/**
* @param string $value
*
* @return string
*/
private function replaceUnicodeSequences($value)
{
return preg_replace_callback($this->patterns->getUnicodeEscapePattern(), function (array $match) {
$code = $match[1];
if (bin2hex($code) > 0xfffd) {
$code = '\\FFFD';
}
return mb_convert_encoding(pack('H*', $code), 'UTF-8', 'UCS-2BE');
}, $value);
}
/**
* @param string $value
*
* @return string
*/
private function replaceUnicodeSequences($value)
{
return preg_replace_callback($this->patterns->getUnicodeEscapePattern(), function ($match) {
$c = hexdec($match[1]);
if (0x80 > ($c %= 0x200000)) {
return chr($c);
}
if (0x800 > $c) {
return chr(0xc0 | $c >> 6) . chr(0x80 | $c & 0x3f);
}
if (0x10000 > $c) {
return chr(0xe0 | $c >> 12) . chr(0x80 | $c >> 6 & 0x3f) . chr(0x80 | $c & 0x3f);
}
}, $value);
}
