unicode与utf8相互转换

zipalpha

1. function unicode_encode($name)
   
2. {
   
3.     $name = iconv('UTF-8', 'UCS-2', $name);
   
4.     $len = strlen($name);
   
5.     $str = '';
   
6.     for ($i = 0; $i < $len - 1; $i = $i + 2) {
   
7.         $c = $name[$i];
   
8.         $c2 = $name[$i + 1];
   
9.         if (ord($c) > 0) { // 两个字节的文字
   
10.             $str .= '\u' . base_convert(ord($c), 10, 16) . base_convert(ord($c2), 10, 16);
    
11.         } else {
    
12.             $str .= $c2;
    
13.         }
    
14.     }
    
15.     return $str;
    
16. }
    
17. 
    
18. function unicode_decode($name)
    
19. {
    
20.     // 转换编码，将Unicode编码转换成可以浏览的utf-8编码
    
21.     $pattern = '/([\w]+)|(\\\u([\w]{4}))/i';
    
22.     preg_match_all($pattern, $name, $matches);
    
23.     if (!empty($matches)) {
    
24.         $name = '';
    
25.         for ($j = 0; $j < count($matches[0]); $j++) {
    
26.             $str = $matches[0][$j];
    
27.             if (strpos($str, '\\u') === 0) {
    
28.                 $code = base_convert(substr($str, 2, 2), 16, 10);
    
29.                 $code2 = base_convert(substr($str, 4), 16, 10);
    
30.                 $c = chr($code) . chr($code2);
    
31.                 $c = iconv('UCS-2', 'UTF-8', $c);
    
32.                 $name .= $c;
    
33.             } else {
    
34.                 $name .= $str;
    
35.             }
    
36.         }
    
37.     }
    
38.     return $name;
    
39. }