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- <?php
- namespace PhpParser\Node\Scalar;
- use PhpParser\Error;
- use PhpParser\Node\Scalar;
- class String_ extends Scalar
- {
- /* For use in "kind" attribute */
- const KIND_SINGLE_QUOTED = 1;
- const KIND_DOUBLE_QUOTED = 2;
- const KIND_HEREDOC = 3;
- const KIND_NOWDOC = 4;
- /** @var string String value */
- public $value;
- protected static $replacements = array(
- '\\' => '\\',
- '$' => '$',
- '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
- * @param bool $parseUnicodeEscape Whether to parse PHP 7 \u escapes
- *
- * @return string The parsed string
- */
- public static function parse($str, $parseUnicodeEscape = true) {
- $bLength = 0;
- if ('b' === $str[0] || '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), '"', $parseUnicodeEscape
- );
- }
- }
- /**
- * @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
- * @param bool $parseUnicodeEscape Whether to parse PHP 7 \u escapes
- *
- * @return string String with escape sequences parsed
- */
- public static function parseEscapeSequences($str, $quote, $parseUnicodeEscape = true) {
- if (null !== $quote) {
- $str = str_replace('\\' . $quote, $quote, $str);
- }
- $extra = '';
- if ($parseUnicodeEscape) {
- $extra = '|u\{([0-9a-fA-F]+)\}';
- }
- return preg_replace_callback(
- '~\\\\([\\\\$nrtfve]|[xX][0-9a-fA-F]{1,2}|[0-7]{1,3}' . $extra . ')~',
- function($matches) {
- $str = $matches[1];
- if (isset(self::$replacements[$str])) {
- return self::$replacements[$str];
- } elseif ('x' === $str[0] || 'X' === $str[0]) {
- return chr(hexdec($str));
- } elseif ('u' === $str[0]) {
- return self::codePointToUtf8(hexdec($matches[2]));
- } else {
- return chr(octdec($str));
- }
- },
- $str
- );
- }
- private static function codePointToUtf8($num) {
- if ($num <= 0x7F) {
- return chr($num);
- }
- if ($num <= 0x7FF) {
- return chr(($num>>6) + 0xC0) . chr(($num&0x3F) + 0x80);
- }
- if ($num <= 0xFFFF) {
- return chr(($num>>12) + 0xE0) . chr((($num>>6)&0x3F) + 0x80) . chr(($num&0x3F) + 0x80);
- }
- if ($num <= 0x1FFFFF) {
- return chr(($num>>18) + 0xF0) . chr((($num>>12)&0x3F) + 0x80)
- . chr((($num>>6)&0x3F) + 0x80) . chr(($num&0x3F) + 0x80);
- }
- throw new Error('Invalid UTF-8 codepoint escape sequence: Codepoint too large');
- }
- /**
- * @internal
- *
- * Parses a constant doc string.
- *
- * @param string $startToken Doc string start token content (<<<SMTHG)
- * @param string $str String token content
- * @param bool $parseUnicodeEscape Whether to parse PHP 7 \u escapes
- *
- * @return string Parsed string
- */
- public static function parseDocString($startToken, $str, $parseUnicodeEscape = true) {
- // strip last newline (thanks tokenizer for sticking it into the string!)
- $str = preg_replace('~(\r\n|\n|\r)\z~', '', $str);
- // nowdoc string
- if (false !== strpos($startToken, '\'')) {
- return $str;
- }
- return self::parseEscapeSequences($str, null, $parseUnicodeEscape);
- }
- }
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