For openSUSE Slowroll run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mmanu84:php8:php84:Head/openSUSE_Slowroll/home:mmanu84:php8:php84:Head.repo
zypper refresh
zypper install apache2-mod_php8
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mmanu84:php8:php84:Head/openSUSE_Factory/home:mmanu84:php8:php84:Head.repo
zypper refresh
zypper install apache2-mod_php8
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mmanu84:php8:php84:Head/15.6/home:mmanu84:php8:php84:Head.repo
zypper refresh
zypper install apache2-mod_php8
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mmanu84:php8:php84:Head/15.5/home:mmanu84:php8:php84:Head.repo
zypper refresh
zypper install apache2-mod_php8