删除json对象的null值 [英] strip null values of json object

问题描述

我所有的AJAX请求都是json格式，正在使用javascript进行解析.

All my AJAX requests are in json format which are being parsed in javascript.

如何避免在HTML页面中显示空值而无需在JavaScript中为每个json值编写if语句?

How can i prevent null values being displayed in an HTML page without needing to write an if-statement in javascript for each json value?

还是我应该编写一个自定义PHP函数以将数组编码为json而不是使用json_encode()以便它不显示"null"?

Or should i write a custom PHP function to encode an array to json instead of using json_encode() so it doesn't display 'null' ?

推荐答案

在使用PHP的服务器端，

In server side with PHP,

您可以在 array_filter .json-encode.php> json_encode .

You can use array_filter before json_encode.

array_filter会删除条目数组的 null 元素，例如:

array_filter without second argument removes null elements of entry array, example :

$object= array(
             0 => 'foo',
             1 => false,
             2 => -1,
             3 => null,
             4 => ''
          );

$object = (object) array_filter((array) $object);
$result = json_encode($object);

$result包含:

{"0":"foo","2":-1}

如您所见， null 元素被删除.

As you see, the null elements are removed.

这篇关于删除json对象的null值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！