php chr with unicode values

问题:

Can I use unicode value of a character (for example U+0021 for !) in php? and convert it to original character in printing (with chr() or other functions)?

回答1:

function replace_unicode_escape_sequence($match) {     return mb_convert_encoding(pack('H*', $match[1]), 'UTF-8', 'UCS-2BE'); } function unicode_chr ($chr) {     $x = explode("+", $chr);     $str = "\u".end($x);     return preg_replace_callback('/\\\\u([0-9a-f]{4})/i', 'replace_unicode_escape_sequence', $str); }  var_dump(unicode_chr("U+0021")); // string(1) "!" 

Adapted from: How to decode Unicode escape sequences like "\u00ed" to proper UTF-8 encoded characters?

文章来源: php chr with unicode values