Description:
------------
Reference: 
string iconv ( string in_charset, string out_charset, string str )

Description:
Iconv converts fine from GB2312 to Big5 if str contains only keyboard characters (e.g. 123abc@#) and GB2312 encoded characters.  However, if str contains Big5 encoded characters, unexpected result would return.  I tried to use append //IGNORE to the end of the out_charset but it didn't work either.

Same problem exists for converting from Big5 to GB2312.

Reproduce code:
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<?
echo iconv("GB2312", "Big5//IGNORE", "Big5: ?????r??; ");
echo iconv("Big5", "GB2312//IGNORE", "GB2312: ????????");
?>

Expected result:
----------------
Big5: ?????r??; GB2312: ????????

Actual result:
--------------
Big5: ????r?y; GB2312: ????????