Home Backend Development PHP Problem How does php receive json array and convert array

How does php receive json array and convert array

Apr 18, 2023 pm 04:00 PM

When developing web applications, it is often necessary to use the JSON data format to transmit and receive data. As a PHP developer, we often need to convert JSON data passed from the front end into PHP arrays for processing. In this post, we will teach you how to convert a received JSON array into a PHP array using PHP.

  1. Receive JSON data

To convert JSON data into a PHP array, you first need to receive JSON data. We can receive JSON data using $_POST or $_GET array in PHP.

For example, if the front end sends the following JSON data via POST request:

{
    "name": "张三",
    "age": 25,
    "address": "北京市朝阳区"
}
Copy after login

Then in PHP, we can use the following code to receive the JSON data and store it in the variable $json:

$json = $_POST['json']; // 假设json参数是前端发送的JSON数据
Copy after login
  1. Convert JSON data to PHP array

After receiving the JSON data, we need to convert it to a PHP array. PHP provides the built-in function json_decode() to do this. The syntax of this function is:

mixed json_decode(string $json, bool $assoc = false, int $depth = 512, int $options = 0)
Copy after login

where $json is the JSON data to be decoded, $assoc is an optional Boolean value used to indicate whether to convert the JSON object into an associative array (default is false, That is, converting JSON objects into standard objects), $depth is an optional integer used to specify the maximum depth of the decoder's recursive structure (default is 512), $options is an optional integer used to specify the decoder behavior Various options (default 0).

We can use the following code to convert the received JSON data into a PHP array:

$data = json_decode($json, true); // 将JSON数据转换为关联数组
Copy after login

Note that if the $assoc parameter is not set to true, the json_decode() function will return a standard object instead of an array. Therefore, be sure to remember to set this parameter to true when calling this function.

  1. Processing PHP Arrays

Once the JSON data is successfully converted into a PHP array, we can perform any operation on it. For example, we can output the values ​​of some array elements:

echo $data['name'];     // 将输出"张三"
echo $data['age'];      // 将输出25
echo $data['address'];  // 将输出"北京市朝阳区"
Copy after login

Or we can do a loop over the array:

foreach ($data as $key => $value) {
    echo $key . ': ' . $value . '<br />';
}
Copy after login

Anyway, once the JSON data is converted to a PHP array, we can process it like It is operated on like any other PHP array.

To summarize, this article details how to convert a received JSON array into a PHP array. How you use this technique will depend on the specific needs of the application you are developing. However, this tutorial provides the basic knowledge developers need so that they can use it according to their needs.

The above is the detailed content of How does php receive json array and convert array. For more information, please follow other related articles on the PHP Chinese website!

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

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
Will R.E.P.O. Have Crossplay?
1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8 JIT (Just-In-Time) Compilation: How it improves performance. PHP 8 JIT (Just-In-Time) Compilation: How it improves performance. Mar 25, 2025 am 10:37 AM

PHP 8's JIT compilation enhances performance by compiling frequently executed code into machine code, benefiting applications with heavy computations and reducing execution times.

OWASP Top 10 PHP: Describe and mitigate common vulnerabilities. OWASP Top 10 PHP: Describe and mitigate common vulnerabilities. Mar 26, 2025 pm 04:13 PM

The article discusses OWASP Top 10 vulnerabilities in PHP and mitigation strategies. Key issues include injection, broken authentication, and XSS, with recommended tools for monitoring and securing PHP applications.

PHP Encryption: Symmetric vs. asymmetric encryption. PHP Encryption: Symmetric vs. asymmetric encryption. Mar 25, 2025 pm 03:12 PM

The article discusses symmetric and asymmetric encryption in PHP, comparing their suitability, performance, and security differences. Symmetric encryption is faster and suited for bulk data, while asymmetric is used for secure key exchange.

PHP Secure File Uploads: Preventing file-related vulnerabilities. PHP Secure File Uploads: Preventing file-related vulnerabilities. Mar 26, 2025 pm 04:18 PM

The article discusses securing PHP file uploads to prevent vulnerabilities like code injection. It focuses on file type validation, secure storage, and error handling to enhance application security.

PHP Authentication & Authorization: Secure implementation. PHP Authentication & Authorization: Secure implementation. Mar 25, 2025 pm 03:06 PM

The article discusses implementing robust authentication and authorization in PHP to prevent unauthorized access, detailing best practices and recommending security-enhancing tools.

PHP CSRF Protection: How to prevent CSRF attacks. PHP CSRF Protection: How to prevent CSRF attacks. Mar 25, 2025 pm 03:05 PM

The article discusses strategies to prevent CSRF attacks in PHP, including using CSRF tokens, Same-Site cookies, and proper session management.

How do you retrieve data from a database using PHP? How do you retrieve data from a database using PHP? Mar 20, 2025 pm 04:57 PM

Article discusses retrieving data from databases using PHP, covering steps, security measures, optimization techniques, and common errors with solutions.Character count: 159

What is the purpose of prepared statements in PHP? What is the purpose of prepared statements in PHP? Mar 20, 2025 pm 04:47 PM

Prepared statements in PHP enhance database security and efficiency by preventing SQL injection and improving query performance through compilation and reuse.Character count: 159

See all articles