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-rw-r--r--lib/htmloutputter.php4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/htmloutputter.php b/lib/htmloutputter.php
index 99f956545..64be745be 100644
--- a/lib/htmloutputter.php
+++ b/lib/htmloutputter.php
@@ -109,8 +109,8 @@ class HTMLOutputter extends XMLOutputter
header('Content-Type: '.$type.'; charset=UTF-8');
$this->extraHeaders();
- if( ! substr($type,0,strlen('text/html'))=='text/html' ){
- // Browsers don't like it when <?xml it output for non-xhtml documents
+ if (preg_match("/.*\/.*xml/", $type)) {
+ // Required for XML documents
$this->xw->startDocument('1.0', 'UTF-8');
}
$this->xw->writeDTD('html',