154 lines
4.4 KiB
PHP
154 lines
4.4 KiB
PHP
<?php
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namespace PhpParser\Node\Scalar;
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use PhpParser\Error;
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use PhpParser\Node\Scalar;
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class String_ extends Scalar
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{
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/* For use in "kind" attribute */
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const KIND_SINGLE_QUOTED = 1;
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const KIND_DOUBLE_QUOTED = 2;
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const KIND_HEREDOC = 3;
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const KIND_NOWDOC = 4;
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/** @var string String value */
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public $value;
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protected static $replacements = array(
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'\\' => '\\',
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'$' => '$',
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'n' => "\n",
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'r' => "\r",
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't' => "\t",
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'f' => "\f",
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'v' => "\v",
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'e' => "\x1B",
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);
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/**
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* Constructs a string scalar node.
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*
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* @param string $value Value of the string
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* @param array $attributes Additional attributes
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*/
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public function __construct($value, array $attributes = array()) {
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parent::__construct($attributes);
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$this->value = $value;
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}
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public function getSubNodeNames() {
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return array('value');
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}
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/**
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* @internal
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*
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* Parses a string token.
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*
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* @param string $str String token content
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* @param bool $parseUnicodeEscape Whether to parse PHP 7 \u escapes
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*
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* @return string The parsed string
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*/
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public static function parse($str, $parseUnicodeEscape = true) {
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$bLength = 0;
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if ('b' === $str[0] || 'B' === $str[0]) {
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$bLength = 1;
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}
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if ('\'' === $str[$bLength]) {
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return str_replace(
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array('\\\\', '\\\''),
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array( '\\', '\''),
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substr($str, $bLength + 1, -1)
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);
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} else {
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return self::parseEscapeSequences(
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substr($str, $bLength + 1, -1), '"', $parseUnicodeEscape
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);
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}
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}
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/**
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* @internal
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*
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* Parses escape sequences in strings (all string types apart from single quoted).
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*
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* @param string $str String without quotes
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* @param null|string $quote Quote type
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* @param bool $parseUnicodeEscape Whether to parse PHP 7 \u escapes
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*
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* @return string String with escape sequences parsed
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*/
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public static function parseEscapeSequences($str, $quote, $parseUnicodeEscape = true) {
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if (null !== $quote) {
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$str = str_replace('\\' . $quote, $quote, $str);
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}
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$extra = '';
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if ($parseUnicodeEscape) {
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$extra = '|u\{([0-9a-fA-F]+)\}';
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}
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return preg_replace_callback(
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'~\\\\([\\\\$nrtfve]|[xX][0-9a-fA-F]{1,2}|[0-7]{1,3}' . $extra . ')~',
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function($matches) {
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$str = $matches[1];
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if (isset(self::$replacements[$str])) {
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return self::$replacements[$str];
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} elseif ('x' === $str[0] || 'X' === $str[0]) {
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return chr(hexdec($str));
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} elseif ('u' === $str[0]) {
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return self::codePointToUtf8(hexdec($matches[2]));
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} else {
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return chr(octdec($str));
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}
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},
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$str
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);
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}
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private static function codePointToUtf8($num) {
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if ($num <= 0x7F) {
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return chr($num);
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}
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if ($num <= 0x7FF) {
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return chr(($num>>6) + 0xC0) . chr(($num&0x3F) + 0x80);
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}
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if ($num <= 0xFFFF) {
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return chr(($num>>12) + 0xE0) . chr((($num>>6)&0x3F) + 0x80) . chr(($num&0x3F) + 0x80);
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}
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if ($num <= 0x1FFFFF) {
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return chr(($num>>18) + 0xF0) . chr((($num>>12)&0x3F) + 0x80)
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. chr((($num>>6)&0x3F) + 0x80) . chr(($num&0x3F) + 0x80);
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}
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throw new Error('Invalid UTF-8 codepoint escape sequence: Codepoint too large');
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}
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/**
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* @internal
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*
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* Parses a constant doc string.
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*
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* @param string $startToken Doc string start token content (<<<SMTHG)
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* @param string $str String token content
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* @param bool $parseUnicodeEscape Whether to parse PHP 7 \u escapes
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*
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* @return string Parsed string
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*/
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public static function parseDocString($startToken, $str, $parseUnicodeEscape = true) {
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// strip last newline (thanks tokenizer for sticking it into the string!)
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$str = preg_replace('~(\r\n|\n|\r)\z~', '', $str);
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// nowdoc string
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if (false !== strpos($startToken, '\'')) {
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return $str;
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}
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return self::parseEscapeSequences($str, null, $parseUnicodeEscape);
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}
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}
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