How to adjust and obtain json data thinkphp

In Web development, JSON (JavaScript Object Notation) has become a common data interaction format and is widely used. In PHP development, thinkphp is a widely used MVC framework, and its ability to process JSON data is also very powerful. This article will introduce how to use thinkphp to call and obtain JSON data.

1. Understanding JSON data

Before understanding how to call to obtain JSON data, we need to first understand what the JSON data format looks like. In JavaScript, JSON data is basically composed of some key-value pairs, and in most cases appears in the form of strings. For example:

{

"name" : "Tom",
"age" : 25,
"address" : {
    "city" : "Shanghai",
    "street" : "Nanjing Road",
    "postcode" : 200001
}

}

This is a common JSON format example, which contains an object containing three key-value pairs, except Except age is a number, the rest are strings. This JSON object contains another object whose key-value pairs are also strings and numbers. Of course, a JSON data can be complex and even contain arrays and more nested objects.

2. Thinkphp processes JSON data

In the thinkphp framework, you need to use a class called Json, which is located in the thinkesponseJson.php file. Using this class to process JSON data is very simple, and it also provides many useful methods. In thinkphp, you can get the Json object through the following code:

use thinkesponseJson;

$Json = new Json();

Through this object, we can use some Methods convert data into JSON format for easy delivery and parsing in web applications.

3. Obtaining JSON data

Obtaining JSON data in the thinkphp framework can generally be divided into two parts. First, obtain the data from the remote, and then parse it locally.

1. Get JSON data from remote

The most common way to get JSON data is through HTTP request. Using thinkphp's built-in curl library, we can easily make HTTP requests, as follows:

use think acadeHttp;

$data = Http::get('https://example.com /api/getjsondata');

Here we use the get method to initiate an HTTP GET request to obtain JSON data from the remote. Among them, https://example.com/api/getjsondata is an example and represents the URL address where you need to obtain the data. Of course, you can also use other HTTP methods such as post to obtain JSON data.

After obtaining the data, we usually need to parse it before it can be used in a web application. thinkphp provides many JSON parsing libraries, including PHP's own json_decode() function, as well as other third-party libraries, such as ZendJsonJson, etc. Here we take the json_decode() function that comes with PHP as an example:

$json_data = Http::get('https://example.com/api/getjsondata');
$data = json_decode( $json_data, true);

Here we use the json_decode() function to convert JSON data into a PHP array for use in web applications. Note that we set the second parameter to true, which means that the returned array is an associative array rather than an object, which is usually more convenient to work with.

2. Get JSON data locally

Sometimes, you need to get JSON data stored locally, which is usually read from a file. In thinkphp, it is very easy to use the File class to read data from a file, as follows:

use think acadeFilesystem;

$data = Filesystem::readFile('path/to/jsonfile.json ');

Here we use the File class to read the contents of a JSON file, and its path is path/to/jsonfile.json. Note that after reading is completed, you need to use the json_decode() function to parse the string into a PHP array for use in a web application.

4. Summary

In this article, we introduced how to use the thinkphp framework to process JSON data. By using Json class we can easily convert PHP array to JSON string and JSON string to PHP array. In this way, we can use JSON data in web applications to achieve data interaction and transfer. At the same time, we also introduced the method of obtaining JSON data from the remote and reading it from the local, which will be very useful for actual development of applications.

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