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decode utf8 charset

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  1. function charset_decode_utf_8($string) {
  2.       /* Only do the slow convert if there are 8-bit characters */
  3.     /* avoid using 0xA0 (240) in ereg ranges. RH73 does not like that */
  4.     if (! ereg("[200-237]", $string) and ! ereg("[241-377]", $string))
  5.         return $string;
  6.  
  7.     // decode three byte unicode characters
  8.     $string = preg_replace("/([340-357])([200-277])([200-277])/e",       
  9.     "'&#'.((ord('\1')-224)*4096 + (ord('\2')-128)*64 + (ord('\3')-128)).';'",   
  10.     $string);
  11.  
  12.     // decode two byte unicode characters
  13.     $string = preg_replace("/([300-337])([200-277])/e",
  14.     "'&#'.((ord('\1')-192)*64+(ord('\2')-128)).';'",
  15.     $string);
  16.  
  17.     return $string;
  18. }

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