| <?php |
| |
| /* |
| * This file is part of the Symfony package. |
| * |
| * (c) Fabien Potencier <fabien@symfony.com> |
| * |
| * For the full copyright and license information, please view the LICENSE |
| * file that was distributed with this source code. |
| */ |
| |
| namespace Symfony\Component\Translation\Extractor; |
| |
| /* |
| * The following is derived from code at http://github.com/nikic/PHP-Parser |
| * |
| * Copyright (c) 2011 by Nikita Popov |
| * |
| * Some rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * * The names of the contributors may not be used to endorse or |
| * promote products derived from this software without specific |
| * prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| class PhpStringTokenParser |
| { |
| protected static $replacements = [ |
| '\\' => '\\', |
| '$' => '$', |
| 'n' => "\n", |
| 'r' => "\r", |
| 't' => "\t", |
| 'f' => "\f", |
| 'v' => "\v", |
| 'e' => "\x1B", |
| ]; |
| |
| /** |
| * Parses a string token. |
| * |
| * @param string $str String token content |
| * |
| * @return string The parsed string |
| */ |
| public static function parse(string $str) |
| { |
| $bLength = 0; |
| if ('b' === $str[0]) { |
| $bLength = 1; |
| } |
| |
| if ('\'' === $str[$bLength]) { |
| return str_replace( |
| ['\\\\', '\\\''], |
| ['\\', '\''], |
| substr($str, $bLength + 1, -1) |
| ); |
| } else { |
| return self::parseEscapeSequences(substr($str, $bLength + 1, -1), '"'); |
| } |
| } |
| |
| /** |
| * Parses escape sequences in strings (all string types apart from single quoted). |
| * |
| * @param string $str String without quotes |
| * @param string|null $quote Quote type |
| * |
| * @return string String with escape sequences parsed |
| */ |
| public static function parseEscapeSequences(string $str, string $quote = null) |
| { |
| if (null !== $quote) { |
| $str = str_replace('\\'.$quote, $quote, $str); |
| } |
| |
| return preg_replace_callback( |
| '~\\\\([\\\\$nrtfve]|[xX][0-9a-fA-F]{1,2}|[0-7]{1,3})~', |
| [__CLASS__, 'parseCallback'], |
| $str |
| ); |
| } |
| |
| private static function parseCallback(array $matches): string |
| { |
| $str = $matches[1]; |
| |
| if (isset(self::$replacements[$str])) { |
| return self::$replacements[$str]; |
| } elseif ('x' === $str[0] || 'X' === $str[0]) { |
| return \chr(hexdec($str)); |
| } else { |
| return \chr(octdec($str)); |
| } |
| } |
| |
| /** |
| * Parses a constant doc string. |
| * |
| * @param string $startToken Doc string start token content (<<<SMTHG) |
| * @param string $str String token content |
| * |
| * @return string Parsed string |
| */ |
| public static function parseDocString(string $startToken, string $str) |
| { |
| // strip last newline (thanks tokenizer for sticking it into the string!) |
| $str = preg_replace('~(\r\n|\n|\r)$~', '', $str); |
| |
| // nowdoc string |
| if (str_contains($startToken, '\'')) { |
| return $str; |
| } |
| |
| return self::parseEscapeSequences($str, null); |
| } |
| } |