PHP:从JSON数组中提取值 [英] PHP: Extract value from JSON array

问题描述

我有一个API，该API通过JSON从发布中获取参数，并且我想为键值对提取数组中的值之一.但是，尽管进行了很多尝试，我还是无法使它正常工作.

I have an API that takes parameters from a post through JSON and I want to extract one of the values in an array for a key value pair. However, despite many attempts, I can't get it to work.

这是我的代码:

$json = file_get_contents('php://input'); 
$request = json_decode($json, true);
$parameters = $request["result"]["parameters"];

当我将$parameters登录到文本文件时，其记录为

When I log $parameters to a text file, it log as

 {"numberofhits":"5"}

但是，我获取值5的努力没有用:

However, my efforts to capture the value 5 are not working:

$numhits = $json['numberofhits']; logs as empty.

也是:

$numhits = $parameters->numberofhits;

如何在变量中捕获值5?

How can I capture the value 5 in a variable?

推荐答案

在$json以上的代码中，是字符串而不是json对象，您应使用$request来访问点击数

From your code above $json is a string and not a json object, your should use $request to access numberofhits

$request['numberofhits']

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