X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/5aa86a9053fb0fa15846bb60aac2fb8fdfff524a..refs/tags/wordpress-3.4:/wp-includes/vars.php

diff --git a/wp-includes/vars.php b/wp-includes/vars.php
index 3b824a95..7585793d 100644
--- a/wp-includes/vars.php
+++ b/wp-includes/vars.php
@@ -98,4 +98,29 @@ $is_IIS = !$is_apache && (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !
  */
 $is_iis7 = $is_IIS && (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/7.') !== false);
 
-?>
+/**
+ * Test if the current browser runs on a mobile device (smart phone, tablet, etc.)
+ *
+ * @return bool true|false
+ */
+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.)
+		|| 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 ) {
+			$is_mobile = true;
+	} else {
+		$is_mobile = false;
+	}
+
+	return $is_mobile;
+}