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<?php |
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declare(strict_types=1); |
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namespace Lib\Env\Parser; |
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use Lib\Env\Exception\EnvException; |
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use Lib\Env\Exception\FormatException; |
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class DotenvParser implements EnvParserInterface |
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{ |
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private const REGEX_VARNAME = '/(export[ \t]++)?((?i:[A-Z][A-Z0-9_]*+))/A'; |
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private const REGEX_QUOTED = '/["\']+(?:.*)["\']+$/A'; |
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private const REGEX_EMPTY_OR_COMMENT = '/(?:\s*+(?:#[^\n]*+)?+)++/A'; |
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/** |
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* @param string $data |
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* @throws EnvException |
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* @return array |
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*/ |
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public function parse(string $data): array |
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{ |
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$values = []; |
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$lines = explode("\n", $data); |
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foreach ($lines as $line) { |
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if ($this->emptyLine($line)) { |
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continue; |
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} |
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try { |
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[$name, $value] = explode('=', $line, 2); |
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$name = $this->lexName($name); |
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$value = $this->lexValue($value); |
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} catch (EnvException $e) { |
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throw $e; |
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} |
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$values[$name] = $value; |
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} |
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return $values; |
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} |
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private function emptyLine(string $line): bool |
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{ |
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preg_match(self::REGEX_EMPTY_OR_COMMENT, $line, $matches, 0); |
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return $matches[0] !== '' || $line === ''; |
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} |
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/** |
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* @param string $name |
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* @throws FormatException |
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* @return string |
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*/ |
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private function lexName(string $name): string |
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{ |
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if (!preg_match(self::REGEX_VARNAME, $name, $matches)) { |
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throw new FormatException('name', $name); |
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} |
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return $matches[2]; |
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} |
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/** |
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* @param string $value |
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* |
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* @throws FormatException |
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* |
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* @return string |
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*/ |
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private function lexValue(string $value): string |
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{ |
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// strip inline comments on the right hand side |
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$value = explode(' #', $value, 2)[0]; |
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if ($this->isQuoted($value)) { |
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// strip quotes |
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$value = mb_substr(mb_substr($value, 0, -1), 1); |
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$pos = mb_strpos($value, '"'); |
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if ( |
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false !== $pos && |
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mb_strlen($value) - 1 !== $pos && |
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$value[$pos - 1] !== '\\' |
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) { |
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throw new FormatException('value', $value); |
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} |
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} |
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return $value; |
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} |
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private function isQuoted(string $value): bool |
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{ |
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return (bool) preg_match(self::REGEX_QUOTED, $value); |
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} |
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} |
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Tiriel /
MyBlog
