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<?php |
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/* |
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* This file is part of the PHP-ENV package. |
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* |
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* (c) Jitendra Adhikari <[email protected]> |
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* <https://github.com/adhocore> |
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* |
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* Licensed under MIT license. |
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*/ |
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namespace Ahc\Env; |
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/** |
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* Environment variable retriever for PHP. |
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* |
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* @author Jitendra Adhikari <[email protected]> |
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* @license MIT |
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* |
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* @link https://github.com/adhocore/env |
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*/ |
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class Retriever |
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{ |
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/** |
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* Get the env variable by its key/name. |
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* |
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* @param string $key |
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* @param mixed $default |
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* @param int|null $filter PHP's filter constants. See http://php.net/filter_var |
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* @param int|array $options Additional options to filter. |
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* |
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* @return mixed |
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*/ |
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public static function getEnv($key, $default = null, $filter = null, $options = null) |
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{ |
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if (false !== $env = \getenv($key)) { |
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return static::prepareValue($env, $filter, $options); |
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} |
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if (isset($_ENV[$key])) { |
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return static::prepareValue($_ENV[$key], $filter, $options); |
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} |
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if (isset($_SERVER[$key])) { |
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return static::prepareValue($_SERVER[$key], $filter, $options); |
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} |
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// Default is not passed through filter! |
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return $default; |
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} |
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protected static function prepareValue($env, $filter, $options) |
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{ |
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static $special = [ |
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'true' => true, 'false' => false, 'null' => null, |
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'TRUE' => true, 'FALSE' => false, 'NULL' => null, |
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]; |
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// strlen($env) < 6. |
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if (!isset($env[5]) && \array_key_exists($env, $special)) { |
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return $special[$env]; |
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} |
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if ($filter === null || !\function_exists('filter_var')) { |
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return $env; |
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} |
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return \filter_var($env, $filter, $options); |
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} |
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} |
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adhocore /
php-env
