'\\', '$' => '$', 'n' => "\n", 'r' => "\r", 't' => "\t", 'f' => "\f", 'v' => "\v", 'e' => "\x1B", ); /** * Constructs a string scalar node. * * @param string $value Value of the string * @param array $attributes Additional attributes */ public function __construct($value = '', array $attributes = array()) { parent::__construct($attributes); $this->value = $value; } public function getSubNodeNames() { return array('value'); } /** * @internal * * 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), '"'); } } /** * @internal * * 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)); } } /** * @internal * * Parses a constant doc string. * * @param string $startToken Doc string start token content (<<