287 @@
 $wp_list_table->views();
 
 if ( 'broken' == $status )
-        echo '<p class="clear">' . __('The following themes are installed but incomplete. Themes must have a stylesheet and a template.') . '</p>';
+        echo '<p class="clear">' . __( 'The following themes are installed but incomplete.' ) . '</p>';
 ?>
 
 <form method="post">

src/wp-admin/themes.php

@@ -295 +295 @@
 
 <div class="broken-themes">
 <h3><?php _e('Broken Themes'); ?></h3>
-<p><?php _e('The following themes are installed but incomplete. Themes must have a stylesheet and a template.'); ?></p>
+<p><?php _e( 'The following themes are installed but incomplete.' ); ?></p>
 
 <?php
 $can_delete = current_user_can( 'delete_themes' );

src/wp-includes/class-wp-theme.php

@@ -268 +268 @@
                 if ( ! $this->template && ! ( $this->template = $this->headers['Template'] ) ) {
                         $this->template = $this->stylesheet;
                         if ( ! file_exists( $this->theme_root . '/' . $this->stylesheet . '/index.php' ) ) {
-                                $this->errors = new WP_Error( 'theme_no_index', __( 'Template is missing.' ) );
+                                $error_message = sprintf(
+                                        __( 'Template is missing. Standalone themes need to have a %1$s template file. <a href="%2$s">Child themes</a> need to have a Template header in the %3$s stylesheet.' ),
+                                        '<code>index.php</code>',
+                                        __( 'https://codex.wordpress.org/Child_Themes' ),
+                                        '<code>style.css</code>'
+                                );
+                                $this->errors = new WP_Error( 'theme_no_index', $error_message );
                                 $this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
                                 return;
                         }