add global to display_page function
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@ -10,7 +10,7 @@ class WikiTheme extends Themelet
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*/
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public function display_page(Page $page, WikiPage $wiki_page, ?WikiPage $nav_page=null)
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{
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global $user;
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global $config, $user;
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if (is_null($nav_page)) {
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$nav_page = new WikiPage();
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