PHP json_encode() function introduction-PHP Tutorial-php.cn

PHP json_encode() function introduction

巴扎黑

Release： 2023-03-02 15:28:02

Original

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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;  
?>

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The program running results are as follows:

{"Name":null,"Age":20}

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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);  
?>

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The running result of this program is:

Js code

{"title":"\u8fd9\u91cc\u662f\u4e2d\u6587\u6807\u9898","body":"abcd..."}

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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);  
?>

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

Js code

{"Name":"希亚","Age":"20"}

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