From e537f7cddfcd368a33c35375f91623a3dfda70c9 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov@git.wordpress.org>
Date: Sat, 26 Feb 2022 14:26:21 +0000
Subject: [PATCH] Query: Preinitialize the `WP` class properties to their
 default values.

This avoids an `array_keys() expects parameter 1 to be array, null given` PHP warning for the `query_vars` property in `WP::build_query_string()` when disabling request parsing via the `do_parse_request` filter.

Props dd32, SergeyBiryukov.
Fixes #55222.

git-svn-id: https://develop.svn.wordpress.org/trunk@52804 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/class-wp.php | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/wp-includes/class-wp.php b/src/wp-includes/class-wp.php
index 770df083e7..6eb6177c09 100644
--- a/src/wp-includes/class-wp.php
+++ b/src/wp-includes/class-wp.php
@@ -40,7 +40,7 @@ class WP {
 	 * @since 2.0.0
 	 * @var array
 	 */
-	public $query_vars;
+	public $query_vars = array();
 
 	/**
 	 * String parsed to set the query variables.
@@ -48,7 +48,7 @@ class WP {
 	 * @since 2.0.0
 	 * @var string
 	 */
-	public $query_string;
+	public $query_string = '';
 
 	/**
 	 * The request path, e.g. 2015/05/06.
@@ -56,7 +56,7 @@ class WP {
 	 * @since 2.0.0
 	 * @var string
 	 */
-	public $request;
+	public $request = '';
 
 	/**
 	 * Rewrite rule the request matched.
@@ -64,7 +64,7 @@ class WP {
 	 * @since 2.0.0
 	 * @var string
 	 */
-	public $matched_rule;
+	public $matched_rule = '';
 
 	/**
 	 * Rewrite query the request matched.
@@ -72,7 +72,7 @@ class WP {
 	 * @since 2.0.0
 	 * @var string
 	 */
-	public $matched_query;
+	public $matched_query = '';
 
 	/**
 	 * Whether already did the permalink.