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?

http://www.php.net/manual/en/function.chr.php#88611 – Passerby Apr 19 '13 at 06:58 — Passerby, Apr 19 '13 at 06:58

score 10 · Accepted Answer · answered Apr 19 '13 at 06:57

10

I've ended up implementing it like this:

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

answered Apr 19 '13 at 06:57

laurent

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use ENT_QUOTES | ENT_COMPAT to convert quotes as well – E Ciotti Mar 26 '16 at 21:23
This has limitations and will not work with all UTF-8 chars, as not all hex chars are suported in HTML standard. See https://www.ascii.cl/htmlcodes.htm ("not defined in HTML 4 standard") – digitaldonkey Mar 20 '18 at 10:27

score 2 · Answer 2 · answered Feb 23 '15 at 10:29

2

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 '15 at 10:29

Jiri Zachar

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Creating a UTF-8 string from hexadecimal code

2 Answers2