function Lexer::stripcslashes

2 calls to Lexer::stripcslashes()

Lexer::lexExpression in vendor/twig/twig/src/Lexer.php

Lexer::lexString in vendor/twig/twig/src/Lexer.php

File

vendor/twig/twig/src/Lexer.php, line 398

Class

Lexer

@author Fabien Potencier <fabien@symfony.com>

Namespace

Twig

Code

private function stripcslashes(string $str, string $quoteType) : string {
    $result = '';
    $length = \strlen($str);
    $i = 0;
    while ($i < $length) {
        if (false === ($pos = strpos($str, '\\', $i))) {
            $result .= substr($str, $i);
            break;
        }
        $result .= substr($str, $i, $pos - $i);
        $i = $pos + 1;
        if ($i >= $length) {
            $result .= '\\';
            break;
        }
        $nextChar = $str[$i];
        if (isset(self::SPECIAL_CHARS[$nextChar])) {
            $result .= self::SPECIAL_CHARS[$nextChar];
        }
        elseif ('\\' === $nextChar) {
            $result .= $nextChar;
        }
        elseif ("'" === $nextChar || '"' === $nextChar) {
            if ($nextChar !== $quoteType) {
                trigger_deprecation('twig/twig', '3.12', 'Character "%s" should not be escaped; the "\\" character is ignored in Twig 3 but will not be in Twig 4. Please remove the extra "\\" character at position %d in "%s" at line %d.', $nextChar, $i + 1, $this->source
                    ->getName(), $this->lineno);
            }
            $result .= $nextChar;
        }
        elseif ('#' === $nextChar && $i + 1 < $length && '{' === $str[$i + 1]) {
            $result .= '#{';
            ++$i;
        }
        elseif ('x' === $nextChar && $i + 1 < $length && ctype_xdigit($str[$i + 1])) {
            $hex = $str[++$i];
            if ($i + 1 < $length && ctype_xdigit($str[$i + 1])) {
                $hex .= $str[++$i];
            }
            $result .= \chr(hexdec($hex));
        }
        elseif (ctype_digit($nextChar) && $nextChar < '8') {
            $octal = $nextChar;
            while ($i + 1 < $length && ctype_digit($str[$i + 1]) && $str[$i + 1] < '8' && \strlen($octal) < 3) {
                $octal .= $str[++$i];
            }
            $result .= \chr(octdec($octal));
        }
        else {
            trigger_deprecation('twig/twig', '3.12', 'Character "%s" should not be escaped; the "\\" character is ignored in Twig 3 but will not be in Twig 4. Please remove the extra "\\" character at position %d in "%s" at line %d.', $nextChar, $i + 1, $this->source
                ->getName(), $this->lineno);
            $result .= $nextChar;
        }
        ++$i;
    }
    return $result;
}