按照以下步骤操作
sudo apt-get install php5-mssql
更新/etc/freetds/freetds.conf

Follow these steps
sudo apt-get install php5-mssql
Update /etc/freetds/freetds.conf

[global]  
# TDS protocol version
; tds version = 4.2
tds version = 8.0
client charset = UTF-8`

将此行添加到 php.ini

mssql.charset = "UTF-8"

参考资料: Laracast讨论