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<?php |
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2
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3
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namespace Lib\Env\Parser; |
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use Lib\Env\Exception\FormatException; |
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6
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7
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class DotenvParser implements EnvParserInterface |
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8
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{ |
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9
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private const REGEX_VARNAME = '(export[ \t]++)?((?i:[A-Z][A-Z0-9_]*+))'; |
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private const REGEX_QUOTED = '/["\']+(?:.*)["\']+$/A'; |
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private const REGEX_EMPTY_OR_COMMENT = '(?:\s*+(?:#[^\n]*+)?+)++'; |
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12
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13
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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($line)) { |
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continue; |
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} |
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[$name, $value] = explode('=', $line, 2); |
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try { |
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$this->lexName($name); |
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$this->lexValue($value); |
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} catch (\Exception $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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if (preg_match('/'.self::REGEX_EMPTY_OR_COMMENT.'/A', $line)) { |
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return true; |
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} |
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return false; |
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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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49
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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(' #', $value, 2)[0]; |
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54
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if ($this->isQuoted($value)) { |
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// strip quotes |
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$value = substr(substr($value, 0, -1), 1); |
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$pos = strpos($value, '"'); |
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if (0 !== $pos && \strlen($value) - 1 !== $pos) { |
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if ($value{$pos - 1} !== '\\') { |
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throw new FormatException('value', $value); |
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} |
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63
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} |
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} |
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} |
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66
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67
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private function isQuoted(string $value): bool |
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68
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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
For hinted functions/methods where all return statements with the correct type are only reachable via conditions, ?null? gets implicitly returned which may be incompatible with the hinted type. Let?s take a look at an example: