Uninstall PHP 7.4 in Ubuntu-20.04 in WSL2 and install PHP 8

wangqiang@DESKTOP-QLPK8QM:~$ sudo apt install php
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libfwupdplugin1 libxmlb1
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  apache2 apache2-bin apache2-data apache2-utils libapache2-mod-php7.4 libapr1 libaprutil1 libaprutil1-dbd-sqlite3
  libaprutil1-ldap libjansson4 liblua5.2-0 php-common php7.4 php7.4-cli php7.4-common php7.4-json php7.4-opcache
  php7.4-readline ssl-cert
Suggested packages:
  apache2-doc apache2-suexec-pristine | apache2-suexec-custom php-pear openssl-blacklist
The following NEW packages will be installed:
  apache2 apache2-bin apache2-data apache2-utils libapache2-mod-php7.4 libapr1 libaprutil1 libaprutil1-dbd-sqlite3
Enabling module status.
Enabling module reqtimeout.
Enabling conf charset.
Enabling conf localized-error-pages.
Enabling conf other-vhosts-access-log.
Enabling conf security.
Enabling conf serve-cgi-bin.
Enabling site 000-default.
info: Switch to mpm prefork for package libapache2-mod-php7.4
Module mpm_event disabled.
Enabling module mpm_prefork.
info: Executing deferred 'a2enmod php7.4' for package libapache2-mod-php7.4
Enabling module php7.4.
Created symlink /etc/systemd/system/multi-user.target.wants/apache2.service → /lib/systemd/system/apache2.service.
Created symlink /etc/systemd/system/multi-user.target.wants/apache-htcacheclean.service → /lib/systemd/system/apache-htcacheclean.service.
invoke-rc.d: could not determine current runlevel
Setting up php7.4 (7.4.3-4ubuntu2.18) ...
Setting up php (2:7.4+75) ...
Processing triggers for ufw (0.36-6ubuntu1) ...
Processing triggers for systemd (245.4-4ubuntu3.21) ...
Processing triggers for man-db (2.9.1-1) ...
Processing triggers for libc-bin (2.31-0ubuntu9.9) ...
/sbin/ldconfig.real: /usr/lib/wsl/lib/libcuda.so.1 is not a symbolic link

Processing triggers for php7.4-cli (7.4.3-4ubuntu2.18) ...
Processing triggers for libapache2-mod-php7.4 (7.4.3-4ubuntu2.18) ...

wangqiang@DESKTOP-QLPK8QM:/mnt/e/wwwroot/shopify-app/learn-php-app-ubuntu-2004-0602/web$ sudo apt-get purge php7.*
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'php7.4-ds' for glob 'php7.*'
Note, selecting 'php7.4-bz2' for glob 'php7.*'
Note, selecting 'php7.4-gd' for glob 'php7.*'
Note, selecting 'php7.4-ps' for glob 'php7.*'
Note, selecting 'php7.4-cgi' for glob 'php7.*'
Note, selecting 'php7.4-cli' for glob 'php7.*'
Note, selecting 'php7.4-uuid' for glob 'php7.*'
Note, selecting 'php7.4-pdo-odbc' for glob 'php7.*'
Note, selecting 'php7.4-dba' for glob 'php7.*'
Note, selecting 'php7.4-dev' for glob 'php7.*'
Note, selecting 'php7.4-dom' for glob 'php7.*'
Note, selecting 'php7.4-tidy' for glob 'php7.*'
Note, selecting 'php7.4-ffi' for glob 'php7.*'
Note, selecting 'php7.4-pcov' for glob 'php7.*'
Note, selecting 'php7.0-thrift' for glob 'php7.*'
Note, selecting 'php7.4-fpm' for glob 'php7.*'
Note, selecting 'php7.4-ftp' for glob 'php7.*'
Note, selecting 'php7.4-xmlreader' for glob 'php7.*'
Note, selecting 'php7.4-gmp' for glob 'php7.*'
Note, selecting 'php7.4-mysqli' for glob 'php7.*'
Note, selecting 'php7.4-imagick' for glob 'php7.*'
Note, selecting 'php7.4-sybase' for glob 'php7.*'
Note, selecting 'php7.4-sysvmsg' for glob 'php7.*'
Note, selecting 'php7.4-mongodb' for glob 'php7.*'
Note, selecting 'php7.4-json' for glob 'php7.*'
Note, selecting 'php7.2-sodium' for glob 'php7.*'
Note, selecting 'php7.4-sass' for glob 'php7.*'
Note, selecting 'php7.4-phar' for glob 'php7.*'
Note, selecting 'php7.4-tokenizer' for glob 'php7.*'
Note, selecting 'php7.4-igbinary' for glob 'php7.*'
Note, selecting 'php7.4-pgsql' for glob 'php7.*'
Note, selecting 'php7.4-lua' for glob 'php7.*'
Note, selecting 'php7.4-curl' for glob 'php7.*'
Note, selecting 'php7.4-phpdbg' for glob 'php7.*'
Note, selecting 'php7.4-memcache' for glob 'php7.*'
Note, selecting 'php7.4' for glob 'php7.*'
Note, selecting 'php7.4-interbase' for glob 'php7.*'
Note, selecting 'php7.4-shmop' for glob 'php7.*'
Note, selecting 'php7.4-ldap' for glob 'php7.*'
Note, selecting 'php7.4-radius' for glob 'php7.*'
Note, selecting 'php7.4-pdo-mysql' for glob 'php7.*'
Note, selecting 'php7.4-sysvsem' for glob 'php7.*'
Note, selecting 'php7.4-sysvshm' for glob 'php7.*'
Note, selecting 'php7.4-apcu-bc' for glob 'php7.*'
Note, selecting 'php7.0-common' for glob 'php7.*'
Note, selecting 'php7.4-uploadprogress' for glob 'php7.*'
Note, selecting 'php7.4-pdo' for glob 'php7.*'
Note, selecting 'php7.4-psr' for glob 'php7.*'
Note, selecting 'php7.4-imap' for glob 'php7.*'
Note, selecting 'php7.4-sockets' for glob 'php7.*'
Note, selecting 'php7.4-ctype' for glob 'php7.*'
Note, selecting 'php7.4-calendar' for glob 'php7.*'
Note, selecting 'php7.4-intl' for glob 'php7.*'
Note, selecting 'php7.4-rrd' for glob 'php7.*'
Note, selecting 'php7.4-fileinfo' for glob 'php7.*'
Note, selecting 'php7.4-geoip' for glob 'php7.*'
Note, selecting 'php7.4-sqlite3' for glob 'php7.*'
Note, selecting 'php7.4-odbc' for glob 'php7.*'
Note, selecting 'php7.4-pdo-dblib' for glob 'php7.*'
Note, selecting 'php7.4-xmlrpc' for glob 'php7.*'
Note, selecting 'php7.4-redis' for glob 'php7.*'
Note, selecting 'php7.4-yaml' for glob 'php7.*'
Note, selecting 'php7.4-opcache' for glob 'php7.*'
Note, selecting 'php7.4-snmp' for glob 'php7.*'
Note, selecting 'php7.4-soap' for glob 'php7.*'
Note, selecting 'php7.4-xml' for glob 'php7.*'
Note, selecting 'php7.4-solr' for glob 'php7.*'
Note, selecting 'php7.4-xsl' for glob 'php7.*'
Note, selecting 'php7.4-yac' for glob 'php7.*'
Note, selecting 'php7.4-oauth' for glob 'php7.*'
Note, selecting 'php7.4-zip' for glob 'php7.*'
Note, selecting 'php7.4-zmq' for glob 'php7.*'
Note, selecting 'php7.4-pinba' for glob 'php7.*'
Note, selecting 'php7.4-msgpack' for glob 'php7.*'
Note, selecting 'php7.4-simplexml' for glob 'php7.*'
Note, selecting 'php7.4-gearman' for glob 'php7.*'
Note, selecting 'php7.4-ssh2' for glob 'php7.*'
Note, selecting 'php7.4-pspell' for glob 'php7.*'
Note, selecting 'php7.0-curl' for glob 'php7.*'
Note, selecting 'php7.4-mysql' for glob 'php7.*'
Note, selecting 'php7.4-propro' for glob 'php7.*'
Note, selecting 'php7.4-mbstring' for glob 'php7.*'
Note, selecting 'php7.4-readline' for glob 'php7.*'
Note, selecting 'php7.4-amqp' for glob 'php7.*'
Note, selecting 'php7.4-pdo-firebird' for glob 'php7.*'
Note, selecting 'php7.2-thrift' for glob 'php7.*'
Note, selecting 'php7.4-apcu' for glob 'php7.*'
Note, selecting 'php7.4-exif' for glob 'php7.*'
Note, selecting 'php7.4-xdebug' for glob 'php7.*'
Note, selecting 'php7.4-memcached' for glob 'php7.*'
Note, selecting 'php7.4-mysqlnd' for glob 'php7.*'
Note, selecting 'php7.4-http' for glob 'php7.*'
Note, selecting 'php7.4-pdo-sqlite' for glob 'php7.*'
Note, selecting 'php7.4-common' for glob 'php7.*'
Note, selecting 'php7.4-stomp' for glob 'php7.*'
Note, selecting 'php7.4-raphf' for glob 'php7.*'
Note, selecting 'php7.4-bcmath' for glob 'php7.*'
Note, selecting 'php7.4-mailparse' for glob 'php7.*'
Note, selecting 'php7.4-tideways' for glob 'php7.*'
Note, selecting 'php7.4-gnupg' for glob 'php7.*'
Note, selecting 'php7.4-pdo-pgsql' for glob 'php7.*'
Note, selecting 'php7.4-posix' for glob 'php7.*'
Note, selecting 'php7.4-iconv' for glob 'php7.*'
Note, selecting 'php7.4-gmagick' for glob 'php7.*'
Note, selecting 'php7.4-enchant' for glob 'php7.*'
Note, selecting 'php7.4-gettext' for glob 'php7.*'
Note, selecting 'php7.4-xmlwriter' for glob 'php7.*'
Package 'php7.0-common' is not installed, so not removed
Package 'php7.0-curl' is not installed, so not removed
Package 'php7.2-sodium' is not installed, so not removed
Note, selecting 'php7.4-common' instead of 'php7.4-calendar'
Note, selecting 'php7.4-common' instead of 'php7.4-ctype'
Note, selecting 'php7.4-common' instead of 'php7.4-exif'
Note, selecting 'php7.4-common' instead of 'php7.4-ffi'
Note, selecting 'php7.4-common' instead of 'php7.4-fileinfo'
Note, selecting 'php7.4-common' instead of 'php7.4-ftp'
Note, selecting 'php7.4-common' instead of 'php7.4-gettext'
Note, selecting 'php7.4-common' instead of 'php7.4-iconv'
Note, selecting 'php7.4-common' instead of 'php7.4-pdo'
Note, selecting 'php7.4-common' instead of 'php7.4-phar'
Note, selecting 'php7.4-common' instead of 'php7.4-posix'
Note, selecting 'php7.4-common' instead of 'php7.4-shmop'
Note, selecting 'php7.4-common' instead of 'php7.4-sockets'
Note, selecting 'php7.4-common' instead of 'php7.4-sysvmsg'
Note, selecting 'php7.4-common' instead of 'php7.4-sysvsem'
Note, selecting 'php7.4-common' instead of 'php7.4-sysvshm'
Note, selecting 'php7.4-common' instead of 'php7.4-tokenizer'
Note, selecting 'php7.4-mysql' instead of 'php7.4-mysqli'
Note, selecting 'php7.4-mysql' instead of 'php7.4-mysqlnd'
Note, selecting 'php7.4-mysql' instead of 'php7.4-pdo-mysql'
Note, selecting 'php7.4-odbc' instead of 'php7.4-pdo-odbc'
Note, selecting 'php7.4-pgsql' instead of 'php7.4-pdo-pgsql'
Note, selecting 'php7.4-sqlite3' instead of 'php7.4-pdo-sqlite'
Note, selecting 'php7.4-xml' instead of 'php7.4-dom'
Note, selecting 'php7.4-xml' instead of 'php7.4-simplexml'
Note, selecting 'php7.4-xml' instead of 'php7.4-xmlreader'
Note, selecting 'php7.4-xml' instead of 'php7.4-xmlwriter'
Note, selecting 'php-amqp' instead of 'php7.4-amqp'
Note, selecting 'php-apcu' instead of 'php7.4-apcu'
Note, selecting 'php-apcu-bc' instead of 'php7.4-apcu-bc'
Note, selecting 'php-ds' instead of 'php7.4-ds'
Note, selecting 'php-gearman' instead of 'php7.4-gearman'
Note, selecting 'php-geoip' instead of 'php7.4-geoip'
Note, selecting 'php-gmagick' instead of 'php7.4-gmagick'
Note, selecting 'php-gnupg' instead of 'php7.4-gnupg'
Note, selecting 'php-http' instead of 'php7.4-http'
Note, selecting 'php-igbinary' instead of 'php7.4-igbinary'
Note, selecting 'php-imagick' instead of 'php7.4-imagick'
Note, selecting 'php-lua' instead of 'php7.4-lua'
Note, selecting 'php-mailparse' instead of 'php7.4-mailparse'
Note, selecting 'php-memcache' instead of 'php7.4-memcache'
Note, selecting 'php-memcached' instead of 'php7.4-memcached'
Note, selecting 'php-mongodb' instead of 'php7.4-mongodb'
Note, selecting 'php-msgpack' instead of 'php7.4-msgpack'
Note, selecting 'php-oauth' instead of 'php7.4-oauth'
Note, selecting 'php-pcov' instead of 'php7.4-pcov'
Note, selecting 'php-pinba' instead of 'php7.4-pinba'
Note, selecting 'php-propro' instead of 'php7.4-propro'
Note, selecting 'php-ps' instead of 'php7.4-ps'
Note, selecting 'php-psr' instead of 'php7.4-psr'
Note, selecting 'php-radius' instead of 'php7.4-radius'
Note, selecting 'php-raphf' instead of 'php7.4-raphf'
Note, selecting 'php-redis' instead of 'php7.4-redis'
Note, selecting 'php-rrd' instead of 'php7.4-rrd'
Note, selecting 'php-sass' instead of 'php7.4-sass'
Note, selecting 'php-solr' instead of 'php7.4-solr'
Note, selecting 'php-ssh2' instead of 'php7.4-ssh2'
Note, selecting 'php-stomp' instead of 'php7.4-stomp'
Package 'php7.0-thrift' is not installed, so not removed
Package 'php7.2-thrift' is not installed, so not removed
Note, selecting 'php-tideways' instead of 'php7.4-tideways'
Note, selecting 'php-uploadprogress' instead of 'php7.4-uploadprogress'
Note, selecting 'php-uuid' instead of 'php7.4-uuid'
Note, selecting 'php-xdebug' instead of 'php7.4-xdebug'
Note, selecting 'php-yac' instead of 'php7.4-yac'
Note, selecting 'php-yaml' instead of 'php7.4-yaml'
Note, selecting 'php-zmq' instead of 'php7.4-zmq'
Note, selecting 'php7.4-interbase' instead of 'php7.4-pdo-firebird'
Note, selecting 'php7.4-sybase' instead of 'php7.4-pdo-dblib'
Package 'php7.4' is not installed, so not removed
Package 'php7.4-cgi' is not installed, so not removed
Package 'php7.4-dev' is not installed, so not removed
Package 'php7.4-gd' is not installed, so not removed
Package 'php7.4-gmp' is not installed, so not removed
Package 'php7.4-ldap' is not installed, so not removed
Package 'php7.4-mysql' is not installed, so not removed
Package 'php7.4-odbc' is not installed, so not removed
Package 'php7.4-pgsql' is not installed, so not removed
Package 'php7.4-pspell' is not installed, so not removed
Package 'php7.4-snmp' is not installed, so not removed
Package 'php7.4-sqlite3' is not installed, so not removed
Package 'php7.4-tidy' is not installed, so not removed
Package 'php7.4-xml' is not installed, so not removed
Package 'php7.4-xmlrpc' is not installed, so not removed
Package 'php7.4-bcmath' is not installed, so not removed
Package 'php7.4-bz2' is not installed, so not removed
Package 'php7.4-dba' is not installed, so not removed
Package 'php7.4-enchant' is not installed, so not removed
Package 'php7.4-fpm' is not installed, so not removed
Package 'php7.4-imap' is not installed, so not removed
Package 'php7.4-interbase' is not installed, so not removed
Package 'php7.4-intl' is not installed, so not removed
Package 'php7.4-phpdbg' is not installed, so not removed
Package 'php7.4-soap' is not installed, so not removed
Package 'php7.4-sybase' is not installed, so not removed
Package 'php7.4-xsl' is not installed, so not removed
Package 'php7.4-zip' is not installed, so not removed
The following packages will be REMOVED:
  php7.4-cli* php7.4-common* php7.4-curl* php7.4-json* php7.4-mbstring* php7.4-opcache* php7.4-readline*
0 upgraded, 0 newly installed, 7 to remove and 0 not upgraded.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
(Reading database ... 65835 files and directories currently installed.)
Purging configuration files for php7.4-json (7.4.3-4ubuntu2.18) ...
Purging configuration files for php7.4-common (7.4.3-4ubuntu2.18) ...
dpkg: warning: while removing php7.4-common, directory '/etc/php/7.4/mods-available' not empty so not removed
Purging configuration files for php7.4-curl (7.4.3-4ubuntu2.18) ...
Purging configuration files for php7.4-readline (7.4.3-4ubuntu2.18) ...
Purging configuration files for php7.4-mbstring (7.4.3-4ubuntu2.18) ...
Purging configuration files for php7.4-cli (7.4.3-4ubuntu2.18) ...
Purging configuration files for php7.4-opcache (7.4.3-4ubuntu2.18) ...
wangqiang@DESKTOP-QLPK8QM:/mnt/e/wwwroot/shopify-app/learn-php-app-ubuntu-2004-0602/web$ sudo apt-get autoclean
Reading package lists... Done
Building dependency tree
Reading state information... Done
wangqiang@DESKTOP-QLPK8QM:/mnt/e/wwwroot/shopify-app/learn-php-app-ubuntu-2004-0602/web$ sudo apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
wangqiang@DESKTOP-QLPK8QM:/mnt/e/wwwroot/shopify-app/learn-php-app-ubuntu-2004-0602/web$ sudo dpkg -l | grep PHP
rc  php-common                     2:75                                     all          Common files for PHP packages

wangqiang@DESKTOP-QLPK8QM:/mnt/e/wwwroot/shopify-app/learn-php-app-ubuntu-2004-0602/web$ sudo apt install software-properties-common
Reading package lists... Done
Building dependency tree
Reading state information... Done
software-properties-common is already the newest version (0.99.9.11).
software-properties-common set to manually installed.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
wangqiang@DESKTOP-QLPK8QM:/mnt/e/wwwroot/shopify-app/learn-php-app-ubuntu-2004-0602/web$ sudo add-apt-repository ppa:ondrej/php
 Co-installable PHP versions: PHP 5.6, PHP 7.x, PHP 8.x and most requested extensions are included. Only Supported Versions of PHP (http://php.net/supported-versions.php) for Supported Ubuntu Releases (https://wiki.ubuntu.com/Releases) are provided. Don't ask for end-of-life PHP versions or Ubuntu release, they won't be provided.

Debian oldstable and stable packages are provided as well: https://deb.sury.org/#debian-dpa

You can get more information about the packages at https://deb.sury.org

IMPORTANT: The -backports is now required on older Ubuntu releases.

BUGS&FEATURES: This PPA now has a issue tracker:
https://deb.sury.org/#bug-reporting

CAVEATS:
1. If you are using php-gearman, you need to add ppa:ondrej/pkg-gearman
2. If you are using apache2, you are advised to add ppa:ondrej/apache2
3. If you are using nginx, you are advised to add ppa:ondrej/nginx-mainline
   or ppa:ondrej/nginx

PLEASE READ: If you like my work and want to give me a little motivation, please consider donating regularly: https://donate.sury.org/

WARNING: add-apt-repository is broken with non-UTF-8 locales, see
https://github.com/oerdnj/deb.sury.org/issues/56 for workaround:

# LC_ALL=C.UTF-8 add-apt-repository ppa:ondrej/php
 More info: https://launchpad.net/~ondrej/+archive/ubuntu/php
Press [ENTER] to continue or Ctrl-c to cancel adding it.

Hit:1 https://deb.nodesource.com/node_18.x focal InRelease
Get:2 http://ppa.launchpad.net/ondrej/php/ubuntu focal InRelease [23.9 kB]
Hit:3 http://archive.ubuntu.com/ubuntu focal InRelease
Get:4 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Get:5 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:6 http://ppa.launchpad.net/ondrej/php/ubuntu focal/main amd64 Packages [115 kB]
Get:7 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages [2229 kB]
Get:8 http://archive.ubuntu.com/ubuntu focal-backports InRelease [108 kB]
Get:9 http://security.ubuntu.com/ubuntu focal-security/main Translation-en [358 kB]
Get:10 http://ppa.launchpad.net/ondrej/php/ubuntu focal/main Translation-en [37.5 kB]
Fetched 3100 kB in 10s (301 kB/s)
Reading package lists... Done
wangqiang@DESKTOP-QLPK8QM:/mnt/e/wwwroot/shopify-app/learn-php-app-ubuntu-2004-0602/web$ sudo apt update
Hit:1 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:2 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:3 http://ppa.launchpad.net/ondrej/php/ubuntu focal InRelease
Hit:4 https://deb.nodesource.com/node_18.x focal InRelease
Hit:5 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:6 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Reading package lists... Done
Building dependency tree
Reading state information... Done
6 packages can be upgraded. Run 'apt list --upgradable' to see them.
wangqiang@DESKTOP-QLPK8QM:/mnt/e/wwwroot/shopify-app/learn-php-app-ubuntu-2004-0602/web$

wangqiang@DESKTOP-QLPK8QM:/mnt/e/wwwroot/shopify-app/learn-php-app-ubuntu-2004-0602/web$ sudo apt install php8.1
wangqiang@DESKTOP-QLPK8QM:/mnt/e/wwwroot/shopify-app/learn-php-app-ubuntu-2004-0602/web$ php -v
PHP 8.1.18 (cli) (built: Apr 14 2023 04:39:24) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.18, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.18, Copyright (c), by Zend Technologies