From 4eab8aab82d1d6e75a875d3ae7e8198efbbcee6b Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov@git.wordpress.org>
Date: Tue, 14 Jun 2016 15:33:06 +0000
Subject: [PATCH] Users: `wp_signon()` expects an array as the `$credentials`
 argument, not a string.

If an empty string was passed, redeclare it as an empty array to avoid a warning and a fatal error in PHP 7.1.0 Alpha 1.

Props simonvik.
Fixes #37071.

git-svn-id: https://develop.svn.wordpress.org/trunk@37697 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/user.php | 2 ++
 src/wp-login.php         | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/wp-includes/user.php b/src/wp-includes/user.php
index aa225a6718..0bfc9e5fc4 100644
--- a/src/wp-includes/user.php
+++ b/src/wp-includes/user.php
@@ -27,6 +27,8 @@
  */
 function wp_signon( $credentials = array(), $secure_cookie = '' ) {
 	if ( empty($credentials) ) {
+		$credentials = array(); // Back-compat for plugins passing an empty string.
+
 		if ( ! empty($_POST['log']) )
 			$credentials['user_login'] = $_POST['log'];
 		if ( ! empty($_POST['pwd']) )
diff --git a/src/wp-login.php b/src/wp-login.php
index 9a8a059c5e..46f1507d85 100644
--- a/src/wp-login.php
+++ b/src/wp-login.php
@@ -790,7 +790,7 @@ default:
 
 	$reauth = empty($_REQUEST['reauth']) ? false : true;
 
-	$user = wp_signon( '', $secure_cookie );
+	$user = wp_signon( array(), $secure_cookie );
 
 	if ( empty( $_COOKIE[ LOGGED_IN_COOKIE ] ) ) {
 		if ( headers_sent() ) {