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<?php |
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namespace Consolidation\Config\Util; |
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use Consolidation\Config\Config; |
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use Consolidation\Config\ConfigInterface; |
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/** |
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* Provide a configuration object that fetches values from environment |
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* variables. |
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*/ |
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class EnvConfig implements ConfigInterface |
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{ |
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/** @var string */ |
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protected $prefix; |
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/** |
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* EnvConfig constructor |
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* |
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* @param $prefix The string to appear before every environment |
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* variable key. For example, if the prefix is 'MYAPP_', then |
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* the key 'foo.bar' will be fetched from the environment variable |
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* MYAPP_FOO_BAR. |
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*/ |
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public function __construct($prefix) |
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{ |
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// Ensure that the prefix is always uppercase, and always |
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// ends with a '_', regardless of the form the caller provided. |
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$this->prefix = strtoupper(rtrim($prefix, '_')) . '_'; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function has($key) |
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{ |
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return $this->get($key) !== null; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function get($key, $defaultFallback = null) |
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{ |
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$envKey = $this->prefix . strtoupper(strtr($key, '.-', '__')); |
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$envKey = str_replace($this->prefix . $this->prefix, $this->prefix, $envKey); |
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return getenv($envKey) ?: $defaultFallback; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function set($key, $value) |
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{ |
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throw new \Exception('Cannot call "set" on environmental configuration.'); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function import($data) |
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{ |
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// no-op |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function export() |
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{ |
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return []; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function hasDefault($key) |
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{ |
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return false; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getDefault($key, $defaultFallback = null) |
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{ |
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return $defaultFallback; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function setDefault($key, $value) |
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{ |
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throw new \Exception('Cannot call "setDefault" on environmental configuration.'); |
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} |
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} |
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consolidation /
config
