Before creating your first Symfony application you must:
Install PHP 8.2 or higher and these PHP extensions (which are installed and enabled by default in most PHP 8 installations): Ctype, iconv, PCRE, Session, SimpleXML, and Tokenizer;
Install Composer, which is used to install PHP packages.
Also, install the Symfony CLI. This is optional, but it gives you a helpful binary called symfony that provides all tools you need to develop and run your Symfony application locally.
The symfony binary also provides a tool to check if your computer meets all requirements. Open your console terminal and run this command: