利于搜索：

Windows 下载安装 php 7.3
安装 composer
composer 使用
--------------------------------------------------

download php 7.3 for Windows

http://files.3qphp.com/f/tempdir-A2YAN1dsWzZWZ1Q7BjQEewM0AjBUYl1uCmBUOg5sAzwHbld9VGcPYVJkUT8FNVQ1VGYGNQI6CTk


--------------------------------------------------
install composer

https://pkg.xyz/#how-to-install-composer

php -r "copy('https://install.phpcomposer.com/installer', 'composer-setup.php');"

php composer-setup.php

    Composer (version 2.3.3) successfully installed to: E:\php7.3\php-7.3.33-Win32-VC15-x64\composer.phar
    Use it: php composer.phar

php -r "unlink('composer-setup.php');"
--------------------------------------------------

download cacert.pem


https://www.cnblogs.com/daizhongxing/p/12738713.html

http://curl.haxx.se/ca/cacert.pem

--------------------------------------------------

set path=%path%;D:\Program Files\Git\bin;D:\Program Files\Git

--------------------------------------------------

安装 phpspreadsheet


..\php ..\composer.phar require phpoffice/phpspreadsheet
..\php ..\composer.phar require phpoffice/phpspreadsheet --prefer-source

--------------------------------------------------

..\php -S localhost:8000 -t www-path

..\php -S localhost:8000 -t vendor/phpoffice/phpspreadsheet/samples