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<?php declare(strict_types=1);
namespace PhpParser\Node\Scalar;
use PhpParser\Error;
use PhpParser\Node\Scalar;
class String_ extends Scalar {
/* For use in "kind" attribute */
public const KIND_SINGLE_QUOTED = 1;
public const KIND_DOUBLE_QUOTED = 2;
public const KIND_HEREDOC = 3;
public const KIND_NOWDOC = 4;
/** @var string String value */
public string $value;
/** @var array<string, string> Escaped character to its decoded value */
protected static array $replacements = [
'\\' => '\\',
'$' => '$',
'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<string, mixed> $attributes Additional attributes
*/
public function __construct(string $value, array $attributes = []) {
$this->attributes = $attributes;
$this->value = $value;
}
public function getSubNodeNames(): array {
return ['value'];
}
/**
* @param array<string, mixed> $attributes
* @param bool $parseUnicodeEscape Whether to parse PHP 7 \u escapes
*/
public static function fromString(string $str, array $attributes = [], bool $parseUnicodeEscape = true): self {
$attributes['kind'] = ($str[0] === "'" || ($str[1] === "'" && ($str[0] === 'b' || $str[0] === 'B')))
? Scalar\String_::KIND_SINGLE_QUOTED
: Scalar\String_::KIND_DOUBLE_QUOTED;
$attributes['rawValue'] = $str;
$string = self::parse($str, $parseUnicodeEscape);
return new self($string, $attributes);
}
/**
* @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(string $str, bool $parseUnicodeEscape = true): string {
$bLength = 0;
if ('b' === $str[0] || 'B' === $str[0]) {
$bLength = 1;
}
if ('\'' === $str[$bLength]) {
return str_replace(
['\\\\', '\\\''],
['\\', '\''],
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(string $str, ?string $quote, bool $parseUnicodeEscape = true): string {
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];
}
if ('x' === $str[0] || 'X' === $str[0]) {
return chr(hexdec(substr($str, 1)));
}
if ('u' === $str[0]) {
$dec = hexdec($matches[2]);
// If it overflowed to float, treat as INT_MAX, it will throw an error anyway.
return self::codePointToUtf8(\is_int($dec) ? $dec : \PHP_INT_MAX);
} else {
return chr(octdec($str));
}
},
$str
);
}
/**
* Converts a Unicode code point to its UTF-8 encoded representation.
*
* @param int $num Code point
*
* @return string UTF-8 representation of code point
*/
private static function codePointToUtf8(int $num): string {
if ($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');
}
public function getType(): string {
return 'Scalar_String';
}
}
|
