Community Learn Tools Library Leisure
search
English
Home > Backend Development > PHP Tutorial > json_encode 后转向数组 为什么根据键名取不到值呢

json_encode 后转向数组 为什么根据键名取不到值呢

WBOY
Release： 2016-06-13 13:10:04
Original
990 people have browsed it

json_encode 后转为数组 为什么根据键名取不到值呢？
问个小白的问题。。

PHP code
<!--

Code highlighting produced by Actipro CodeHighlighter (freeware)
http://www.CodeHighlighter.com/

-->$arr = array(34=>1,2=>3);
$str = json_encode($arr);
echo $str;
$arr2 = (array)json_decode($str);
echo '<pre class="brush:php;toolbar:false">';
print_r($arr2);
echo '
Copy after login
'; var_dump($arr2['2']);

为什么索引数组转化的JSON encode 过来后 按照键值取取不到值呢?
我想取到$arr2['2']的值 要怎么取呢？


------解决方案--------------------
$arr2 = json_decode($str, 1);

------解决方案--------------------
默认转成对象。
------解决方案--------------------
如果想要强制生成PHP关联数组，json_decode()需要加一个参数true：
Related labels：
arr decode encode json str
source：php.cn
Previous article： php怎么实现公司结构图（树形结构） Next article： 怎么将input标签的值存入COOKIE并保存1年
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
The entity warehouse extends JpaRepository<Entity, Id> and JpaSpecificationExecutor<Entity>, and EntitySpec extends Specification<Entity> This is my endpoint http://localhost:8080/country/all replies are ok for all countries and...
From 2024-04-06 17:11:03
0
1
421
How to change JSON nested array properties "project_id" and "project_name" 问题：[{"project_id":1,"project_name":"CDP","role":&q...
From 2024-04-06 15:39:51
0
1
466
An error was encountered while trying to retrieve the latest version of a package from search.maven.org "Error: Unable to retrieve data from Maven repository" while retrieving latest v...
From 2024-04-05 12:11:23
0
1
1471
Add the Endpoint _header attribute to the JSON response object I'm testing pulling data from a remote endpoint service (npoint.io). When I get back the r...
From 2024-04-05 10:35:39
0
1
1376
json added to MySQL How to add new element to json variable in mySQL from this: value=['123'] do this: value=[...
From 2024-04-04 19:17:30
0
1
352
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template