PHP將PCRE unicode序列轉換爲正常utf-8字符串

Question

PHP中是否可以將unicode PCRE序列（如\x{2f},\x{3251}）轉換爲字符串？

Answer 1

使用html_entity_decode其可能

function cb($a){ 
     $num = $a[1]; 
     $dec = hexdec($num); 
     return "&#$dec;"; 
} 
$ent = preg_replace_callback("/\\\\x\{([\da-z]+)\}/i", 'cb', "\x{2f}, \x{3251}"); 
$ustr = html_entity_decode($ent, ENT_NOQUOTES, 'UTF-8'); 

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