Here we cover the fastest, most effective way to get the PHP DOM extension installed on CentOS. If you’ve just found out you need to install this extension, but don’t really know what it is, we’ve included some background first.
What is DOM?
What is PHP DOM extension?
“The DOM extension allows you to operate on XML documents through the DOM API with PHP 5.” (Source: Introduction to the PHP DOM Extension on php.net.)
How to install the PHP DOM Extension on CentOS
You will need superuser privileges. Run the following command:
sudo yum install php-xml
Don’t forget to restart Apache so PHP picks up the new extension:
sudo service httpd restart
How to Check PHP DOM is Installed
You can see PHP DOM is installed by creating a simple web page that calls the phpinfo() function:
<?php phpinfo(); ?>
When you go to this webpage in a browser, you should see this output for the dom extension if it’s installed:
DOM/XML enabled DOM/XML API Version 20031129 libxml Version 2.6.26 HTML Support enabled XPath Support enabled XPointer Support enabled Schema Support enabled RelaxNG Support enabled
Tested on CentOS 5.3.