The maximum upload file size in WordPress is determined by the settings in your WordPress installation and your web host...
PHP (officially called Hypertext Preprocessor) is a server-side scripting language used to develop web applications. It can be embedded into HTML code and is commonly used for creating dynamic websites and web applications, such as online stores, social networking sites, and content management systems.PHP is open source and can be run on different operating systems, including Windows, Mac OS, and Linux.