Installing PHP8.0, MariaDB and phpmyadmin on Debian 10 OS

Step 1: Install Prerquisite 
apt install -y lsb-release ca-certificates apt-transport-https software-properties-common

Step 2: Add PHP Key

echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" |  tee /etc/apt/sources.list.d/sury-php.list

wget -qO - https://packages.sury.org/php/apt.gpg |  apt-key add –

Step 3: Update Server

apt update

Step 4: Install PHP 8.0 

apt install php8.0 php8.0-common php8.0-mysql php8.0-gmp php8.0-curl php8.0-intl php8.0-mbstring php8.0-xmlrpc php8.0-gd php8.0-xml php8.0-cli php8.0-zip

Step 5: Download phpmyadmin

wget https://files.phpmyadmin.net/phpMyAdmin/5.1.1/phpMyAdmin-5.1.1-all-languages.zip

Step 6: Unzip Downloaded file

unzip phpMyAdmin-5.1.1-all-languages.zip

Step 7: Move Extract File

mv phpMyAdmin-5.1.1-all-languages/ /usr/share/phpmyadmin

Step 8: Create Director tmp

mkdir -p /var/lib/phpmyadmin/tmp

Step 9: Set Permission phpmyadmin Folder

chown -R www-data:www-data /var/lib/phpmyadmin

Step 10: Rename Configure File

cp /usr/share/phpmyadmin/config.sample.inc.php /usr/share/phpmyadmin/config.inc.php

Step 11: Update Configure File

nano /usr/share/phpmyadmin/config.inc.php

$cfg['blowfish_secret'] = 'STRINGOFTHIRTYTWORANDOMCHARACTERS'; /* YOU MUST FILL IN THIS FOR COOKIE AUTH! */

Step 12: Generate 32 Character Password 

apt install pwgen

pwgen -s 32 1

Step 13: Update Configure File

/* User used to manipulate with storage */

// $cfg['Servers'][$i]['controlhost'] = '';

// $cfg['Servers'][$i]['controlport'] = '';

$cfg['Servers'][$i]['controluser'] = 'pma';

$cfg['Servers'][$i]['controlpass'] = 'password';

. . .

/* Storage database and tables */

$cfg['Servers'][$i]['pmadb'] = 'phpmyadmin';

$cfg['Servers'][$i]['bookmarktable'] = 'pma__bookmark';

$cfg['Servers'][$i]['relation'] = 'pma__relation';

$cfg['Servers'][$i]['table_info'] = 'pma__table_info';

$cfg['Servers'][$i]['table_coords'] = 'pma__table_coords';

$cfg['Servers'][$i]['pdf_pages'] = 'pma__pdf_pages';

$cfg['Servers'][$i]['column_info'] = 'pma__column_info';

$cfg['Servers'][$i]['history'] = 'pma__history';

$cfg['Servers'][$i]['table_uiprefs'] = 'pma__table_uiprefs';

$cfg['Servers'][$i]['tracking'] = 'pma__tracking';

$cfg['Servers'][$i]['userconfig'] = 'pma__userconfig';

$cfg['Servers'][$i]['recent'] = 'pma__recent';

$cfg['Servers'][$i]['favorite'] = 'pma__favorite';

$cfg['Servers'][$i]['users'] = 'pma__users';

$cfg['Servers'][$i]['usergroups'] = 'pma__usergroups';

$cfg['Servers'][$i]['navigationhiding'] = 'pma__navigationhiding';

$cfg['Servers'][$i]['savedsearches'] = 'pma__savedsearches';

$cfg['Servers'][$i]['central_columns'] = 'pma__central_columns';

$cfg['Servers'][$i]['designer_settings'] = 'pma__designer_settings';

$cfg['Servers'][$i]['export_templates'] = 'pma__export_templates';

$cfg['TempDir'] = '/var/lib/phpmyadmin/tmp';

Step 14: Install MariaDb and Create Database and User phpmyadmin and Grant Privilige

apt install mariadb-server

mysql_secure_installation

CREATE USER 'phpmyadmin'@'localhost' IDENTIFIED BY 'phpmyadmin123';

GRANT ALL PRIVILEGES ON * . * TO ' phpmyadmin'@'localhost';

FLUSH PRIVILEGES;

mysql -u root –p phpmyadmin < /usr/share/phpmyadmin/sql/create_tables.sql

Step 14: Create Apache conf file for phpmyadmin

nano /etc/apache2/conf-available/phpmyadmin.conf

# phpMyAdmin default Apache configuration

Alias /phpmyadmin /usr/share/phpmyadmin

<Directory /usr/share/phpmyadmin>
    Options SymLinksIfOwnerMatch
    DirectoryIndex index.php

    <IfModule mod_php5.c>
        <IfModule mod_mime.c>
            AddType application/x-httpd-php .php
        </IfModule>
        <FilesMatch ".+\.php$">
            SetHandler application/x-httpd-php
        </FilesMatch>

        php_value include_path .
        php_admin_value upload_tmp_dir /var/lib/phpmyadmin/tmp
        php_admin_value open_basedir /usr/share/phpmyadmin/:/etc/phpmyadmin/:/var/lib/phpmyadmin/:/usr/share/php/php-gettext/:/usr/share/php/php-php-gettext/:/usr/share/javascript/:/usr/share/php/tcpdf/:/usr/share/doc/phpmyadmin/:/usr/share/php/phpseclib/
        php_admin_value mbstring.func_overload 0
    </IfModule>
    <IfModule mod_php.c>
        <IfModule mod_mime.c>
            AddType application/x-httpd-php .php
        </IfModule>
        <FilesMatch ".+\.php$">
            SetHandler application/x-httpd-php
        </FilesMatch>

        php_value include_path .
        php_admin_value upload_tmp_dir /var/lib/phpmyadmin/tmp
        php_admin_value open_basedir /usr/share/phpmyadmin/:/etc/phpmyadmin/:/var/lib/phpmyadmin/:/usr/share/php/php-gettext/:/usr/share/php/php-php-gettext/:/usr/share/javascript/:/usr/share/php/tcpdf/:/usr/share/doc/phpmyadmin/:/usr/share/php/phpseclib/
        php_admin_value mbstring.func_overload 0
    </IfModule>

</Directory>

# Authorize for setup
<Directory /usr/share/phpmyadmin/setup>
    <IfModule mod_authz_core.c>
        <IfModule mod_authn_file.c>
            AuthType Basic
            AuthName "phpMyAdmin Setup"
            AuthUserFile /etc/phpmyadmin/htpasswd.setup
        </IfModule>
        Require valid-user
    </IfModule>
</Directory>

# Disallow web access to directories that don't need it
<Directory /usr/share/phpmyadmin/templates>
    Require all denied
</Directory>
<Directory /usr/share/phpmyadmin/libraries>
    Require all denied
</Directory>
<Directory /usr/share/phpmyadmin/setup/lib>
    Require all denied
</Directory>

Step 15: Enable phpmyadmin

a2enconf phpmyadmin.conf

Step 14: Restart Apache

systemctl reload apache2