composer update 无法执行命令原因及解决方法

composer
php 版本7.0
描述:无法执行composer update
报错: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 your own risk, by setting the ‘disable-tls’ option to true.

问题原因 :opensll 未开起

解决方法:php.ini 中配置开启opensll

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