wp_parse_str_undifeied_vars.patch on Ticket #39048 – Attachment – WordPress Trac

src/wp-includes/functions.php

                 $base = '';
                 $query = $uri;
+        }
+        $qs = array();
         wp_parse_str( $query, $qs );
         $qs = urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string
         if ( is_array( $args[0] ) ) {
 …
  * @return bool True if yes, false on anything else.
  */
 function bool_from_yn( $yn ) {
         return ( strtolower( $yn ) == 'y' );
+        return ( 'y' === strtolower( $yn ) );
+}
 /**
 …
  * Load the feed template from the use of an action hook.
+ *
  * If the feed action does not have a hook, then the function will die with a
- * message telling the visitor that the feed is not valid.
+ *
  * It is better to only have one hook for each feed.
+ *
 …
         elseif ( is_array( $args ) )
                 $r =& $args;
         else
+                $r = array();
                 wp_parse_str( $args, $r );
         if ( is_array( $defaults ) )

                 // Find the format argument.
                 $format = explode( '?', str_replace( '%_%', $args['format'], $args['base'] ) );
                 $format_query = isset( $format[1] ) ? $format[1] : '';
+                $format_args = array();
                 wp_parse_str( $format_query, $format_args );
                 // Find the query args of the requested URL.
+                $url_query_args = array();
                 wp_parse_str( $url_parts[1], $url_query_args );
                 // Remove the format argument from the array of query arguments, to avoid overwriting custom format.

                 $parsed = parse_url( $src );
                 if ( isset($parsed['query']) && $parsed['query'] ) {
+                        $qv = array();
                         wp_parse_str( $parsed['query'], $qv );
                         $url = add_query_arg( $qv, $url );
+                }

         function test_wp_parse_args_other() {
                 $b = true;
+                $s = array();
                 wp_parse_str($b, $s);
                 $this->assertEquals($s, wp_parse_args($b));
                 $q = 'x=5&_baba=dudu&';
+                $ss = array();
                 wp_parse_str($q, $ss);
                 $this->assertEquals($ss, wp_parse_args($q));
+        }