plugins/CoreAdminHome/Commands/SetConfig.php

<?php

/**
 * Matomo - free/libre analytics platform
 *
 * @link    https://matomo.org
 * @license https://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 */

namespace Piwik\Plugins\CoreAdminHome\Commands;

use Piwik\Config;
use Piwik\Plugin\ConsoleCommand;
use Piwik\Plugins\CoreAdminHome\Commands\SetConfig\ConfigSettingManipulation;

class SetConfig extends ConsoleCommand
{
    protected function configure()
    {
        $this->setName('config:set');
        $this->setDescription('Set one or more config settings in the file config/config.ini.php');
        $this->addOptionalArgument('assignment', 'List of config setting assignments, eg, Section.key=1 or Section.array_key[]=value', null, true);
        $this->addRequiredValueOption('section', null, 'The section the INI config setting belongs to.');
        $this->addRequiredValueOption('key', null, 'The name of the INI config setting.');
        $this->addRequiredValueOption('value', null, 'The value of the setting. (Not JSON encoded)');
        $this->setHelp("This command can be used to set INI config settings on a Piwik instance.

You can set config values two ways, via --section, --key, --value or by command arguments.

To use --section, --key, --value, simply supply those options. You can only set one setting this way, and you cannot
append to arrays.

To use arguments, supply one or more arguments in the following format:
$ ./console config:set 'Section.config_setting_name=\"value\"'
'Section' is the name of the section,
'config_setting_name' the name of the setting and
'value' is the value.

NOTE: 'value' must be JSON encoded, so 'Section.config_setting_name=\"value\"' would work but 'Section.config_setting_name=value' would not.

To append to an array setting, supply an argument like this:
$ ./console config:set 'Section.config_setting_name[]=\"value to append\"'

To reset an array setting, supply an argument like this:
$ ./console config:set 'Section.config_setting_name=[]'

Resetting an array will not work if the array has default values in global.ini.php (such as, [log] log_writers).
In this case the values in global.ini.php will be used, since there is no way to explicitly set an
array setting to empty in INI config.
");
    }

    protected function doExecute(): int
    {
        $input = $this->getInput();
        $output = $this->getOutput();
        $section = $input->getOption('section');
        $key = $input->getOption('key');
        $value = $input->getOption('value');

        $manipulations = $this->getAssignments();

        $isSingleAssignment = !empty($section) && !empty($key) && $value !== false;
        if ($isSingleAssignment) {
            $manipulations[] = new ConfigSettingManipulation($section, $key, $value);
        }

        if (empty($manipulations)) {
            throw new \InvalidArgumentException("Nothing to assign. Add assignments as arguments or use the "
                . "--section, --key and --value options.");
        }

        $config = Config::getInstance();
        foreach ($manipulations as $manipulation) {
            $manipulation->manipulate($config);

            $output->write("<info>Setting [{$manipulation->getSectionName()}] {$manipulation->getName()} = {$manipulation->getValueString()}...</info>");
            $output->writeln("<info> done.</info>");
        }

        $config->forceSave();

        return self::SUCCESS;
    }

    /**
     * @return ConfigSettingManipulation[]
     */
    private function getAssignments()
    {
        $assignments = $this->getInput()->getArgument('assignment');

        $result = [];
        foreach ($assignments as $assignment) {
            $result[] = ConfigSettingManipulation::make($assignment);
        }
        return $result;
    }
}