= 0xd800 && $code <= 0xdfff || $code > 0x10ffff) {
throw new Nette\InvalidArgumentException('Code point must be in range 0x0 to 0xD7FF or 0xE000 to 0x10FFFF.');
} elseif (!\extension_loaded('iconv')) {
throw new Nette\NotSupportedException(__METHOD__ . '() requires ICONV extension that is not loaded.');
}
return \iconv('UTF-32BE', 'UTF-8//IGNORE', \pack('N', $code));
}
/**
* Returns a code point of specific character in UTF-8 (number in range 0x0000..D7FF or 0xE000..10FFFF).
*/
public static function ord(string $c) : int
{
if (!\extension_loaded('iconv')) {
throw new Nette\NotSupportedException(__METHOD__ . '() requires ICONV extension that is not loaded.');
}
$tmp = \iconv('UTF-8', 'UTF-32BE//IGNORE', $c);
if (!$tmp) {
throw new Nette\InvalidArgumentException('Invalid UTF-8 character "' . ($c === '' ? '' : '\\x' . \strtoupper(\bin2hex($c))) . '".');
}
return \unpack('N', $tmp)[1];
}
/**
* @deprecated use str_starts_with()
*/
public static function startsWith(string $haystack, string $needle) : bool
{
return \strncmp($haystack, $needle, strlen($needle)) === 0;
}
/**
* @deprecated use str_ends_with()
*/
public static function endsWith(string $haystack, string $needle) : bool
{
return \substr_compare($haystack, $needle, -strlen($needle)) === 0;
}
/**
* @deprecated use str_contains()
*/
public static function contains(string $haystack, string $needle) : bool
{
return \strpos($haystack, $needle) !== \false;
}
/**
* Returns a part of UTF-8 string specified by starting position and length. If start is negative,
* the returned string will start at the start'th character from the end of string.
*/
public static function substring(string $s, int $start, ?int $length = null) : string
{
if (\function_exists('mb_substr')) {
return \mb_substr($s, $start, $length, 'UTF-8');
// MB is much faster
} elseif (!\extension_loaded('iconv')) {
throw new Nette\NotSupportedException(__METHOD__ . '() requires extension ICONV or MBSTRING, neither is loaded.');
} elseif ($length === null) {
$length = self::length($s);
} elseif ($start < 0 && $length < 0) {
$start += self::length($s);
// unifies iconv_substr behavior with mb_substr
}
return \iconv_substr($s, $start, $length, 'UTF-8');
}
/**
* Removes control characters, normalizes line breaks to `\n`, removes leading and trailing blank lines,
* trims end spaces on lines, normalizes UTF-8 to the normal form of NFC.
*/
public static function normalize(string $s) : string
{
// convert to compressed normal form (NFC)
if (\class_exists('Normalizer', \false) && ($n = \Normalizer::normalize($s, \Normalizer::FORM_C)) !== \false) {
$s = $n;
}
$s = self::unixNewLines($s);
// remove control characters; leave \t + \n
$s = self::pcre('preg_replace', ['#[\\x00-\\x08\\x0B-\\x1F\\x7F-\\x9F]+#u', '', $s]);
// right trim
$s = self::pcre('preg_replace', ['#[\\t ]+$#m', '', $s]);
// leading and trailing blank lines
$s = \trim($s, "\n");
return $s;
}
/** @deprecated use Strings::unixNewLines() */
public static function normalizeNewLines(string $s) : string
{
return self::unixNewLines($s);
}
/**
* Converts line endings to \n used on Unix-like systems.
* Line endings are: \n, \r, \r\n, U+2028 line separator, U+2029 paragraph separator.
*/
public static function unixNewLines(string $s) : string
{
return \preg_replace("~\r\n?|
|
~", "\n", $s);
}
/**
* Converts line endings to platform-specific, i.e. \r\n on Windows and \n elsewhere.
* Line endings are: \n, \r, \r\n, U+2028 line separator, U+2029 paragraph separator.
*/
public static function platformNewLines(string $s) : string
{
return \preg_replace("~\r\n?|\n|
|
~", \PHP_EOL, $s);
}
/**
* Converts UTF-8 string to ASCII, ie removes diacritics etc.
*/
public static function toAscii(string $s) : string
{
$iconv = \defined('ICONV_IMPL') ? \trim(\ICONV_IMPL, '"\'') : null;
static $transliterator = null;
if ($transliterator === null) {
if (\class_exists('Transliterator', \false)) {
$transliterator = \Transliterator::create('Any-Latin; Latin-ASCII');
} else {
\trigger_error(__METHOD__ . "(): it is recommended to enable PHP extensions 'intl'.", \E_USER_NOTICE);
$transliterator = \false;
}
}
// remove control characters and check UTF-8 validity
$s = self::pcre('preg_replace', ['#[^\\x09\\x0A\\x0D\\x20-\\x7E\\xA0-\\x{2FF}\\x{370}-\\x{10FFFF}]#u', '', $s]);
// transliteration (by Transliterator and iconv) is not optimal, replace some characters directly
$s = \strtr($s, ["„" => '"', "“" => '"', "”" => '"', "‚" => "'", "‘" => "'", "’" => "'", "°" => '^', "Я" => 'Ya', "я" => 'ya', "Ю" => 'Yu', "ю" => 'yu', "Ä" => 'Ae', "Ö" => 'Oe', "Ü" => 'Ue', "ẞ" => 'Ss', "ä" => 'ae', "ö" => 'oe', "ü" => 'ue', "ß" => 'ss']);
// „ “ ” ‚ ‘ ’ ° Я я Ю ю Ä Ö Ü ẞ ä ö ü ß
if ($iconv !== 'libiconv') {
$s = \strtr($s, ["®" => '(R)', "©" => '(c)', "…" => '...', "«" => '<<', "»" => '>>', "£" => 'lb', "¥" => 'yen', "²" => '^2', "³" => '^3', "µ" => 'u', "¹" => '^1', "º" => 'o', "¿" => '?', "ˊ" => "'", "ˍ" => '_', "˝" => '"', "`" => '', "€" => 'EUR', "™" => 'TM', "℮" => 'e', "←" => '<-', "↑" => '^', "→" => '->', "↓" => 'V', "↔" => '<->']);
// ® © … « » £ ¥ ² ³ µ ¹ º ¿ ˊ ˍ ˝ ` € ™ ℮ ← ↑ → ↓ ↔
}
if ($transliterator) {
$s = $transliterator->transliterate($s);
// use iconv because The transliterator leaves some characters out of ASCII, eg → ʾ
if ($iconv === 'glibc') {
$s = \strtr($s, '?', "\x01");
// temporarily hide ? to distinguish them from the garbage that iconv creates
$s = \iconv('UTF-8', 'ASCII//TRANSLIT//IGNORE', $s);
$s = \str_replace(['?', "\x01"], ['', '?'], $s);
// remove garbage and restore ? characters
} elseif ($iconv === 'libiconv') {
$s = \iconv('UTF-8', 'ASCII//TRANSLIT//IGNORE', $s);
} else {
// null or 'unknown' (#216)
$s = self::pcre('preg_replace', ['#[^\\x00-\\x7F]++#', '', $s]);
// remove non-ascii chars
}
} elseif ($iconv === 'glibc' || $iconv === 'libiconv') {
// temporarily hide these characters to distinguish them from the garbage that iconv creates
$s = \strtr($s, '`\'"^~?', "\x01\x02\x03\x04\x05\x06");
if ($iconv === 'glibc') {
// glibc implementation is very limited. transliterate into Windows-1250 and then into ASCII, so most Eastern European characters are preserved
$s = \iconv('UTF-8', 'WINDOWS-1250//TRANSLIT//IGNORE', $s);
$s = \strtr($s, "\xa5\xa3\xbc\x8c\xa7\x8a\xaa\x8d\x8f\x8e\xaf\xb9\xb3\xbe\x9c\x9a\xba\x9d\x9f\x9e\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf8\xf9\xfa\xfb\xfc\xfd\xfe\x96\xa0\x8b\x97\x9b\xa6\xad\xb7", 'ALLSSSSTZZZallssstzzzRAAAALCCCEEEEIIDDNNOOOOxRUUUUYTsraaaalccceeeeiiddnnooooruuuuyt- <->|-.');
$s = self::pcre('preg_replace', ['#[^\\x00-\\x7F]++#', '', $s]);
} else {
$s = \iconv('UTF-8', 'ASCII//TRANSLIT//IGNORE', $s);
}
// remove garbage that iconv creates during transliteration (eg Ý -> Y')
$s = \str_replace(['`', "'", '"', '^', '~', '?'], '', $s);
// restore temporarily hidden characters
$s = \strtr($s, "\x01\x02\x03\x04\x05\x06", '`\'"^~?');
} else {
$s = self::pcre('preg_replace', ['#[^\\x00-\\x7F]++#', '', $s]);
// remove non-ascii chars
}
return $s;
}
/**
* Modifies the UTF-8 string to the form used in the URL, ie removes diacritics and replaces all characters
* except letters of the English alphabet and numbers with a hyphens.
*/
public static function webalize(string $s, ?string $charlist = null, bool $lower = \true) : string
{
$s = self::toAscii($s);
if ($lower) {
$s = \strtolower($s);
}
$s = self::pcre('preg_replace', ['#[^a-z0-9' . ($charlist !== null ? \preg_quote($charlist, '#') : '') . ']+#i', '-', $s]);
$s = \trim($s, '-');
return $s;
}
/**
* Truncates a UTF-8 string to given maximal length, while trying not to split whole words. Only if the string is truncated,
* an ellipsis (or something else set with third argument) is appended to the string.
*/
public static function truncate(string $s, int $maxLen, string $append = "…") : string
{
if (self::length($s) > $maxLen) {
$maxLen -= self::length($append);
if ($maxLen < 1) {
return $append;
} elseif ($matches = self::match($s, '#^.{1,' . $maxLen . '}(?=[\\s\\x00-/:-@\\[-`{-~])#us')) {
return $matches[0] . $append;
} else {
return self::substring($s, 0, $maxLen) . $append;
}
}
return $s;
}
/**
* Indents a multiline text from the left. Second argument sets how many indentation chars should be used,
* while the indent itself is the third argument (*tab* by default).
*/
public static function indent(string $s, int $level = 1, string $chars = "\t") : string
{
if ($level > 0) {
$s = self::replace($s, '#(?:^|[\\r\\n]+)(?=[^\\r\\n])#', '$0' . \str_repeat($chars, $level));
}
return $s;
}
/**
* Converts all characters of UTF-8 string to lower case.
*/
public static function lower(string $s) : string
{
return \mb_strtolower($s, 'UTF-8');
}
/**
* Converts the first character of a UTF-8 string to lower case and leaves the other characters unchanged.
*/
public static function firstLower(string $s) : string
{
return self::lower(self::substring($s, 0, 1)) . self::substring($s, 1);
}
/**
* Converts all characters of a UTF-8 string to upper case.
*/
public static function upper(string $s) : string
{
return \mb_strtoupper($s, 'UTF-8');
}
/**
* Converts the first character of a UTF-8 string to upper case and leaves the other characters unchanged.
*/
public static function firstUpper(string $s) : string
{
return self::upper(self::substring($s, 0, 1)) . self::substring($s, 1);
}
/**
* Converts the first character of every word of a UTF-8 string to upper case and the others to lower case.
*/
public static function capitalize(string $s) : string
{
return \mb_convert_case($s, \MB_CASE_TITLE, 'UTF-8');
}
/**
* Compares two UTF-8 strings or their parts, without taking character case into account. If length is null, whole strings are compared,
* if it is negative, the corresponding number of characters from the end of the strings is compared,
* otherwise the appropriate number of characters from the beginning is compared.
*/
public static function compare(string $left, string $right, ?int $length = null) : bool
{
if (\class_exists('Normalizer', \false)) {
$left = \Normalizer::normalize($left, \Normalizer::FORM_D);
// form NFD is faster
$right = \Normalizer::normalize($right, \Normalizer::FORM_D);
// form NFD is faster
}
if ($length < 0) {
$left = self::substring($left, $length, -$length);
$right = self::substring($right, $length, -$length);
} elseif ($length !== null) {
$left = self::substring($left, 0, $length);
$right = self::substring($right, 0, $length);
}
return self::lower($left) === self::lower($right);
}
/**
* Finds the common prefix of strings or returns empty string if the prefix was not found.
* @param string[] $strings
*/
public static function findPrefix(array $strings) : string
{
$first = \array_shift($strings);
for ($i = 0; $i < strlen($first); $i++) {
foreach ($strings as $s) {
if (!isset($s[$i]) || $first[$i] !== $s[$i]) {
while ($i && $first[$i - 1] >= "\x80" && $first[$i] >= "\x80" && $first[$i] < "\xc0") {
$i--;
}
return \substr($first, 0, $i);
}
}
}
return $first;
}
/**
* Returns number of characters (not bytes) in UTF-8 string.
* That is the number of Unicode code points which may differ from the number of graphemes.
*/
public static function length(string $s) : int
{
switch (\true) {
case \extension_loaded('mbstring'):
return \mb_strlen($s, 'UTF-8');
case \extension_loaded('iconv'):
return \iconv_strlen($s, 'UTF-8');
default:
return strlen(@\utf8_decode($s));
}
}
/**
* Removes all left and right side spaces (or the characters passed as second argument) from a UTF-8 encoded string.
*/
public static function trim(string $s, string $charlist = self::TrimCharacters) : string
{
$charlist = \preg_quote($charlist, '#');
return self::replace($s, '#^[' . $charlist . ']+|[' . $charlist . ']+$#Du', '');
}
/**
* Pads a UTF-8 string to given length by prepending the $pad string to the beginning.
* @param non-empty-string $pad
*/
public static function padLeft(string $s, int $length, string $pad = ' ') : string
{
$length = \max(0, $length - self::length($s));
$padLen = self::length($pad);
return \str_repeat($pad, (int) ($length / $padLen)) . self::substring($pad, 0, $length % $padLen) . $s;
}
/**
* Pads UTF-8 string to given length by appending the $pad string to the end.
* @param non-empty-string $pad
*/
public static function padRight(string $s, int $length, string $pad = ' ') : string
{
$length = \max(0, $length - self::length($s));
$padLen = self::length($pad);
return $s . \str_repeat($pad, (int) ($length / $padLen)) . self::substring($pad, 0, $length % $padLen);
}
/**
* Reverses UTF-8 string.
*/
public static function reverse(string $s) : string
{
if (!\extension_loaded('iconv')) {
throw new Nette\NotSupportedException(__METHOD__ . '() requires ICONV extension that is not loaded.');
}
return \iconv('UTF-32LE', 'UTF-8', \strrev(\iconv('UTF-8', 'UTF-32BE', $s)));
}
/**
* Returns part of $haystack before $nth occurence of $needle or returns null if the needle was not found.
* Negative value means searching from the end.
*/
public static function before(string $haystack, string $needle, int $nth = 1) : ?string
{
$pos = self::pos($haystack, $needle, $nth);
return $pos === null ? null : \substr($haystack, 0, $pos);
}
/**
* Returns part of $haystack after $nth occurence of $needle or returns null if the needle was not found.
* Negative value means searching from the end.
*/
public static function after(string $haystack, string $needle, int $nth = 1) : ?string
{
$pos = self::pos($haystack, $needle, $nth);
return $pos === null ? null : \substr($haystack, $pos + strlen($needle));
}
/**
* Returns position in characters of $nth occurence of $needle in $haystack or null if the $needle was not found.
* Negative value of `$nth` means searching from the end.
*/
public static function indexOf(string $haystack, string $needle, int $nth = 1) : ?int
{
$pos = self::pos($haystack, $needle, $nth);
return $pos === null ? null : self::length(\substr($haystack, 0, $pos));
}
/**
* Returns position in characters of $nth occurence of $needle in $haystack or null if the needle was not found.
*/
private static function pos(string $haystack, string $needle, int $nth = 1) : ?int
{
if (!$nth) {
return null;
} elseif ($nth > 0) {
if ($needle === '') {
return 0;
}
$pos = 0;
while (($pos = \strpos($haystack, $needle, $pos)) !== \false && --$nth) {
$pos++;
}
} else {
$len = strlen($haystack);
if ($needle === '') {
return $len;
} elseif ($len === 0) {
return null;
}
$pos = $len - 1;
while (($pos = \strrpos($haystack, $needle, $pos - $len)) !== \false && ++$nth) {
$pos--;
}
}
return Helpers::falseToNull($pos);
}
/**
* Divides the string into arrays according to the regular expression. Expressions in parentheses will be captured and returned as well.
* @param bool|int $captureOffset
*/
public static function split(
string $subject,
/**
* @language
*/
string $pattern,
$captureOffset = \false,
bool $skipEmpty = \false,
int $limit = -1,
bool $utf8 = \false
) : array
{
$flags = \is_int($captureOffset) ? $captureOffset : ($captureOffset ? \PREG_SPLIT_OFFSET_CAPTURE : 0) | ($skipEmpty ? \PREG_SPLIT_NO_EMPTY : 0);
$pattern .= $utf8 ? 'u' : '';
$m = self::pcre('preg_split', [$pattern, $subject, $limit, $flags | \PREG_SPLIT_DELIM_CAPTURE]);
return $utf8 && $captureOffset ? self::bytesToChars($subject, [$m])[0] : $m;
}
/**
* Searches the string for the part matching the regular expression and returns
* an array with the found expression and individual subexpressions, or `null`.
* @param bool|int $captureOffset
*/
public static function match(
string $subject,
/**
* @language
*/
string $pattern,
$captureOffset = \false,
int $offset = 0,
bool $unmatchedAsNull = \false,
bool $utf8 = \false
) : ?array
{
$flags = \is_int($captureOffset) ? $captureOffset : ($captureOffset ? \PREG_OFFSET_CAPTURE : 0) | ($unmatchedAsNull ? \PREG_UNMATCHED_AS_NULL : 0);
if ($utf8) {
$offset = strlen(self::substring($subject, 0, $offset));
$pattern .= 'u';
}
if ($offset > strlen($subject)) {
return null;
} elseif (!self::pcre('preg_match', [$pattern, $subject, &$m, $flags, $offset])) {
return null;
} elseif ($utf8 && $captureOffset) {
return self::bytesToChars($subject, [$m])[0];
} else {
return $m;
}
}
/**
* Searches the string for all occurrences matching the regular expression and
* returns an array of arrays containing the found expression and each subexpression.
* @return ($lazy is true ? \Generator : array[])
* @param bool|int $captureOffset
*/
public static function matchAll(
string $subject,
/**
* @language
*/
string $pattern,
$captureOffset = \false,
int $offset = 0,
bool $unmatchedAsNull = \false,
bool $patternOrder = \false,
bool $utf8 = \false,
bool $lazy = \false
)
{
if ($utf8) {
$offset = strlen(self::substring($subject, 0, $offset));
$pattern .= 'u';
}
if ($lazy) {
$flags = \PREG_OFFSET_CAPTURE | ($unmatchedAsNull ? \PREG_UNMATCHED_AS_NULL : 0);
return (function () use($utf8, $captureOffset, $flags, $subject, $pattern, $offset) {
$counter = 0;
while ($offset <= strlen($subject) - ($counter ? 1 : 0) && self::pcre('preg_match', [$pattern, $subject, &$m, $flags, $offset])) {
$offset = $m[0][1] + \max(1, strlen($m[0][0]));
if (!$captureOffset) {
$m = \array_map(function ($item) {
return $item[0];
}, $m);
} elseif ($utf8) {
$m = self::bytesToChars($subject, [$m])[0];
}
(yield $counter++ => $m);
}
})();
}
if ($offset > strlen($subject)) {
return [];
}
$flags = \is_int($captureOffset) ? $captureOffset : ($captureOffset ? \PREG_OFFSET_CAPTURE : 0) | ($unmatchedAsNull ? \PREG_UNMATCHED_AS_NULL : 0) | ($patternOrder ? \PREG_PATTERN_ORDER : 0);
self::pcre('preg_match_all', [$pattern, $subject, &$m, $flags & \PREG_PATTERN_ORDER ? $flags : $flags | \PREG_SET_ORDER, $offset]);
return $utf8 && $captureOffset ? self::bytesToChars($subject, $m) : $m;
}
/**
* Replaces all occurrences matching regular expression $pattern which can be string or array in the form `pattern => replacement`.
* @param string|mixed[] $pattern
* @param string|callable $replacement
*/
public static function replace(
string $subject,
/**
* @language
*/
$pattern,
$replacement = '',
int $limit = -1,
bool $captureOffset = \false,
bool $unmatchedAsNull = \false,
bool $utf8 = \false
) : string
{
if (is_object($replacement) || is_array($replacement)) {
if (!\is_callable($replacement, \false, $textual)) {
throw new Nette\InvalidStateException("Callback '{$textual}' is not callable.");
}
$flags = ($captureOffset ? \PREG_OFFSET_CAPTURE : 0) | ($unmatchedAsNull ? \PREG_UNMATCHED_AS_NULL : 0);
if ($utf8) {
$pattern .= 'u';
if ($captureOffset) {
$replacement = function ($m) use($replacement, $subject) {
return $replacement(self::bytesToChars($subject, [$m])[0]);
};
}
}
if (PHP_VERSION_ID < 70400) {
return self::pcre('preg_replace_callback', [$pattern, $replacement, $subject, $limit]);
}
return self::pcre('preg_replace_callback', [$pattern, $replacement, $subject, $limit, 0, $flags]);
} elseif (is_array($pattern) && \is_string(\key($pattern))) {
$replacement = \array_values($pattern);
$pattern = \array_keys($pattern);
}
if ($utf8) {
$pattern = \array_map(function ($item) {
return $item . 'u';
}, (array) $pattern);
}
return self::pcre('preg_replace', [$pattern, $replacement, $subject, $limit]);
}
private static function bytesToChars(string $s, array $groups) : array
{
$lastBytes = $lastChars = 0;
foreach ($groups as &$matches) {
foreach ($matches as &$match) {
if ($match[1] > $lastBytes) {
$lastChars += self::length(\substr($s, $lastBytes, $match[1] - $lastBytes));
} elseif ($match[1] < $lastBytes) {
$lastChars -= self::length(\substr($s, $match[1], $lastBytes - $match[1]));
}
$lastBytes = $match[1];
$match[1] = $lastChars;
}
}
return $groups;
}
/** @internal */
public static function pcre(string $func, array $args)
{
$res = Callback::invokeSafe($func, $args, function (string $message) use($args) : void {
// compile-time error, not detectable by preg_last_error
throw new RegexpException($message . ' in pattern: ' . \implode(' or ', (array) $args[0]));
});
if (($code = \preg_last_error()) && ($res === null || !\in_array($func, ['preg_filter', 'preg_replace_callback', 'preg_replace'], \true))) {
throw new RegexpException(\preg_last_error_msg() . ' (pattern: ' . \implode(' or ', (array) $args[0]) . ')', $code);
}
return $res;
}
}