+$is_iis7 = $is_IIS && intval( substr( $_SERVER['SERVER_SOFTWARE'], strpos( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/' ) + 14 ) ) >= 7;
+
+/**
+ * Test if the current browser runs on a mobile device (smart phone, tablet, etc.)
+ *
+ * @return bool
+ */
+function wp_is_mobile() {
+ if ( empty($_SERVER['HTTP_USER_AGENT']) ) {
+ $is_mobile = false;
+ } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Mobile') !== false // many mobile devices (all iPhone, iPad, etc.)
+ || strpos($_SERVER['HTTP_USER_AGENT'], 'Android') !== false
+ || strpos($_SERVER['HTTP_USER_AGENT'], 'Silk/') !== false
+ || strpos($_SERVER['HTTP_USER_AGENT'], 'Kindle') !== false
+ || strpos($_SERVER['HTTP_USER_AGENT'], 'BlackBerry') !== false
+ || strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mini') !== false
+ || strpos($_SERVER['HTTP_USER_AGENT'], 'Opera Mobi') !== false ) {
+ $is_mobile = true;
+ } else {
+ $is_mobile = false;
+ }