Creating a UTF-8 string from hexadecimal code

Question

In C++, it's possible create a UTF-8 string using this kind of notation: "\uD840\uDC50".

However this doesn't work in PHP. Is there a similar notation?

If not, is there any built-in way to create a UTF-8 string knowing its Unicode code point?

php.net/manual/en/function.chr.php#88611

Passerby
– Passerby

2013-04-19 06:58:05 +00:00
Commented Apr 19, 2013 at 6:58 — Passerby
– Passerby, Commented Apr 19, 2013 at 6:58

laurent · Accepted Answer · 2013-04-19 06:57:41Z

12

I've ended up implementing it like this:

$utf8 = html_entity_decode("&#x4E00;", ENT_COMPAT, 'UTF-8');

answered Apr 19, 2013 at 6:57

laurent

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2 Comments

E Ciotti Over a year ago

use ENT_QUOTES | ENT_COMPAT to convert quotes as well

digitaldonkey Over a year ago

This has limitations and will not work with all UTF-8 chars, as not all hex chars are suported in HTML standard. See ascii.cl/htmlcodes.htm ("not defined in HTML 4 standard")

Jiri Zachar · Accepted Answer · 2015-02-23 10:29:13Z

3

function hexToString($str){return chr(hexdec(substr($str, 2)));}
$result = preg_replace_callback("/(\\\\x..)/isU", function($m) { return hexToString($m[0] ); }, $str);

answered Feb 23, 2015 at 10:29

Jiri Zachar

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