Ticket #23049: template.diff

template.php

@@ -64 +64 @@
 /**
  * Retrieve path of 404 template in current or parent template.
  *
+ * Will attempt to retrieve templates specific to the query vars that are
+ * present in the URL returning a 404 error. For example, if the tag query
+ * var is set, 404-tag.php and 404-archive.php will be returned in addition
+ * to the default 404.php.
+ *
+ * Works by looping through the '$checks' array and checking to see if each 
+ * query var is set. If one is, the template slugs for that query var will be 
+ * looped through to build the template filenames.
+ *
  * The template path is filterable via the dynamic {@see '$type_template'} hook,
  * e.g. '404_template'.
  *
@@ -74 +83 @@
  * @return string Full path to 404 template file.
  */
 function get_404_template() {
-        return get_query_template('404');
+        
+        $checks = array(
+                'taxonomy'      => array( 'taxonomy-%s', 'taxonomy', 'archive' ),
+                'attachment'    => array( 'attachment', 'single', 'singular' ),
+                'attachment_id' => array( 'attachment', 'single', 'singular' ),
+                'post_type'     => array( 'single-%s', 'single', 'singular' ),
+                'p'             => array( 'single', 'singular' ),
+                'name'          => array( 'single', 'singular' ),
+                'page_id'       => array( 'page', 'singular' ),
+                'cat'           => array( 'category', 'archive' ),
+                'category_name' => array( 'category', 'archive' ),
+                'tag'           => array( 'tag', 'archive' ),
+                'author'        => array( 'author', 'archive' ),
+                'm'             => array( 'date', 'archive' ),
+                'year'          => array( 'date', 'archive' ),
+                'monthnum'      => array( 'date', 'archive' ),
+                'day'           => array( 'date', 'archive' ),
+        );
+        
+        $templates = array();
+        
+        foreach ( $checks as $query_var => $template_slugs ) {
+                if ( $query_var = get_query_var( $query_var ) ) {
+                        foreach ( $template_slugs as $template_slug ) {
+                                $templates[] = '404-' . sprintf( $template_slug, $query_var ) . '.php';
+                        }
+                        break;
+                }
+        }
+        
+        $templates[] = '404.php';
+        
+        return get_query_template( '404', $templates );
 }
 
 /**