No. You should be able to use WordPress through the user interface, without ever having to touch PHP.

The only time you would modify your WordPress website with PHP would be when integrating some of the plugins. There are a small number of plugins that still require manual edits to your files. In most cases, clear instructions are usually given within a text file with the plugin.

Other than that, you would not be changing any of the PHP files.

WordPress was primarily inspired by Noah Grey‘s Greymatter open-source web log and journal software. It is related to b2, sort of a second cousin twice removed. You can use WordPress to post your own stories, ideas, rants, reviews, links, and pictures of your toothless Uncle Ernie at the wedding reception, if you choose. In addition, you can customize the look and feel of your site. Numerous themes are available and may be modified in many different ways. Through the use of WordPress Themes, you can quickly change the look and style of your site. You can also extend WordPress’ functionality through the use of Plugins. Plugins let you create the website or blog that suits your needs. As you can see, its functionality exceeds or at least is similar to what is available in most blogging tools today.

WordPress is open source web software that you can install on your web server to create your website, blog, community or network. WordPress started out as a tool for blogging, but has evolved into a full-fledged Content Management System (CMS), capable of powering websites, networks and communities.