env

PHP extension that parses environment file on module startup and populates getenv() with this information.

This allows you to easily propagate configuration values to all PHP executions, following the 12factor app on Config.

Settings are loaded once, during PHP module startup. There is no additional file parsing necessary during requests, because data is put into the web servers environment variables using setenv.

EXPERIMENTAL This extension is not tested in production yet. It currently works with PHP 5.5, 5.6 and PHP 7 on Non-ZTS builds of PHP.

Working and tested SAPIs:

• CLI
• Apache2
• PHP Builtin Server
• PHP-FPM

Installation

Regular PHP extension installation procedure:

$ phpize
$ ./configure
$ make
$ sudo make install

Configuration

You configure a global configuration file that is used for all invocations of PHP through the CLI or any other SAPI (Apache, FPM) for every request.

env.file=/etc/php5/.env

Example

With an env.file=/etc/php5/.env of the following contents:

FOO=BAR

You can access the information during a PHP request with:

<?php

echo getenv('FOO');

Integration Example: Symfony2

You can integrate this extension into the build process of a Symfony 2 Dependency Injection Container in your AppKernel:

<?php

use Symfony\Component\HttpKernel\Kernel;

class AppKernel extends Kernel
{
    // other methods...

    protected function getEnvParameters()
    {
        $parameters = parent::getEnvParameters();

        $parameters['DATABASE_DSN'] = $this->getenv('DATABASE_DSN');

        return $parameters;
    }

    private function getenv($name)
    {
        $value = getenv($name);

        if ($value === false) {
            throw new \RuntimeException(sprintf("Cannot build application: %s environment variable is missing.", $name));
        }

        return $value;
    }
}

Credits

Inspiration and parts of the code are taken from laruences yaconf extension.

License

MIT License