* for the browser to set which one is currently being used.
*
* Detects which user environment WordPress is being used on.
- * Only attempts to check for Apache and IIS. Two web servers
- * with known permalink capability.
+ * Only attempts to check for Apache, Nginx and IIS -- three web
+ * servers with known pretty permalink capability.
+ *
+ * Note: Though Nginx is detected, WordPress does not currently
+ * generate rewrite rules for it. See https://codex.wordpress.org/Nginx
*
* @package WordPress
*/
global $pagenow,
- $is_lynx, $is_gecko, $is_winIE, $is_macIE, $is_opera, $is_NS4, $is_safari, $is_chrome, $is_iphone, $is_IE,
- $is_apache, $is_IIS, $is_iis7;
+ $is_lynx, $is_gecko, $is_winIE, $is_macIE, $is_opera, $is_NS4, $is_safari, $is_chrome, $is_iphone, $is_IE, $is_edge,
+ $is_apache, $is_IIS, $is_iis7, $is_nginx;
// On which page are we ?
if ( is_admin() ) {
unset($self_matches);
// Simple browser detection
-$is_lynx = $is_gecko = $is_winIE = $is_macIE = $is_opera = $is_NS4 = $is_safari = $is_chrome = $is_iphone = false;
+$is_lynx = $is_gecko = $is_winIE = $is_macIE = $is_opera = $is_NS4 = $is_safari = $is_chrome = $is_iphone = $is_edge = false;
if ( isset($_SERVER['HTTP_USER_AGENT']) ) {
if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Lynx') !== false ) {
$is_lynx = true;
+ } elseif ( strpos( $_SERVER['HTTP_USER_AGENT'], 'Edge' ) !== false ) {
+ $is_edge = true;
} elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'chrome') !== false ) {
if ( stripos( $_SERVER['HTTP_USER_AGENT'], 'chromeframe' ) !== false ) {
$is_admin = is_admin();
/**
- * Filter whether Google Chrome Frame should be used, if available.
+ * Filters whether Google Chrome Frame should be used, if available.
*
* @since 3.2.0
*
/**
* Test if the current browser runs on a mobile device (smart phone, tablet, etc.)
*
- * @return bool true|false
+ * @return bool
*/
function wp_is_mobile() {
- static $is_mobile;
-
- if ( isset($is_mobile) )
- return $is_mobile;
-
if ( empty($_SERVER['HTTP_USER_AGENT']) ) {
$is_mobile = false;
} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Mobile') !== false // many mobile devices (all iPhone, iPad, etc.)