PHP Upgrade from 7.0 to 8.2

Hi all

I need to update our PHP version from 7.0 to 8.2.

I'm trying to follow this thread:
/forum/support/wed-20220824-1719/update-php-...

However, I have a couple of issues.

When using the line to set the old PHP version, this incorrectly picks up 8.0. 
I manually set that to 7.0.
Doing this yields the correct old and new packages.

Then, when I get to the Set up sury.org PHP section, that script fails with a bunch of errors.

Below is the output from running those commands.

Any help would be greatly appreciated.

root@nginx-php-fastcgi /etc# PHPV_NEW=8.2
root@nginx-php-fastcgi /etc# echo $PHPV_NEW
8.2
root@nginx-php-fastcgi /etc# PHPV_OLD=$(apt-cache policy php | sed -n "\|Candidate:| s|.*Candidate: [0-9]\+:\([0-9]\+\.[0-9]\+\).*$|\1|p")
root@nginx-php-fastcgi /etc# echo $PHPV_OLD
8.0
root@nginx-php-fastcgi /etc# PHP_OLD_PKGS=$(apt-cache policy *php${PHPV_OLD}* | grep -v "Installed: (none)" | grep "Installed:" -B1 | sed -n "\|php${PHPV_OLD}| s|^\([a-z0-9\.-]*\).*$|\1|p")
root@nginx-php-fastcgi /etc# echo $PHP_OLD_PKGS

root@nginx-php-fastcgi /etc# PHPV_OLD=7.0
root@nginx-php-fastcgi /etc# echo $PHPV_OLD
7.0
root@nginx-php-fastcgi /etc# PHP_OLD_PKGS=$(apt-cache policy *php${PHPV_OLD}* | grep -v "Installed: (none)" | grep "Installed:" -B1 | sed -n "\|php${PHPV_OLD}| s|^\([a-z0-9\.-]*\).*$|\1|p")
root@nginx-php-fastcgi /etc# echo $PHP_OLD_PKGS
php7.0-cgi php7.0-cli php7.0-gd php7.0-opcache php7.0-common php7.0-json php7.0-mbstring php7.0-readline php7.0-xml php7.0-curl php7.0-mysql
root@nginx-php-fastcgi /etc# PHP_NEW_PKGS=$(echo "$PHP_OLD_PKGS" | sed "s|$PHPV_OLD|$PHPV_NEW|")
root@nginx-php-fastcgi /etc# echo $PHP_NEW_PKGS
php8.2-cgi php8.2-cli php8.2-gd php8.2-opcache php8.2-common php8.2-json php8.2-mbstring php8.2-readline php8.2-xml php8.2-curl php8.2-mysql
root@nginx-php-fastcgi /etc# curl -sSL https://packages.sury.org/php/README.txt | bash -x
++ whoami
+ '[' root '!=' root ']'
+ apt-get update
Ign:1 http://security.debian.org stretch/updates InRelease
Ign:2 http://deb.debian.org/debian stretch InRelease
Err:3 http://security.debian.org stretch/updates Release
  404  Not Found [IP: 199.232.26.132 80]
Err:4 http://deb.debian.org/debian stretch Release
  404  Not Found [IP: 199.232.26.132 80]
Hit:5 http://mirror2.hs-esslingen.de/mariadb/repo/10.4/debian stretch InRelease
Ign:6 https://packages.sury.org/nginx-mainline stretch InRelease
Ign:7 http://archive.turnkeylinux.org/debian stretch-security InRelease
Ign:8 https://packages.sury.org/php stretch InRelease
Err:9 https://packages.sury.org/nginx-mainline stretch Release
  403  Forbidden
Ign:10 http://archive.turnkeylinux.org/debian stretch InRelease
Err:11 https://packages.sury.org/php stretch Release
  403  Forbidden
Ign:12 http://ftp.us.debian.org/debian stretch-backports InRelease
Hit:13 http://archive.turnkeylinux.org/debian stretch-security Release
Err:14 http://ftp.us.debian.org/debian stretch-backports Release
  404  Not Found [IP: 208.80.154.139 80]
Err:15 http://archive.turnkeylinux.org/debian stretch-security Release.gpg
  The following signatures were invalid: EXPKEYSIG 85C25E95A16EB94D Turnkey Linux Release Key <release@turnkeylinux.com>
Hit:16 http://archive.turnkeylinux.org/debian stretch Release
Err:17 http://archive.turnkeylinux.org/debian stretch Release.gpg
  The following signatures were invalid: EXPKEYSIG 85C25E95A16EB94D Turnkey Linux Release Key <release@turnkeylinux.com>
Reading package lists... Done
E: The repository 'http://security.debian.org stretch/updates Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://deb.debian.org/debian stretch Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'https://packages.sury.org/nginx-mainline stretch Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'https://packages.sury.org/php stretch Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ftp.us.debian.org/debian stretch-backports Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://archive.turnkeylinux.org/debian stretch-security Release: The following signatures were invalid: EXPKEYSIG 85C25E95A16EB94D Turnkey Linux Release Key <release@turnkeylinux.com>
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://archive.turnkeylinux.org/debian stretch Release: The following signatures were invalid: EXPKEYSIG 85C25E95A16EB94D Turnkey Linux Release Key <release@turnkeylinux.com>
+ apt-get -y install lsb-release ca-certificates curl
Reading package lists... Done
Building dependency tree
Reading state information... Done
ca-certificates is already the newest version (20200601~deb9u2).
curl is already the newest version (7.52.1-5+deb9u16).
lsb-release is already the newest version (9.20161125).
The following packages were automatically installed and are no longer required:
  libevent-2.0-5 libfile-copy-recursive-perl linux-image-4.9.0-14-amd64 linux-image-4.9.0-15-amd64
  linux-image-4.9.0-16-amd64 linux-image-4.9.0-17-amd64 openbsd-inetd update-inetd
Use 'apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 93 not upgraded.
+ curl -sSLo /usr/share/keyrings/deb.sury.org-php.gpg https://packages.sury.org/php/apt.gpg
+ sh -c 'echo "deb [signed-by=/usr/share/keyrings/deb.sury.org-php.gpg] https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list'
+ apt-get update
Ign:1 http://security.debian.org stretch/updates InRelease
Ign:2 http://deb.debian.org/debian stretch InRelease
Err:3 http://security.debian.org stretch/updates Release
  404  Not Found [IP: 199.232.26.132 80]
Err:4 http://deb.debian.org/debian stretch Release
  404  Not Found [IP: 199.232.26.132 80]
Hit:5 http://mirror2.hs-esslingen.de/mariadb/repo/10.4/debian stretch InRelease
Ign:6 http://archive.turnkeylinux.org/debian stretch-security InRelease
Ign:7 https://packages.sury.org/nginx-mainline stretch InRelease
Ign:8 https://packages.sury.org/php stretch InRelease
Ign:9 http://ftp.us.debian.org/debian stretch-backports InRelease
Ign:10 http://archive.turnkeylinux.org/debian stretch InRelease
Err:11 https://packages.sury.org/nginx-mainline stretch Release
  403  Forbidden
Err:12 https://packages.sury.org/php stretch Release
  403  Forbidden
Hit:13 http://archive.turnkeylinux.org/debian stretch-security Release
Err:14 http://ftp.us.debian.org/debian stretch-backports Release
  404  Not Found [IP: 64.50.233.100 80]
Err:15 http://archive.turnkeylinux.org/debian stretch-security Release.gpg
  The following signatures were invalid: EXPKEYSIG 85C25E95A16EB94D Turnkey Linux Release Key <release@turnkeylinux.com>
Hit:16 http://archive.turnkeylinux.org/debian stretch Release
Err:17 http://archive.turnkeylinux.org/debian stretch Release.gpg
  The following signatures were invalid: EXPKEYSIG 85C25E95A16EB94D Turnkey Linux Release Key <release@turnkeylinux.com>
Reading package lists... Done
E: The repository 'http://security.debian.org stretch/updates Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://deb.debian.org/debian stretch Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'https://packages.sury.org/nginx-mainline stretch Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'https://packages.sury.org/php stretch Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ftp.us.debian.org/debian stretch-backports Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://archive.turnkeylinux.org/debian stretch-security Release: The following signatures were invalid: EXPKEYSIG 85C25E95A16EB94D Turnkey Linux Release Key <release@turnkeylinux.com>
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://archive.turnkeylinux.org/debian stretch Release: The following signatures were invalid: EXPKEYSIG 85C25E95A16EB94D Turnkey Linux Release Key <release@turnkeylinux.com>
root@nginx-php-fastcgi /etc#