Where do I find the autoload file?
Here is error message
ubuntu@ip-172-31-91-195:~$ composer require phpoffice/phpspreadsheet
Installation failed, deleting ./composer.json.
In RequireCommand.php line 210:
No composer.json present in the current directory (./composer.json), this may be the cause of the following exception.
In InitCommand.php line 904:
Package phpoffice/phpspreadsheet has requirements incompatible with your PHP version, PHP extensions and Composer version:
- phpoffice/phpspreadsheet 1.29.0 requires ext-dom * but it is not present.
- phpoffice/phpspreadsheet 1.29.0 requires ext-simplexml * but it is not present.
- phpoffice/phpspreadsheet 1.29.0 requires ext-xml * but it is not present.
- phpoffice/phpspreadsheet 1.29.0 requires ext-xmlreader * but it is not present.
- phpoffice/phpspreadsheet 1.29.0 requires ext-xmlwriter * but it is not present.
- phpoffice/phpspreadsheet 1.29.0 requires ext-zip * but it is not present.
require [--dev] [--dry-run] [--prefer-source] [--prefer-dist] [--prefer-install PREFER-INSTALL] [--fixed] [--no-suggest] [--no-progress] [--no-update] [--no-install] [--update-no-dev] [-w|--update-with-dependencies] [-W|--update-with-all-dependencies] [--with-dependencies] [--with-all-dependencies] [--ignore-platform-req IGNORE-PLATFORM-REQ] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--apcu-autoloader-prefix APCU-AUTOLOADER-PREFIX] [--] [<packages>...]