string iconv ( string in_charset, string out_charset, string str )
注意：第二个参数，除了可以指定要转化到的编码以外，还可以增加两个后缀：//TRANSLIT 和 //IGNORE，其中 //TRANSLIT 会自动将不能直接转化的字符变成一个或多个近似的字符，//IGNORE 会忽略掉不能转化的字符，而默认效果是从第一个非法字符截断。
手册解释如下：
in_charset
The input charset.
out_charset
The output charset.
If you append the string //TRANSLIT to out_charset transliteration is activated. This means that when a character can't be represented in the target charset, it can be approximated through one or several similarly looking characters. If you append the string //IGNORE, characters that cannot be represented in the target charset are silently discarded. Otherwise, str is cut from the first illegal character and anE_NOTICE is generated.
例子
<?php
$text = "This is the Euro symbol '€'.";
echo 'Original : ', $text, PHP_EOL;
echo 'TRANSLIT : ', iconv("UTF-8", "ISO-8859-1//TRANSLIT", $text), PHP_EOL;
echo 'IGNORE : ', iconv("UTF-8", "ISO-8859-1//IGNORE", $text), PHP_EOL;
echo 'Plain : ', iconv("UTF-8", "ISO-8859-1", $text), PHP_EOL;
?>The above example will output something similar to:
Original : This is the Euro symbol '€'. TRANSLIT : This is the Euro symbol 'EUR'. IGNORE : This is the Euro symbol ''. Plain : Notice: iconv(): Detected an illegal character in input string in .iconv-example.php on line 7 This is the Euro symbol '
如果仍有错误，可以试试mb_convert_encoding 函数