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Unicode·ûºÅ·¶Î§           | UTF-8±àÂ뷽ʽ
u0000 0000 - u0000 007F   | 0xxxxxxx
u0000 0080 - u0000 07FF   | 110xxxxx 10xxxxxx
u0000 0800 - u0000 FFFF   | 1110xxxx 10xxxxxx 10xxxxxx
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/*
 * ²ÎÊý $c ÊÇunicode×Ö·û±àÂëµÄintÀàÐÍÊýÖµ£¬Èç¹ûÊÇÓöþ½øÖƶÁÈ¡µÄÊý¾Ý£¬ÔÚphpÖÐͨ³£ÒªÓà hexdec(bin2hex( $bin_unichar )) ÕâÑùת»»
 */
function uni2utf8( $c )
{
  if ($c < 0x80)
  {
        $utf8char = chr($c);
  }
  else if ($c < 0x800)
  {
        $utf8char = chr(0xC0 | $c >> 0x06).chr(0x80 | $c & 0x3F);
  }
  else if ($c < 0x10000)
  {
        $utf8char = chr(0xE0 | $c >> 0x0C).chr(0x80 | $c >> 0x06 & 0x3F).chr(0x80 | $c & 0x3F);
  }
  //ÒòΪUCS-2Ö»ÓÐÁ½×Ö½Ú£¬ËùÒÔºóÃæµÄÇé¿öÊDz»¿ÉÄܳöÏֵģ¬ÕâÀïÖ»ÊÇ˵Ã÷unicode HTMLʵÌå±àÂëµ


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