问无法在Raspbian上安装php 7.2

EN

apt-get install apt-transport-https lsb-release ca-certificates
wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list
apt-get update

apt-get install -y php7.2

root@raspberrypi:/home/pi# apt-get install -y php7.2
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 php7.2 : Depends: libapache2-mod-php7.2 but it is not installable or
               php7.2-fpm but it is not installable or
               php7.2-cgi but it is not installable
      Depends: php7.2-common but it is not installable
E: Unable to correct problems, you have held broken packages.