So have installed PHP8.1 from ondrej PPA
1 | sudo add-apt-repository ppa:ondrej/php |
Install PHP8.1
1 2 3 4 5 6 7 8 9 10 11 | sudo apt install php8.1-fpmsudo apt install php8.1sudo apt install php8.1-intlsudo apt install php8.1-mbstringsudo apt install php8.1-mysqlsudo apt install php8.1-xmlsudo apt install php8.1-zipsudo apt install php8.1-opcachesudo apt install php8.1-curlsudo apt install php8.1-mailparsesudo apt install php8.1-imagick |
1 2 3 | # or for greater brevity with bash shellsudo apt install php8.1-{fpm,intl,mbstring,curl,mailparse,imagick,zip,xml,mysql} |
The first thing I found is that /etc/php/8.1/fpm/php-fpm.conf is missing when I try to start the php8.1-fpm.service
1 2 3 4 5 6 | # copy it from 8.0 and editcp /etc/php/8.0/fpm/php-fpm.conf /etc/php/8.1/fpm/php-fpm.conf# find and replace all instances of 8.0 with 8.1 thensystemctl enable php8.1-fpm.servicesystemctl start php8.1-fpm.service |
The next challenge is when trying to enable the needed extensions. I get these errors
1 2 3 | phpenmod -v 8.1 intlWARNING: Module intl ini file doesn't exist under /etc/php/8.1/mods-availableWARNING: Module intl ini file doesn't exist under /etc/php/8.1/mods-available |
The fix is copying the ini files to the mods-available directory to make them available to php8.1-fpm
Find and enable the PHP extensions you need
WordPress docs has a list of recommended extensions => https://make.wordpress.org/hosting/handbook/server-environment/
1 2 3 4 5 6 7 8 9 10 11 12 13 | cp /usr/share/php8.1-mysql/mysql/*.ini /etc/php/8.1/mods-availablephpenmod -v 8.1 mysqliphpenmod -v 8.1 mysqlndphpenmod -v 8.1 pdo_mysqlcp /usr/share/php8.1-opcache/opcache/opcache.ini /etc/php/8.1/mods-available/phpenmod -v 8.1 opcachecp /usr/share/php8.1-common/common/* /etc/php/8.1/mods-available/phpenmod -v 8.1 ctype# repeat for all your needed modules & restart systemctl restart php8.1-fpm.service |
To find out what is missing browse your WordPress site and trigger errors. You might see error screens like the following:
The emails sent to your site admin email address will contain hints as to what's missing. The following says I'm missing the ctype extension
To see the PHP extensions you have enabled
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | ls -1 /etc/php/8.1/fpm/conf.d/ 10-mysqlnd.ini10-opcache.ini20-ctype.ini20-curl.ini20-gd.ini20-imagick.ini20-intl.ini20-mbstring.ini20-mysqli.ini20-pdo_mysql.ini20-soap.ini20-tidy.ini20-zip.ini |
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