我正在尝试安装 php5-pgsql：
apt-get install php5-pgsql
但我收到此消息：
The following packages have unmet dependencies:
php5-pgsql :
Depends: phpapi-20121212
Depends: php5-common (= 5.5.9+dfsg-1ubuntu4.21) but 5.6.23+dfsg-1+deprecated+dontuse+deb.sury.org~trusty+1 is to be installed
E: Unable to correct problems, you have held broken packages.
我尝试了找到的所有解决方案但都没有用！