Update README.md

[jirafeau.git] / lib / template / header.php
diff --git a/lib/template/header.php b/lib/template/header.php

index 275e3f0ea5e5e4bf2b1f0637fb5fae865e5cd0ca..3c2af8361df84aa4c32d9c7a10ada3499fe0078b 100644 (file)
--- a/lib/template/header.php
+++ b/lib/template/header.php
@@ -3,7 +3,8 @@ header('Vary: Accept');
  
  $content_type = 'text/html; charset=utf-8';
  
-if (stristr ($_SERVER['HTTP_ACCEPT'], 'application/xhtml+xml'))
+if (isset ($_SERVER['HTTP_ACCEPT']) &&
+    stristr ($_SERVER['HTTP_ACCEPT'], 'application/xhtml+xml'))
      $content_type = 'application/xhtml+xml; charset=utf-8';
  
  header('Content-Type: ' . $content_type);
@@ -25,7 +26,8 @@ if (!isset ($cfg['style']))
  else
      $style = $cfg['style'];
  
-if (stristr ($_SERVER['HTTP_ACCEPT'], 'application/xhtml+xml'))
+if (isset ($_SERVER['HTTP_ACCEPT']) &&
+    stristr ($_SERVER['HTTP_ACCEPT'], 'application/xhtml+xml'))
  {
  ?>
  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">