Unicode surrogate pairs

问题

Say I have a surrogate pair. For example:

\u306f\u30fc

Is there a function I can use to print the character to the screen?

回答1:

If you want to do it manually:

echo chr(0x30) . chr(0x6f) . chr(0x30) . chr(0xfc);

If you have the string, you could always do:

$callback = function($match) { 
    return chr(hexdec($match[1])) . chr(hexdec($match[2]));
}
preg_replace_callback('#\\\\u([0-9a-f]{2})([0-9a-f]{2})#', $callback, $string);

Or, if php < 5.3

$callback = create_function('$match', 
    'return chr(hexdec($match[1])) . chr(hexdec($match[2]));'
);
preg_replace_callback('#\\\\u([0-9a-f]{2})([0-9a-f]{2})#', $callback, $string);

来源：https://stackoverflow.com/questions/3506120/unicode-surrogate-pairs