Solution to the problem that php json Chinese encoding is null

I used the json_encode function today and found that Chinese was actually null.

Cause analysis: When using the json_encode function, you should use utf-8 encoding. My page uses gbk.

Solution: Use the iconv('gbk','utf8') function before the json_encode function. The field obtained by function

function gbk2utf8($data)
{
 if(is_array($data))
  {
    return array_map('gbk2utf8', $data);
  }
 return iconv('gbk','utf-8',$data);
}
   
//以下是找的另一种方法

PHP from the database is in Chinese. I want to use json_encode() to return it to the front desk, but json_encode is null after encoding Chinese.

Using the json_encode() built-in function in php (php > 5.2) can be used so that the data in php can be transferred and used well with other languages.

The function of this function is to convert numerical values ​​into json data storage format.

<?php
$arr = array
    (
     &#39;Name&#39;=>&#39;希亚&#39;,
     &#39;Age&#39;=>20
    );
 
$jsonencode = json_encode($arr);
echo $jsonencode;
?>

The program running results are as follows:
{"Name":null,"Age":20}
The Chinese in the json_encode function is encoded as null. I Googled it and it is very simple. In order to closely integrate with the front end, Json only Supports utf-8 encoding. I think the reason is that the front-end Javascript is also utf-8.

<?php
$array = array
    (
        &#39;title&#39;=>iconv(&#39;gb2312&#39;,&#39;utf-8&#39;,&#39;这里是中文标题&#39;),
        &#39;body&#39;=>&#39;abcd...&#39;
    );
 
echo json_encode($array);
?>

The running result of this program is:
{"title":"u8fd9u91ccu662fu4e2du6587u6807u9898","body":"abcd..."}
All Chinese characters in the array are missing or u2353 etc. appear after json_encode.
The solution is to use the urlencode() function to process the following. Before json_encode, use urlencode() to process all the contents of all arrays, then use json_encode() to convert them into json strings, and finally use urldecode() to encode them The Chinese is transferred back.

<?php
/**************************************************************
 *
 *  使用特定function对数组中所有元素做处理
 *  @param  string  &$array     要处理的字符串
 *  @param  string  $function   要执行的函数
 *  @return boolean $apply_to_keys_also     是否也应用到key上
 *  @access public
 *
 *************************************************************/
function arrayRecursive(&$array, $function, $apply_to_keys_also = false)
{
  static $recursive_counter = 0;
  if (++$recursive_counter > 1000) {
    die(&#39;possible deep recursion attack&#39;);
  }
  foreach ($array as $key => $value) {
    if (is_array($value)) {
      arrayRecursive($array[$key], $function, $apply_to_keys_also);
    } else {
      $array[$key] = $function($value);
    }
  
    if ($apply_to_keys_also && is_string($key)) {
      $new_key = $function($key);
      if ($new_key != $key) {
        $array[$new_key] = $array[$key];
        unset($array[$key]);
      }
    }
  }
  $recursive_counter--;
}
  
/**************************************************************
 *
 *  将数组转换为JSON字符串（兼容中文）
 *  @param  array   $array      要转换的数组
 *  @return string      转换得到的json字符串
 *  @access public
 *
 *************************************************************/
function JSON($array) {
    arrayRecursive($array, &#39;urlencode&#39;, true);
    $json = json_encode($array);
    return urldecode($json);
}
 
$array = array
    (
     &#39;Name&#39;=>&#39;希亚&#39;,
     &#39;Age&#39;=>20
    );
 
 
echo JSON($array);
?>

This time it was successful, the running results are as follows:
{"Name":"Xia","Age":"20"}