Ticket #17447: register-post-type-args-filter.17447.v2.diff

src/wp-includes/post.php

@@ -1201 +1201 @@
         if ( ! is_array( $wp_post_types ) )
                 $wp_post_types = array();
 
+        // Sanitize post type name
+        $post_type = sanitize_key( $post_type );
+        
         // Args prefixed with an underscore are reserved for internal use.
         $defaults = array(
                 'labels'               => array(),
@@ -1230 +1233 @@
                 '_edit_link'           => 'post.php?post=%d',
         );
         $args = wp_parse_args( $args, $defaults );
-        $args = (object) $args;
 
-        $post_type = sanitize_key( $post_type );
+        if ( false == $args['_builtin'] ) {
+                $args = apply_filters( 'register_post_type_args', $args, $post_type );
+        }
+
+        $args = (object) $args;
         $args->name = $post_type;
 
         if ( strlen( $post_type ) > 20 )