`function unicode_decode($str){ //unicode转中文 return preg_replace_callback("#\u([0-9a-f]{4})#i", function ($r) {return iconv('UCS-2BE', 'UTF-8', pack('H4', $r[1]));}, $str); } echo unicode_decode('\u6D4B\u8BD5\u4E00\u4E0B'); //运行结果：测试一下`