我运行完composer global require "fxp/composer-asset-plugin:~1.0.0"这个命令后出现这个

C:\Users\lenovo>composer global require "fxp/composer-asset-plugin:~1.0.0"
Changed current directory to C:/Users/lenovo/AppData/Roaming/Composer
You are running composer with xdebug enabled. This has a major impact on runtime
performance. See https://getcomposer.org/xdebug

  [Composer\Exception\NoSslException]

The openssl extension is required for SSL/TLS protection but is not available.
If you can not enable the openssl extension, you can disable this error, at you
r own risk, by setting the 'disable-tls' option to true.

require [--dev] [--prefer-source] [--prefer-dist] [--no-progress] [--no-update]
[--update-no-dev] [--update-with-dependencies] [--ignore-platform-reqs] [--sort-
packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--] [<packag
es>]...

C:\Users\lenovo>