Am currently attempting to get my Laravel application running behind Plesk Onyx. Now when trying to run composer install, I get the following error messages:
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Installation request for doctrine/inflector v1.3.0 -> satisfiable by doctrine/inflector[v1.3.0].
- doctrine/inflector v1.3.0 requires php ^7.1 -> your PHP version (7.0.27) does not satisfy that requirement.
Problem 2
- Installation request for symfony/css-selector v4.0.6 -> satisfiable by symfony/css-selector[v4.0.6].
- symfony/css-selector v4.0.6 requires php ^7.1.3 -> your PHP version (7.0.27) does not satisfy that requirement.
Problem 3
- Installation request for symfony/event-dispatcher v4.0.6 -> satisfiable by symfony/event-dispatcher[v4.0.6].
- symfony/event-dispatcher v4.0.6 requires php ^7.1.3 -> your PHP version (7.0.27) does not satisfy that requirement.
Problem 4
- Installation request for symfony/translation v4.0.6 -> satisfiable by symfony/translation[v4.0.6].
- symfony/translation v4.0.6 requires php ^7.1.3 -> your PHP version (7.0.27) does not satisfy that requirement.
Problem 5
- Installation request for doctrine/instantiator 1.1.0 -> satisfiable by doctrine/instantiator[1.1.0].
- doctrine/instantiator 1.1.0 requires php ^7.1 -> your PHP version (7.0.27) does not satisfy that requirement.
Problem 6
- doctrine/inflector v1.3.0 requires php ^7.1 -> your PHP version (7.0.27) does not satisfy that requirement.
- laravel/framework v5.5.39 requires doctrine/inflector ~1.1 -> satisfiable by doctrine/inflector[v1.3.0].
- Installation request for laravel/framework v5.5.39 -> satisfiable by laravel/framework[v5.5.39].
OK. I understand the errors for sure. I run Debian 9 and "PHP by OS Vendor" is 7.0.27. However, I know that PHP 7.1+ (and even 7.2) is installed on the server, because Plesk'd let me choose (for domains and vhosts) these versions. My question now is: How can I tell composer to use a certain PHP version installed on the server, and how could this work under Debian with Plesk?
Edit: I did not install Composer globally. Just https://getcomposer.org/download/ "Command-line installation".
Here's how:
Find the PHP paths used by Plesk. In my case, this is /opt/plesk/php/. Inside this folder, there are the folders according to PHP versions installed: 7.0, 7.1, 7.2. So php composer.phar install becomes /opt/plesk/php/7.2/bin/php composer.phar install. & it works. :-)