iconv函数提示错误，求解

[a7758521haha]

在网上看到json的文章，打算测试一下，结果，出现错误，先附上代码：

<?php
@header("Content-type:text/html;charset=GB2312");
$arr = array ('name'=>"贾朝藤",'age'=>19,'sex'=>"男",'add'=>"中国石家庄");
echo json_encode($arr);
echo "<br/>";
$name = iconv("GBK","UTF-8","贾朝藤");
$sex = iconv("GBK","UTF-8","男");
$add = iconv("GBK","UTF-8","中国石家庄");
$arr = array ('name'=>"$name",'age'=>19,'sex'=>"$sex",'add'=>"$add");
echo $str=json_encode($arr);
?>
  

错误信息如下：

{"name":"\u8d3e\u671d\u85e4","age":19,"sex":"\u7537","add":"\u4e2d\u56fd\u77f3\u5bb6\u5e84"}

Notice: iconv() [function.iconv]: Detected an illegal character in input string in D:\wamp\www\ajax\js_php.php on line 6

Notice: iconv() [function.iconv]: Detected an illegal character in input string in D:\wamp\www\ajax\js_php.php on line 7

Notice: iconv() [function.iconv]: Detected an illegal character in input string in D:\wamp\www\ajax\js_php.php on line 8
{"name":"\u7490\u70ac","age":19,"sex":"","add":"\u6d93"}

之后百度，谷歌了一番，得到两个方法：
1.把gb2312换为gbk，同样出错，错误信息如下

{"name":"\u8d3e\u671d\u85e4","age":19,"sex":"\u7537","add":"\u4e2d\u56fd\u77f3\u5bb6\u5e84"}

Notice: iconv() [function.iconv]: Detected an incomplete multibyte character in input string in D:\wamp\www\ajax\js_php.php on line 6

Notice: iconv() [function.iconv]: Detected an incomplete multibyte character in input string in D:\wamp\www\ajax\js_php.php on line 7

Notice: iconv() [function.iconv]: Detected an illegal character in input string in D:\wamp\www\ajax\js_php.php on line 8
{"name":"\u7490\u70ac\u6e5e\u9498","age":19,"sex":"\u9422","add":"\u6d93"}

2.在UTF-8后加//IGNORE，加上后提示如下：

{"name":"\u8d3e\u671d\u85e4","age":19,"sex":"\u7537","add":"\u4e2d\u56fd\u77f3\u5bb6\u5e84"}

Notice: iconv() [function.iconv]: Detected an incomplete multibyte character in input string in D:\wamp\www\ajax\js_php.php on line 6

Notice: iconv() [function.iconv]: Detected an incomplete multibyte character in input string in D:\wamp\www\ajax\js_php.php on line 7
{"name":"\u7490\u70ac\u6e5e\u9498","age":19,"sex":"\u9422","add":"\u6d93\u9365\u754c\u7176\u7039\u8dfa\u7c1e"}

希望大家帮忙解决一下问题，谢谢！

[chlinux]

我以前也是经常用这个函数的，问题多多，后来我放弃使用这个函数了，用这个函数吧，会让你很快乐，只是需要编译时加一个参数--enable-mbstring

string mb_convert_encoding ( string $str , string $to_encoding [, mixed $from_encoding ] )

[a7758521haha]

[Quote=引用 1 楼 chlinux 的回复:]

我以前也是经常用这个函数的，问题多多，后来我放弃使用这个函数了，用这个函数吧，会让你很快乐，只是需要编译时加一个参数--enable-mbstring

string mb_convert_encoding ( string $str , string $to_encoding [, mixed $from_encoding ] )
[/Quote]
多谢咯，编译时加参数，你在linux下写php？

[ImN1]

那是因为你的php文件本身是utf-8编码的

你把它转为ansi这个问题就不存在

[kyzy_yy_pm]

[Quote=引用 3 楼 snmr_com 的回复:]

那是因为你的php文件本身是utf-8编码的
[/Quote]
+

[a7758521haha]

[Quote=引用 3 楼 snmr_com 的回复:]

那是因为你的php文件本身是utf-8编码的

你把它转为ansi这个问题就不存在
[/Quote]
的确，问题解决了，感谢您的帮助！

[a7758521haha]

[Quote=引用 4 楼 kyzy_yy_pm 的回复:]

引用 3 楼 snmr_com 的回复:

那是因为你的php文件本身是utf-8编码的

+
[/Quote]
的确，问题解决了，感谢您的帮助！