PHP json_encode() function introduction

Using the json_encode() built-in function in php (php > 5.2) can make 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 code

<?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}

json_encode The Chinese in the json_encode function has been 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:

Js code

{"title":"\u8fd9\u91cc\u662f\u4e2d\u6587\u6807\u9898","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 code

<?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);  
?>

It was successful this time, the running results are as follows:

Js code

{"Name":"希亚","Age":"20"}