I followed the installation text of laravel that is on the official website and returned the following errors.
Warning: require (C: \ xampp \ htdocs \ first_app_laravel \ bootstrap /../ vendor / autoload.php): failed to open stream: No such file or directory in C: \ xampp \ htdocs \ first_app_laravel \ bootstrap \ autoload.php on line 17Fatal error: require (): Failed opening required 'C: \ xampp \ htdocs \ first_app_laravel \ bootstrap /../ vendor / autoload.php' (include_path = 'C: \ xampp \ : \ xampp \ htdocs \ first_app_laravel \ bootstrap \ autoload.php on line 17
To install the composer I practically did next next next and typed the commands that were in the same site.