Different PHP Version per domain/folder: selected modules are not used.

Issue

During usage of different PHP versions per domain/folder feature, selected PHP modules of that version are missing, e.g.:

.htaccess:

<FilesMatch "\.(php4|php5|php3|php2|php|phtml)$">
SetHandler application/x-httpd-alt-php80___lsphp
</FilesMatch>

PHP Selector: 

However, the configured modules in the PHP Selector for PHP 8 are not used.

Environment

• Any CloudLinux version
• cPanel 

Solution

1. The PHP modules availability for PHP version per directory is controlled by the /etc/cl.selector/symlinks.rules file, it has to be created according to the https://docs.cloudlinux.com/cloudlinux_os_components/#php-extensions 

2. If that was done but you still have no success and selected modules are not used, please check the file permissions. The /etc/cl.selector/symlinks.rules file can be created manually, and as different servers can have different umask value, a file can be created with incorrect permissions.

3. For example:

[root@server1 ~]# ll /etc/cl.selector/symlinks.rules
-rw-------1 root root 26 Feb 10 14:48 /etc/cl.selector/symlinks.rules

to fix the issue, please apply the correct permissions:

[root@server1 ~]# chmod 0644 /etc/cl.selector/symlinks.rules
[root@server1 ~]# ll /etc/cl.selector/symlinks.rules
-rw-r--r-- 1 root root 26 Feb 10 14:48 /etc/cl.selector/symlinks.rules

and apply symlinks rules:

[root@server1 ~]# selectorctl --apply-symlinks-rules|grep testuser
Processing user testuser

Cause

Missing /etc/cl.selector/symlinks.rules file or incorrect file permission.

Useful links

• geek-university.com/linux/set-the-default-permissions-for-newly-created-files 
• https://docs.cloudlinux.com/cloudlinux_os_components/#php-extensions