https://getcomposer.org/
Https://docs.phpcomposer.com/00-intro.html
1) Download Composer-setup.exe,:https://getcomposer.org/composer-setup.exe first
2) in the PHP directory, open the php.ini file and turn on the OpenSSL extension. Remove the semicolon in front of the Extension=php_openssl.dll (;)
3) Download Composer.phar and choose one of two ways
[1]. Add the PHP directory to the environment variable (and the path to the Php.exe sibling directory)
Php-r "ReadFile (' Https://getcomposer.org/installer ');" | Php
[2] Download Composer.phar Https://getcomposer.org/composer.phar
Put the Composer.phar file in the PHP directory
5) Create a new file in the Composer.phar sibling directory Composer.bat
echo @php "%~dp0composer.phar"%*>composer.bat
6) Composer-v
7) Install phpexcel, switch to the project application directory to execute
Composer require Phpoffice/phpexcel
Windows Environment Installation Tutorial Composer