Classes List

Symfony\Component\Translation\Extractor\PhpStringTokenParser

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<?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 $replacements = array(
        '\\' => '\\',
        '$' => '$',
        'n' => "\n",
        'r' => "\r",
        't' => "\t",
        'f' => "\f",
        'v' => "\v",
        'e' => "\x1B",
    );

    /** * Parses a string token. * * @param string $str String token content * * @return string The parsed string */
    public static function parse($str)
    {
        $bLength = 0;
        if ('b' === $str[0]) {
            $bLength = 1;
        }

        if ('\'' === $str[$bLength]) {
            return str_replace(
                array('\\\\''\\\''),
                array('\\''\''),
                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 null|string $quote Quote type * * @return string String with escape sequences parsed */
    public static function parseEscapeSequences($str$quote)
    {
        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})~',
            array(__CLASS__'parseCallback'),
            $str
        );
    }

    private static function parseCallback($matches)
    {
        $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 $str String token content * * @return string Parsed string */
    public static function parseDocString($startToken$str)
    {
        // strip last newline (thanks tokenizer for sticking it into the string!)
        $str = preg_replace('~(\r\n|\n|\r)$~'''$str);

        // nowdoc string
        if (false !== strpos($startToken'\'')) {
            return $str;
        }

        return self::parseEscapeSequences($strnull);
    }
}