The PHP component of GraphWeather runs on your web server and processes data files uploaded by the desktop application. It parses XML exports, generates graph images using PHP GD functions, and renders template-driven HTML pages with current and historical weather data. The scripts require PHP 5.4 or later and work on standard shared hosting environments. Configuration is handled through a single settings file that specifies data paths, graph parameters, language preferences, and display units. The statistics module calculates monthly and annual summaries, extreme values, and trend analysis from the archived data.