Nextcloud is not compatible with > PHP 7.3

[codiflow]

First you either have to downgrade your PHP version to something like 7.3 or lower to upgrade to NC18. Afterwards you can use PHP 7.4 with it. There are several tutorials out there to tweek the “version check” of NC by hand to bypass this check. I recommend to temporary downgrade to PHP 7.3 or lower.

Then you might get problems with some write permissions as PHP 7.4 has implemented a more hardened version of php-fpm.

Here are two sources what has to be tweeked to get it up and running:

[NC18] Problem to access data folder after upgrade to php 7.4

Hi @Schmu, Sure. With php 7.4.0 they implemented PHP :: Request #72510 :: systemd service should be hardened to hardened php-fpm service unit. The php-fpm systemd service, php-fpm.service, should use be hardened as much as possible against potential attacks. Besides reducing the likelihood of an attack, if php does get compromised, there will be less damage possible. So these are the new options in the php-fpm systemd unit: PrivateTmp=true ProtectHome=true ProtectSystem=full PrivateDev…

18.0.1 to 18.0.3 update - write permission check

If you are using PHP 7.4 you need to enter the paths PHP is allowed to write to. Seems to be a new security feature: systemctl edit php-fpm.service Then enter something like this [Service] ReadWritePaths = /usr/share/webapps/nextcloud/apps ReadWritePaths = /usr/share/webapps/nextcloud/apps2 ReadWritePaths = /etc/webapps/nextcloud/config/ And afterwards restart php.fpm: systemctl restart php-fpm.service Source: [NC18] Problem to access data folder after upgrade to php 7.4

Hope this helps