php中json_encode处理gbk与gb2312中文乱码问题的解决方法_php技巧
本文讲述了php中json_encode处理gbk与gb2312中文乱码问题的解决方法,具体方法如下:
1.json_encode()中文在gbk/gb2312中对中文返回为null
$arr = array ( array ( 'catid' => '4', 'catname' => 'www.jb51.net', 'meta_title' => '脚本之家' ) ); echo json_encode($arr);
运行结果:
[{"catid":"4","catname":"www.jb51.net","meta_title":null}]
看一了吗"meta_title":null 他本来是有一个值的为"脚本之家"了,这个我们查了一下原理是json_encode只支持uft-8编码,我们转换一下
<?php $data="JSON中文"; $newData=iconv("GB2312″,"UTF-8//IGNORE",$data); echo $newData; //ignore的意思是忽略转换时的错误,如果没有ignore参数,所有该字符后面的字符都不会被保存。 //或是("GB2312″,"UTF-8″,$data); ?>
2.后台PHP页面(页面编码为UTF-8或者已经把字符转为UTF-8)使用json_encode将PHP中的array数组转为JSON字符串。例如:
<?php $testJSON=array('name'=>'中文字符串','value'=>'test'); echo json_encode($testJSON); ?>
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,输出结果的时候再用函数urldecode()转回来。具体如下:
<?php $testJSON=array('name'=>'中文字符串','value'=>'test'); //echo json_encode($testJSON); foreach ( $testJSON as $key => $value ) { $testJSON[$key] = urlencode ( $value ); } echo urldecode ( json_encode ( $testJSON ) ); ?>
查看输出结果为:
{"name":"中文字符串","value":"test"}
总结:json_encode函数只能处理uft8字符串,如果是中文估计是对字节处理不好,因为中文gbk与uft长度是不一样的,这个也不做深入介绍了。

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