Solution to json_encode in php to deal with gbk and gb2312 Chinese garbled problems, _PHP tutorial

Solution to json_encode in php to deal with gbk and gb2312 Chinese garbled problems,

This article describes the solution to the problem of gbk and gb2312 Chinese garbled characters in json_encode in php. The specific method is as follows:

1.json_encode() Chinese returns null for Chinese in gbk/gb2312

$arr = array ( 
 array ( 
   'catid' => '4', 
   'catname' => 'www.jb51.net', 
   'meta_title' => '帮客之家' 
  )
);
 
echo json_encode($arr);

Run result:

[{"catid":"4","catname":"www.jb51.net","meta_title":null}]

Did you take a look at "meta_title":null? It originally had a value of "Bangkejia". We checked this and the principle is that json_encode only supports uft-8 encoding. Let's convert it

<&#63;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);
&#63;>

2. The background PHP page (the page is encoded as UTF-8 or the characters have been converted to UTF-8) uses json_encode to convert the array array in PHP into a JSON string. For example:

<&#63;php
$testJSON=array('name'=>'中文字符串','value'=>'test');
echo json_encode($testJSON);
&#63;>

View the output result:

{"name":"u4e2du6587u5b57u7b26u4e32″,"value":"test"}

It can be seen that even if UTF8-encoded characters are used, Chinese garbled characters appear when using json_encode. The solution is to process the characters with the function urlencode() before using json_encode, then json_encode, and then use the function urldecode() to convert them back when outputting the result. The details are as follows:

<&#63;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 ) );
&#63;>

View the output result:

{"name":"中文字符串","value":"test"}

Summary: The json_encode function can only process uft8 strings. If it is Chinese, it probably does not handle bytes well, because the lengths of Chinese gbk and uft are different . This will not be introduced in depth. .