[sagher]

Try these:

Code: (Select All)

apt-get -y install apt-transport-https lsb-release ca-certificates
wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
apt-get update

I got this in result.

root@xxxxxxxxx:~# apt-get -y install apt-transport-https lsb-release ca-certificates
Reading package lists... Done
Building dependency tree
Reading state information... Done
lsb-release is already the newest version (10.2018112800).
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:
 apt-transport-https : Depends: apt (>= 1.5~alpha4) but 1.4.8 is to be installed
 ca-certificates : Depends: openssl (>= 1.1.1) but 1.1.0f-3+deb9u2 is to be installed
E: Unable to correct problems, you have held broken packages.

root@xxxxxxxxxx:~# wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
--2019-03-07 07:41:43--  https://packages.sury.org/php/apt.gpg
Resolving packages.sury.org (packages.sury.org)... 68.70.205.4, 68.70.205.1, 68.70.205.2, ...
Connecting to packages.sury.org (packages.sury.org)|68.70.205.4|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2239 (2.2K) [application/octet-stream]
Saving to: '/etc/apt/trusted.gpg.d/php.gpg'

/etc/apt/trusted.gp 100%[===================>]   2.19K  --.-KB/s    in 0s

2019-03-07 07:41:43 (70.6 MB/s) - '/etc/apt/trusted.gpg.d/php.gpg' saved [2239/2239]

Added quotation tags - @sagher - please remember to add quotes when the content is not personally written by you.  And copied and pasted. @deanhills