PHP Chinese character unicode encoding and decoding

//Encode the content into unicode, the encoded content format: yokau738b (original: yoka king)
function unicode_encode($name)
{
 $name = iconv ('utf-8', 'ucs-2', $name);
 $len = strlen($name);
 $str = '';
 for ($i = 0; $i < $len - 1 ; $i = $i + 2)
 {
 $c = $name[$i];
 $c2 = $name[$i + 1];
 if (ord($c) > 0)
 { / / Two-byte text
 $str .= 'u'.base_convert(ord($c), 10, 16).base_convert(ord($c2), 10, 16);
 }
 else
 {
 $ str .= $c2;
 }
 }
 return $str;
} // (Edited and organized by Scripting School bbs.it-home.org)
// Unicode encoded content Decode, the encoded content format: yokau738b (original: yoka king)
function unicode_decode($name)
{
 // Convert encoding, convert unicode encoding into browseable utf-8 encoding
 $pattern = '/( [w]+)|(\u([w]{4}))/i';
 preg_match_all($pattern, $name, $matches);
 if (!empty($matches))
 {
 $name = '';
 for ($j = 0; $j < count($matches[0]); $j++)
 {
 $str = $matches[0][$j];
 if (strpos($ str, '\u') === 0)
 {
 $code = base_convert(substr($str, 2, 2), 16, 10);
 $code2 = base_convert(substr($str, 4), 16 , 10);
 $c = chr($code).chr($code2);
 $c = iconv('ucs-2', 'utf-8', $c);
 $name .= $c;
 }
 else
 {
 $name .= $str;
 }
 }
 }
 return $name;
}

Test:

echo 'yokau738b -> '.unicode_decode('yokau738b').'';
$name = 'yokawang';
echo '' .unicode_encode($name).'';

Note: The editor of Sina Blog filters all /** */