WordPress 4.3-scripts

[autoinstalls/wordpress.git] / wp-includes / vars.php

diff --git a/wp-includes/vars.php b/wp-includes/vars.php
index 996d17383007a05de96a777a43d588a4d1b90ae8..828fbbb4ab3c279737154d2f56246ea2144ad568 100644 (file)
--- a/wp-includes/vars.php
+++ b/wp-includes/vars.php
@@ -10,7 +10,7 @@
  * servers with known pretty permalink capability.
  *
  * Note: Though Nginx is detected, WordPress does not currently
- * generate rewrite rules for it. See http://codex.wordpress.org/Nginx
+ * generate rewrite rules for it. See https://codex.wordpress.org/Nginx
  *
  * @package WordPress
  */
@@ -118,13 +118,16 @@ $is_iis7 = $is_IIS && intval( substr( $_SERVER['SERVER_SOFTWARE'], strpos( $_SER
 /**
  * Test if the current browser runs on a mobile device (smart phone, tablet, etc.)
  *
- * @return bool true|false
+ * @staticvar bool $is_mobile
+ *
+ * @return bool
  */
 function wp_is_mobile() {
-       static $is_mobile;
+       static $is_mobile = null;
 
-       if ( isset($is_mobile) )
+       if ( isset( $is_mobile ) ) {
                return $is_mobile;
+       }
 
        if ( empty($_SERVER['HTTP_USER_AGENT']) ) {
                $is_mobile = false;