---json
{
    "layout": "median",
    "page_id": "1opeml2235tep1x1ivccw"
}
---
====== Fatal Error - Class 'SimpleXMLElement' not found ======


===== About =====
Until [[release:release#1.12|version 1.12]], ''Combostrap'' mades use of the [[https://www.php.net/manual/en/simplexml.installation.php|SimpleXml]] library to manipulate SVG and HTML code 

This library is installed by default and is therefore part of most of the installation.

If you don't have it, you may got the following error and this article is a step by step on how to resolve it.


===== Steps =====
==== PHP Fatal error:  Uncaught Error: Class 'SimpleXMLElement' not found ====
The error that you will see in your log.
<console warning>
PHP Fatal error:  Uncaught Error: Class 'SimpleXMLElement' not found in /usr/share/dokuwiki/lib/plugins/combo/class/XmlUtility.php:110
Stack trace:
#0 /usr/share/dokuwiki/lib/plugins/combo/class/LinkUtility.php(228): ComboStrap\\XmlUtility::isXml('<a href="https:...')
#1 /usr/share/dokuwiki/lib/plugins/combo/syntax/link.php(161): ComboStrap\\LinkUtility->render(Object(Doku_Renderer_xhtml))
#2 /usr/share/dokuwiki/inc/parser/renderer.php(117): syntax_plugin_combo_link->render('xhtml', Object(Doku_Renderer_xhtml), Array)
#3 /usr/share/dokuwiki/inc/parserutils.php(673): Doku_Renderer->plugin('combo_link', Array, 5, '[[https://www.r...')
#4 /usr/share/dokuwiki/inc/parserutils.php(142): p_render('xhtml', Array, NULL)
#5 /usr/share/dokuwiki/inc/parserutils.php(89): p_cached_output('/var/lib/dokuwi...', 'xhtml', 'index')
#6 /usr/share/dokuwiki/inc/html.php(305): p_wiki_xhtml('index', 0, true, '')
#7 /usr/share/dokuwiki/inc/Action/Show.php(33): html_show()
#8 /usr/share/dokuwiki/inc/template.php(99): dokuwiki\\Action\\Show->tplContent()
#9 in /usr/share/dokuwiki/lib/plugins/combo/class/XmlUtility.php on line 110
</console>

==== Is SimpleXml Enabled ====

To check your installation, in a php environment, you make use of the ''phpinfo'' output.

You can the output:
  * via the command line
<code bash>
php -m
</code>
  * via a php page, created at the root of your server. If you create the ''phpinfo.php'' with the below code, it will be accessible at http://host/phpinfo.php
<code php phpinfo.php>
<?php
phpinfo();
</code>

The ''php info'' will show if ''SimpleXml'' is enabled as extension:

<box elevation="high" align="center" width="fit-content">
{{:support:simplexml_enabled_phpinfo.png|}}
</box>
\\

If the extensions is not enabled, you need to enable it.

==== Enabling the SimpleXml Extension ====

Due to the complexity of server installation, we are giving below some tips but we can't help more without having access to the server.

=== Windows ===
For windows, you should [[https://windows.php.net/download|install a php]] that was compiled with ''SimpleXml'' (which should be the default)

=== Linux ===

On Linux, it may be:
  * not installed by default:
<code bash>
# ubuntu, ...
sudo apt-get install php-xml
# centos, redhat
sudo yum install php-xml
</code>
  * not configured in the ''php.ini''. Make sure that you see it in the extension.

<box elevation="high" align="center" width="fit-content">
{{:support:simplexml_phpinfo_ini_parsed.png?800|}}
</box>