Ticket #16282: 16282.diff

wp-includes/taxonomy.php

@@ -877 +877 @@
         if ( ! taxonomy_exists($taxonomy) )
                 return false;
 
-        if ( 'slug' == $field ) {
+        if ( '_slug' == $field ) {
                 $field = 't.slug';
-                $value = sanitize_title($value);
                 if ( empty($value) )
                         return false;
+
+        } else if ( 'slug' == $field ) {
+                $san_title = sanitize_title($value);
+                $san_title_query = sanitize_title_for_query($value);
+                $term = get_term_by('_slug', $san_title, $taxonomy, $output, $filter);
+                if ( empty($term) && $san_title != $san_title_query )
+                        $term = get_term_by('_slug', $san_title_query, $taxonomy, $output, $filter);
+                return $term;
+
         } else if ( 'name' == $field ) {
                 // Assume already escaped
                 $value = stripslashes($value);
                 $field = 't.name';
+
         } else {
                 return get_term( (int) $value, $taxonomy, $output, $filter);
         }