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php中输出中文字符乱码

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Release： 2016-06-23 14:26:57
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foreach乱码

问题如下：
$load_list 是一个二维数组，将其中的user_name值取出前两个字符，后面用星号代替，但是遇到中文字符就出现乱码，设置header()函数，也没用，求解决办法，谢谢！
foreach($load_list as $k=>&$v){
 $temp=&$v['user_name'];

 for($i=0,$len=strlen($temp);$i if($i>1){
  $temp[$i]='*';
}
 }
}

截图如下：

回复讨论(解决方案)

你的代码只适用于单字节字符串，没有考虑到
中文 gbk 一个字符 2 个字节
中文 utf-8 一个字符 3 个字节

试试mb_substr函数

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php中输出中文字符乱码
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