在centos7通過yum安裝PHP7，首先在終端運行：
rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
提示錯誤：
error: Failed dependencies:
epel-release >= 7 is needed by webtatic-release-7-3.noarch
需要先安裝epel-release。

1.安裝epel-release
通過命令：
yum -y install epel-release
成功安裝。
2.安裝PHP7
終端再次運行如下命令：
rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm

yum install php70w-curl php70w-intl php70w-mbstring php70w-mcrypt php70w-mhash php70w-openssl php70w-PDO php70w-MySQL php70w-SimpleXML php70w-soap php70w-xml php70w-xsl php70w-zip php70w-json php70w-iconv

去 https://www.magentochina.org/blog/configure-magento2-system/magento-2-system-requirements.html 檢查依賴要求

最後按照 https://www.magentochina.org/blog/magento-guide/install-magento-2-1-with-composer.html 進行安裝

centos7安裝magento隨記