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Edit File : Parser.php \| Size : 5.53 KB
<?php namespace Dotenv; use Dotenv\Exception\InvalidFileException; use Dotenv\Regex\Regex; class Parser { const INITIAL_STATE = 0; const UNQUOTED_STATE = 1; const QUOTED_STATE = 2; const ESCAPE_STATE = 3; const WHITESPACE_STATE = 4; const COMMENT_STATE = 5; /** * Parse the given environment variable entry into a name and value. * * @param string $entry * * @throws \Dotenv\Exception\InvalidFileException * * @return array / public static function parse($entry) { list($name, $value) = self::splitStringIntoParts($entry); return [self::parseName($name), self::parseValue($value)]; } /* * Split the compound string into parts. * * @param string $line * * @throws \Dotenv\Exception\InvalidFileException * * @return array / private static function splitStringIntoParts($line) { $name = $line; $value = null; if (strpos($line, '=') !== false) { list($name, $value) = array_map('trim', explode('=', $line, 2)); } if ($name === '') { throw new InvalidFileException( self::getErrorMessage('an unexpected equals', $line) ); } return [$name, $value]; } /* * Strips quotes and the optional leading "export " from the variable name. * * @param string $name * * @throws \Dotenv\Exception\InvalidFileException * * @return string / private static function parseName($name) { $name = trim(str_replace(['export ', '\'', '"'], '', $name)); if (!self::isValidName($name)) { throw new InvalidFileException( self::getErrorMessage('an invalid name', $name) ); } return $name; } /* * Is the given variable name valid? * * @param string $name * * @return bool / private static function isValidName($name) { return Regex::match('~\A[a-zA-Z0-9_.]+\z~', $name)->success()->getOrElse(0) === 1; } /* * Strips quotes and comments from the environment variable value. * * @param string\|null $value * * @throws \Dotenv\Exception\InvalidFileException * * @return string\|null / private static function parseValue($value) { if ($value === null \|\| trim($value) === '') { return $value; } $result = array_reduce(str_split($value), function ($data, $char) use ($value) { switch ($data[1]) { case self::INITIAL_STATE: if ($char === '"' \|\| $char === '\'') { return [$data[0], self::QUOTED_STATE]; } elseif ($char === '#') { return [$data[0], self::COMMENT_STATE]; } else { return [$data[0].$char, self::UNQUOTED_STATE]; } case self::UNQUOTED_STATE: if ($char === '#') { return [$data[0], self::COMMENT_STATE]; } elseif (ctype_space($char)) { return [$data[0], self::WHITESPACE_STATE]; } else { return [$data[0].$char, self::UNQUOTED_STATE]; } case self::QUOTED_STATE: if ($char === $value[0]) { return [$data[0], self::WHITESPACE_STATE]; } elseif ($char === '\\') { return [$data[0], self::ESCAPE_STATE]; } else { return [$data[0].$char, self::QUOTED_STATE]; } case self::ESCAPE_STATE: if ($char === $value[0] \|\| $char === '\\') { return [$data[0].$char, self::QUOTED_STATE]; } elseif (in_array($char, ['f', 'n', 'r', 't', 'v'], true)) { return [$data[0].stripcslashes('\\'.$char), self::QUOTED_STATE]; } else { throw new InvalidFileException( self::getErrorMessage('an unexpected escape sequence', $value) ); } case self::WHITESPACE_STATE: if ($char === '#') { return [$data[0], self::COMMENT_STATE]; } elseif (!ctype_space($char)) { throw new InvalidFileException( self::getErrorMessage('unexpected whitespace', $value) ); } else { return [$data[0], self::WHITESPACE_STATE]; } case self::COMMENT_STATE: return [$data[0], self::COMMENT_STATE]; } }, ['', self::INITIAL_STATE]); if ($result[1] === self::QUOTED_STATE \|\| $result[1] === self::ESCAPE_STATE) { throw new InvalidFileException( self::getErrorMessage('a missing closing quote', $value) ); } return $result[0]; } /* * Generate a friendly error message. * * @param string $cause * @param string $subject * * @return string */ private static function getErrorMessage($cause, $subject) { return sprintf( 'Failed to parse dotenv file due to %s. Failed at [%s].', $cause, strtok($subject, "\n") ); } } Back

Edit File : Parser.php | Size : 5.53 KB

<?php

namespace Dotenv;

use Dotenv\Exception\InvalidFileException;
use Dotenv\Regex\Regex;

class Parser
{
    const INITIAL_STATE = 0;
    const UNQUOTED_STATE = 1;
    const QUOTED_STATE = 2;
    const ESCAPE_STATE = 3;
    const WHITESPACE_STATE = 4;
    const COMMENT_STATE = 5;

/**
     * Parse the given environment variable entry into a name and value.
     *
     * @param string $entry
     *
     * @throws \Dotenv\Exception\InvalidFileException
     *
     * @return array
     */
    public static function parse($entry)
    {
        list($name, $value) = self::splitStringIntoParts($entry);

return [self::parseName($name), self::parseValue($value)];
    }

/**
     * Split the compound string into parts.
     *
     * @param string $line
     *
     * @throws \Dotenv\Exception\InvalidFileException
     *
     * @return array
     */
    private static function splitStringIntoParts($line)
    {
        $name = $line;
        $value = null;

if (strpos($line, '=') !== false) {
            list($name, $value) = array_map('trim', explode('=', $line, 2));
        }

if ($name === '') {
            throw new InvalidFileException(
                self::getErrorMessage('an unexpected equals', $line)
            );
        }

return [$name, $value];
    }

/**
     * Strips quotes and the optional leading "export " from the variable name.
     *
     * @param string $name
     *
     * @throws \Dotenv\Exception\InvalidFileException
     *
     * @return string
     */
    private static function parseName($name)
    {
        $name = trim(str_replace(['export ', '\'', '"'], '', $name));

if (!self::isValidName($name)) {
            throw new InvalidFileException(
                self::getErrorMessage('an invalid name', $name)
            );
        }

return $name;
    }

/**
     * Is the given variable name valid?
     *
     * @param string $name
     *
     * @return bool
     */
    private static function isValidName($name)
    {
        return Regex::match('~\A[a-zA-Z0-9_.]+\z~', $name)->success()->getOrElse(0) === 1;
    }

/**
     * Strips quotes and comments from the environment variable value.
     *
     * @param string|null $value
     *
     * @throws \Dotenv\Exception\InvalidFileException
     *
     * @return string|null
     */
    private static function parseValue($value)
    {
        if ($value === null || trim($value) === '') {
            return $value;
        }

$result = array_reduce(str_split($value), function ($data, $char) use ($value) {
            switch ($data[1]) {
                case self::INITIAL_STATE:
                    if ($char === '"' || $char === '\'') {
                        return [$data[0], self::QUOTED_STATE];
                    } elseif ($char === '#') {
                        return [$data[0], self::COMMENT_STATE];
                    } else {
                        return [$data[0].$char, self::UNQUOTED_STATE];
                    }
                case self::UNQUOTED_STATE:
                    if ($char === '#') {
                        return [$data[0], self::COMMENT_STATE];
                    } elseif (ctype_space($char)) {
                        return [$data[0], self::WHITESPACE_STATE];
                    } else {
                        return [$data[0].$char, self::UNQUOTED_STATE];
                    }
                case self::QUOTED_STATE:
                    if ($char === $value[0]) {
                        return [$data[0], self::WHITESPACE_STATE];
                    } elseif ($char === '\\') {
                        return [$data[0], self::ESCAPE_STATE];
                    } else {
                        return [$data[0].$char, self::QUOTED_STATE];
                    }
                case self::ESCAPE_STATE:
                    if ($char === $value[0] || $char === '\\') {
                        return [$data[0].$char, self::QUOTED_STATE];
                    } elseif (in_array($char, ['f', 'n', 'r', 't', 'v'], true)) {
                        return [$data[0].stripcslashes('\\'.$char), self::QUOTED_STATE];
                    } else {
                        throw new InvalidFileException(
                            self::getErrorMessage('an unexpected escape sequence', $value)
                        );
                    }
                case self::WHITESPACE_STATE:
                    if ($char === '#') {
                        return [$data[0], self::COMMENT_STATE];
                    } elseif (!ctype_space($char)) {
                        throw new InvalidFileException(
                            self::getErrorMessage('unexpected whitespace', $value)
                        );
                    } else {
                        return [$data[0], self::WHITESPACE_STATE];
                    }
                case self::COMMENT_STATE:
                    return [$data[0], self::COMMENT_STATE];
            }
        }, ['', self::INITIAL_STATE]);

if ($result[1] === self::QUOTED_STATE || $result[1] === self::ESCAPE_STATE) {
            throw new InvalidFileException(
                self::getErrorMessage('a missing closing quote', $value)
            );
        }

return $result[0];
    }

/**
     * Generate a friendly error message.
     *
     * @param string $cause
     * @param string $subject
     *
     * @return string
     */
    private static function getErrorMessage($cause, $subject)
    {
        return sprintf(
            'Failed to parse dotenv file due to %s. Failed at [%s].',
            $cause,
            strtok($subject, "\n")
        );
    }
}

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