X-Git-Url: https://scripts.mit.edu/gitweb/autoinstallsdev/wordpress.git/blobdiff_plain/fd1685fbc29cf422e0d23f1bf1815bc023be805d..58f607a1de715c9bca69340a4d6fb9e1b9c2bed2:/wp-includes/vars.php

diff --git a/wp-includes/vars.php b/wp-includes/vars.php
index b66b3131..7a62c892 100644
--- a/wp-includes/vars.php
+++ b/wp-includes/vars.php
@@ -37,25 +37,27 @@ if ( is_admin() ) {
 // Simple browser detection
 $is_lynx = $is_gecko = $is_winIE = $is_macIE = $is_opera = $is_NS4 = $is_safari = $is_chrome = $is_iphone = false;
 
-if (strpos($_SERVER['HTTP_USER_AGENT'], 'Lynx') !== false) {
-	$is_lynx = true;
-} elseif ( strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'chrome') !== false ) {
-	$is_chrome = true;
-} elseif ( strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'safari') !== false ) {
-	$is_safari = true;
-} elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'Gecko') !== false) {
-	$is_gecko = true;
-} elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Win') !== false) {
-	$is_winIE = true;
-} elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mac') !== false) {
-	$is_macIE = true;
-} elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'Opera') !== false) {
-	$is_opera = true;
-} elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'Nav') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mozilla/4.') !== false) {
-	$is_NS4 = true;
+if ( isset($_SERVER['HTTP_USER_AGENT']) ) {
+	if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Lynx') !== false ) {
+		$is_lynx = true;
+	} elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'chrome') !== false ) {
+		$is_chrome = true;
+	} elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'safari') !== false ) {
+		$is_safari = true;
+	} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Gecko') !== false ) {
+		$is_gecko = true;
+	} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Win') !== false ) {
+		$is_winIE = true;
+	} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mac') !== false ) {
+		$is_macIE = true;
+	} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Opera') !== false ) {
+		$is_opera = true;
+	} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Nav') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mozilla/4.') !== false ) {
+		$is_NS4 = true;
+	}
 }
 
-if ( $is_safari && strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'mobile') !== false )
+if ( $is_safari && stripos($_SERVER['HTTP_USER_AGENT'], 'mobile') !== false )
 	$is_iphone = true;
 
 $is_IE = ( $is_macIE || $is_winIE );