How are the app/etc/config.php and app/etc/env.php files loaded?

dmitry_fedyuk · April 8, 2016, 10:52pm

magento/magento2/blob/ec436ce/lib/internal/Magento/Framework/Module/ModuleList.php#L135-L146


/**
 * Loads configuration data only
 *
 * @return void
 */
private function loadConfigData()
{
    $this->config->resetData();
    if (null === $this->configData && null !== $this->config->get(ConfigOptionsListConstants::KEY_MODULES)) {
        $this->configData = $this->config->get(ConfigOptionsListConstants::KEY_MODULES);
    }
}

github.com

magento/magento2/blob/ec436ce/lib/internal/Magento/Framework/Config/ConfigOptionsListConstants.php#L96-L99


/**
 * Key for modules
 */
const KEY_MODULES = 'modules';

github.com

magento/magento2/blob/ec436ce/lib/internal/Magento/Framework/App/DeploymentConfig.php#L58-L72


/**
 * Gets data from flattened data
 *
 * @param string $key
 * @param mixed $defaultValue
 * @return mixed|null
 */
public function get($key = null, $defaultValue = null)
{
    $this->load();
    if ($key === null) {
        return $this->flatData;
    }
    return isset($this->flatData[$key]) ? $this->flatData[$key] : $defaultValue;
}

github.com

magento/magento2/blob/ec436ce/lib/internal/Magento/Framework/App/DeploymentConfig.php#L117-L132


/**
 * Loads the configuration data
 *
 * @return void
 */
private function load()
{
    if (null === $this->data) {
        $this->data = $this->reader->load();
        if ($this->overrideData) {
            $this->data = array_replace($this->data, $this->overrideData);
        }
        // flatten data for config retrieval using get()
        $this->flatData = $this->flattenParams($this->data);
    }
}

Details: How does \Magento\Framework\App\DeploymentConfig::load() work?

github.com

magento/magento2/blob/ec436ce/lib/internal/Magento/Framework/App/DeploymentConfig.php#L68-L72


    if ($key === null) {
        return $this->flatData;
    }
    return isset($this->flatData[$key]) ? $this->flatData[$key] : $defaultValue;
}

dmitry_fedyuk · April 8, 2016, 11:01pm