133 lines
4.1 KiB
PHP
133 lines
4.1 KiB
PHP
<?php
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namespace Dotenv;
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use Dotenv\Exception\InvalidFileException;
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class Parser
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{
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const INITIAL_STATE = 0;
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const QUOTED_STATE = 1;
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const ESCAPE_STATE = 2;
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const WHITESPACE_STATE = 3;
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const COMMENT_STATE = 4;
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/**
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* Parse the given variable name.
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*
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* @param string $name
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*
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* @return string
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*/
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public static function parseName($name)
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{
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return trim(str_replace(array('export ', '\'', '"'), '', $name));
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}
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/**
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* Parse the given variable value.
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*
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* @param string $value
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*
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* @throws \Dotenv\Exception\InvalidFileException
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*
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* @return string
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*/
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public static function parseValue($value)
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{
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if ($value === '') {
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return '';
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} elseif ($value[0] === '"' || $value[0] === '\'') {
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return Parser::parseQuotedValue($value);
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} else {
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return Parser::parseUnquotedValue($value);
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}
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}
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/**
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* Parse the given quoted value.
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*
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* @param string $value
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*
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* @throws \Dotenv\Exception\InvalidFileException
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*
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* @return string
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*/
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public static function parseQuotedValue($value)
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{
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$result = array_reduce(str_split($value), function ($data, $char) use ($value) {
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switch ($data[1]) {
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case Parser::INITIAL_STATE:
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if ($char === '"' || $char === '\'') {
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return array($data[0], Parser::QUOTED_STATE);
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} else {
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throw new InvalidFileException(
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'Expected the value to start with a quote.'
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);
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}
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case Parser::QUOTED_STATE:
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if ($char === $value[0]) {
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return array($data[0], Parser::WHITESPACE_STATE);
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} elseif ($char === '\\') {
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return array($data[0], Parser::ESCAPE_STATE);
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} else {
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return array($data[0].$char, Parser::QUOTED_STATE);
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}
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case Parser::ESCAPE_STATE:
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if ($char === $value[0] || $char === '\\') {
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return array($data[0].$char, Parser::QUOTED_STATE);
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} else {
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return array($data[0].'\\'.$char, Parser::QUOTED_STATE);
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}
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case Parser::WHITESPACE_STATE:
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if ($char === '#') {
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return array($data[0], Parser::COMMENT_STATE);
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} elseif (!ctype_space($char)) {
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throw new InvalidFileException(
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'Dotenv values containing spaces must be surrounded by quotes.'
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);
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} else {
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return array($data[0], Parser::WHITESPACE_STATE);
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}
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case Parser::COMMENT_STATE:
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return array($data[0], Parser::COMMENT_STATE);
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}
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}, array('', Parser::INITIAL_STATE));
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if ($result[1] === Parser::QUOTED_STATE || $result[1] === Parser::ESCAPE_STATE) {
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throw new InvalidFileException(
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'Dotenv values starting with a quote must finish with a closing quote.'
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);
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}
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return trim($result[0]);
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}
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/**
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* Parse the given unquoted value.
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*
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* @param string $value
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*
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* @throws \Dotenv\Exception\InvalidFileException
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*
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* @return string
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*/
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public static function parseUnquotedValue($value)
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{
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$parts = explode(' #', $value, 2);
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$value = trim($parts[0]);
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// Unquoted values cannot contain whitespace
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if (preg_match('/\s+/', $value) > 0) {
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// Check if value is a comment (usually triggered when empty value with comment)
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if (preg_match('/^#/', $value) > 0) {
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$value = '';
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} else {
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throw new InvalidFileException('Dotenv values containing spaces must be surrounded by quotes.');
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}
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}
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return trim($value);
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}
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}
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