wordpress: PHP and the web stack
WordPress is an open source content management system (CMS) written in PHP and designed to build websites and blogs. It usually runs on a combination of technologies that together form the so-called LAMP stack: Linux as the operating system, Apache or nginx as the web server, MySQL or MariaDB as the database, and PHP as the programming language. This combination makes WordPress suitable for both small personal websites and large corporate platforms. Because WordPress is written in PHP, it depends on a well-configured PHP environment to function optimally.
PHP is the core of WordPress. With every request a visitor makes to a WordPress site, a PHP script is executed that retrieves the appropriate content from the database, combines it with templates (usually written in HTML, CSS and JavaScript), and sends a complete HTML page back to the browser. WordPress supports several versions of PHP, but for performance and security it is strongly recommended to use at least PHP 7.4 or higher. Newer versions such as PHP 8.0, 8.1 and 8.2 offer significant speed improvements and better error handling, which directly benefits the loading speed and stability of WordPress sites.
The integration of WordPress with the web stack is essential for its operation. A typical installation starts with a Linux server, on which a web server such as nginx or Apache is installed. Nginx is known for its high efficiency in serving static content and handling many simultaneous connections. The source materials mention a beginner's guide for nginx, which explains, among other things, how to start, stop, and reload the configuration of nginx. This guide also describes how to configure nginx to serve static content and act as a proxy, for example via FastCGI, which is crucial for communication with PHP via PHP-FPM (FastCGI Process Manager).
PHP-FPM is a commonly used way to run PHP scripts in combination with nginx. Instead of loading PHP as a module in the web server (such as mod_php with Apache), nginx communicates via FastCGI with a separately running PHP process. This separation of responsibilities increases stability and scalability. The nginx configuration must then explicitly define routes that forward PHP requests to PHP-FPM, for example by using location blocks ending in .php. The configuration of FastCGI proxies plays an important role here, as also indicated in the nginx guide.
In addition, a database is indispensable for WordPress. Most installations use MySQL or the open source fork MariaDB. WordPress stores all content – such as posts, pages, comments, users and settings – in this database. During the installation of WordPress, a database must be created, and the access details (host, username, password, database name) must be specified in the wp-config.php file. This configuration ensures the link between the PHP part of WordPress and the database.
To make WordPress perform optimally, various additional layers can be integrated into the web stack. Caching is an important part of this. Several levels of caching are possible: at the application level via plugins such as WP Super Cache or W3 Total Cache, at the web server level via nginx caching, or even at the database level via tools such as Redis or Memcached. These technologies reduce the load on the server by temporarily storing frequently requested pages or database queries, so that not every visitor has to cause a full PHP processing and database query.
Security is also a crucial aspect of the WordPress web stack. Because WordPress is popular, it is a common target for attacks. Good security starts with the operating system (Linux), where user rights, firewall settings and regular updates are important. In addition, the web server must be configured correctly to, for example, block access to sensitive files (such as wp-config.php or .git folders). PHP must be set with secure parameters in the php.ini file, such as disabling dangerous functions (e.g. exec(), eval()) and limiting upload size.
For developers working on WordPress, various tools are available to make the development environment more efficient. PhpStorm, a Linux program mentioned in the source materials, is a powerful IDE (Integrated Development Environment) for PHP development. It offers support for PHP 5.3 to 8.2, which is compatible with most WordPress installations. PhpStorm supports automatic code completion, error checking while typing, code refactoring and zero-configuration debugging, which makes it easier to develop plugins, themes or core modifications. In addition, PhpStorm has an integrated editor for HTML, CSS and JavaScript, which is useful because WordPress sites often consist of a combination of these technologies.
Another development tool relevant to WordPress developers is Eclipse IDE, which according to the source materials offers support for PHP and other languages. Although PhpStorm is specifically aimed at PHP, Eclipse offers broader polyglot support, making it suitable for teams working with multiple technologies. Both tools help with writing better, safer and more maintainable code.
Git is often used for managing versions and collaboration. The source materials mention gitweb, a web interface for Git repositories. Although gitweb itself does not play a direct role in WordPress, it illustrates how developers can access source code via a web interface. In practice, many WordPress developers use platforms such as GitHub or GitLab to host their themes and plugins, with automatic deployment via CI/CD pipelines.
WordPress can also be extended with APIs. Resonance, a local API client mentioned in the sources, can be used to test with the WordPress REST API. This API allows developers to programmatically retrieve or modify content from a WordPress site, for example for a headless WordPress setup, where WordPress serves only as a backend and the frontend is built in another technology (such as React or Vue.js).
Markdown editors such as ThiefMD can be useful for writing documentation or blog posts that are later imported into WordPress. ThiefMD supports export to formats such as HTML, PDF and Office, which is easy to convert to WordPress format. For visual development of themes, Pinegrow can be used, a visual web editor that offers support for HTML, CSS, Bootstrap and WordPress. Pinegrow allows designers to quickly build layouts and export them directly to WordPress-compatible files.
Finally, translation plays an important role in WordPress, especially for international websites. Poedit, a translation editor for gettext (PO files), is explicitly mentioned in the source materials. It is often used to translate WordPress themes and plugins into other languages. Because WordPress supports internationalization (i18n) via PO files, Poedit is a valuable tool for developers and translators.
In summary, WordPress is a powerful CMS that is deeply intertwined with the modern web stack. It runs on Linux, uses a web server such as nginx or Apache, communicates via PHP with a database such as MySQL, and can be extended with caching, APIs and development tools. The combination of these technologies provides a flexible, scalable and maintainable solution for building websites. With tools such as PhpStorm, gitweb, Resonance and Poedit, developers can efficiently work on WordPress projects, from development to translation and testing.