Discuz 不支持PHP7，最好使用PHP5.X版本
sudo apt-get install -y language-pack-en-base
sudo LC_ALL=en_US.UTF-8 add-apt-repository ppa:ondrej/php
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
安装php5.6sudo apt-get updatesudo apt-get install php5.6安装扩展sudo apt-get install php5.6-gdsudo apt-get install php5.6-mysql安装Apache2sudo apt install apache2sudo apt-get install libapache2-mod-php5.6安装MySQL//sudo apt install mysql-server php5.6-mysql root root0x0
sudo apt install mysql-server php5.6-mysql sudo apt-get install mysql-clientmysql_secure_installation
最后非常重要的，切换php7 到php5
sudo a2dismod php7.0
sudo a2enmod php5.6
sudo service apache2 restart
sudo update-alternatives –set php /usr/bin/php5.6
还可以安装curl
sudo apt-get install php5.6-curl
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参考：
1. https://blog.csdn.net/chencaw/article/details/78784857?utm_source=copy
2. https://www.zhihu.com/question/45999546/answer/100165171
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