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<?php |
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/** |
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* Phoole (PHP7.2+) |
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* |
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* @category Library |
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* @package Phoole\Env |
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* @copyright Copyright (c) 2019 Hong Zhang |
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*/ |
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declare(strict_types=1); |
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namespace Phoole\Env; |
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use Phoole\Base\Reference\ReferenceTrait; |
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use Phoole\Base\Reference\ReferenceInterface; |
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/** |
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* Load environment key/value pairs from certain path. |
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* |
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* @package Phoole\Env |
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*/ |
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class Environment implements ReferenceInterface |
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{ |
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use ReferenceTrait; |
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/** |
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* Load environment variables from a .env file |
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* |
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* @param string $path full path of the .env file |
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* @param bool $overwrite overwrite existing values |
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* @return object $this able to chain |
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* @throws \RuntimeException if $path not readable |
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*/ |
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public function load(string $path, bool $overwrite = FALSE): object |
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{ |
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return $this->parse($this->loadPath($path), $overwrite); |
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} |
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/** |
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* Parse an array to set environment variables |
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* |
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* @param array $arr full path of the .env file |
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* @param bool $overwrite overwrite existing env values |
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* @return object $this able to chain |
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*/ |
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public function parse(array $arr, bool $overwrite = FALSE): object |
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{ |
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foreach ($arr as $key => $val) { |
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$this->setEnv($key, $this->deReferenceString($val), $overwrite); |
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} |
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return $this; |
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} |
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/** |
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* load content of a file into array |
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* |
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* @param string $path full path of the .env file |
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* @return array |
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* @throws \RuntimeException if $path not readable |
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*/ |
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protected function loadPath(string $path): array |
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{ |
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try { |
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if ($str = \file_get_contents($path)) { |
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return $this->parseString($str); |
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} |
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return []; |
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} catch (\Throwable $e) { |
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throw new \RuntimeException($e->getMessage()); |
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} |
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} |
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/** |
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* Parse 'ENV = value' into pairs |
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* |
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* @param string $str string to parse |
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* @return array |
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*/ |
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protected function parseString(string $str): array |
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{ |
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$regex = |
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'~^\s*+ |
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(?: |
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(?:([^#\s=]++) \s*+ = \s*+ |
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(?| |
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(([^"\'#\s][^#\n]*?)) | |
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(["\'])((?:\\\2|.)*?)\2 |
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)? |
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) | |
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(?: (\.|source) \s++ ([^#\n]*) ) |
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)\s*?(?:[#].*)? |
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$~mx'; |
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$pairs = []; |
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if (\preg_match_all($regex, $str, $matched, \PREG_SET_ORDER)) { |
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foreach ($matched as $m) { |
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if (isset($m[3])) { |
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$pairs[$m[1]] = $m[3]; |
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} else { |
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$pairs[$m[1]] = ''; |
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} |
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} |
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} |
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return $pairs; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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protected function getReference(string $name) |
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{ |
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$default = ''; |
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if (FALSE !== strpos($name, ':-')) { |
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list($name, $default) = explode(':-', $name, 2); |
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} elseif (FALSE !== strpos($name, ':=')) { |
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list($name, $default) = explode(':=', $name, 2); |
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$this->setEnv($name, $default, FALSE); |
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} |
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return getenv($name) === FALSE ? $default : getenv($name); |
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} |
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/** |
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* @param string $key key to set |
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* @param string $val value to set |
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* @param bool $overwrite |
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* @return void |
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*/ |
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protected function setEnv(string $key, string $val, bool $overwrite): void |
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{ |
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if ($overwrite || FALSE === getenv($key)) { |
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putenv("$key=$val"); |
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} |
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} |
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} |
phoole /
env
