安装sqlserver驱动
sudo su
curl https://packages.microsoft.com/config/rhel/7/prod.repo > /etc/yum.repos.d/mssqlrelease.repo
exit
sudo yum update
sudo yum remove unixODBC
#to avoid conflicts
sudo ACCEPT_EULA=Y yum install msodbcsql mssql-tools sudo yum install unixODBC-devel
*Note: You need to make sure you install PHP 7 before you proceed to step 2. The Microsoft PHP Drivers for SQL Server will only work for PHP 7+
安装sqlsrv和pdo_sqlsrv扩展
sudo pecl install sqlsrv
sudo pecl install pdo_sqlsrv