Re: [gentoo-user] php different version

[Michael Orlitzky <mjo@gentoo.org>]

On 2021-10-20 19:23:09, zcampe@gmail.com wrote:
> 
> when i install nextcloud it also installs php-7.3.31 and php-7.4.24,
> this is probably due to dev-php/imagick-3.5.1
>

PHP is slotted, so it's not too unusual for multiple versions to be
installed at the same time. An "emerge --depclean" may later remove
the older one. But this alone is no cause for alarm.


> if i install roundcube with use="change-password" php-8.0.11 is needed.
> 
> i used use="-imagemagick" for nextcloud, and
> all packages could agree on php-8.0.11.
> 
> 1.if an application requires 2 different versions this can't work,
> apache only uses one or?

No, you're right. Whichever one you've eselected (if you're using
apache's mod_php) is the one that will be used, and not all of the
options will work with every installed PHP application. It doesn't
make a ton of sense, but PHP is relatively stable these days. So, uh,
good luck.


> 2.if in the ebuild of dev-php/imagick-3.5.1
> USE_PHP="php7-3 php7-4 php8-0"
> what does that mean?

C-language extensions like pecl-imagick are compiled against PHP. The
USE_PHP variable declares which versions they may be compiled
against. Then the user-facing variable PHP_TARGETS says which ones you
want. What you ultimately get is the intersection of USE_PHP and
PHP_TARGETS.