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php中json_encode中文字符乱码解决办法

Jun 13, 2016 am 09:56 AM
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大致的解决办法是保证在使用JSON处理的时候字符是以UTF8编码的。具体我们可以把数据库编码和页面编码都改为UTF8。当然喜欢用gbk编码的话,可以在进行JSON处理前,把字符转为UTF8形式

一、json_encode()

这个是一个对变量进行 JSON 编码常用的函数,但是当文本的格式不是utf-8时,中文的转码会出现一些问题,比如文本为gb2312的时候


示例

 代码如下 复制代码

$jsonText = array (
 0 => array (
  'id' => '1',
  'name' => '文本1'
 ),
 1 => array (
  'id' => '2',
  'name' => '文本2'
  )
) ;
 
echo json_encode($jsonText);
//[{"id":"1","name":""},{"id":"2","name":""}]
//可以看到汉字没有被转义都为空“”,这是因为json仅仅转义encoding编码(类似于:%B0%AE),故上面语句应该先转换编码
?>

解决办法

 代码如下 复制代码

foreach ($jsonText as $key=>$value)
{
 $jsonText[$key]['name'] = urlencode($value['name']);
}
echo json_encode($jsonText);
?>
客户端处理

用上面的代码js会报错 说编码不符合标准

原因是因为js 中decodeURI 仅仅支持utf8 转码。所以 ,PHP json_encode函数的代码应该为下面的代码

 代码如下 复制代码

foreach ($jsonText as $key=>$value)
{
 $jsonText[$key]['name'] = urlencode(iconv('gb2312', 'utf-8',$value['name']));
}
echo json_encode($json);
?>

查看输出结果为:

{“name”:”u4e2du6587u5b57u7b26u4e32″,”value”:”test”}

可见即使用UTF8编码的字符,使用json_encode也出现了中文乱码。解决办法是在使用json_encode之前把字符用函数urlencode()处理一下,然后再json_encode,输出结果的时候在用函数urldecode()转回来。具体如下:

 代码如下 复制代码

    $testJSON=array('name'=>'中文字符串','value'=>'test');
    //echo json_encode($testJSON);
    foreach ( $testJSON as $key => $value ) {
  $testJSON[$key] = urlencode ( $value );
    }
    echo urldecode ( json_encode ( $testJSON ) );
?>

查看输出结果为:

 代码如下 复制代码
{“name”:”中文字符串”,”value”:”test”}

到此,成功地输出了中文字符。随意使用json_encode吧。这样子在PHP后台输出的JSON字符串在前台javascript中Ajax接收后eval出来也不会出现中文乱码,因为js在处理JSON格式数据是也是以UTF8的形式进行的,与PHP类似,故接收PHP页面的JSON字符串不会出现问题。

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