With the development of the Internet, Web development has become more and more popular. Among them, PHP is a very popular server-side programming language that is often used to develop web applications. The PHP language is not only easy to learn and use, but it is also very flexible and capable of performing various types of programming tasks. When developing web applications, it is often necessary to serialize and deserialize data. Among them, JSON is a popular data exchange format capable of communicating between different applications. In the PHP language, there is a very convenient method to convert a JSON string into an array of PHP objects, which is convenient for us to process in the program. Let's learn this method together.
First, let us understand what JSON is. JSON (JavaScript Object Notation) is a lightweight data exchange format. Data in the JSON data format is represented by key-value pairs, where keys and values are separated by colons (:), and key-value pairs are separated by commas (,). In the JSON data format, curly braces ({}) are used to represent objects, and square brackets ([]) are used to represent arrays. The following is a simple JSON string:
{ "name": "Tom", "age": 18, "hobbies": ["reading", "swimming"] }
In the PHP language, we can use the json_decode function to convert a JSON string into an array of PHP objects. The syntax of this function is as follows:
mixed json_decode(string $json, bool $assoc = false, int $depth = 512, int $options = 0)
Parameter description:
- $json: JSON string that needs to be decoded.
- $assoc: An optional Boolean parameter, the default is false, indicating the return object type. If set to true, an array type is returned.
- $depth: An optional integer parameter indicating the depth of recursive decoding. The default value is 512.
- $options: An optional integer parameter indicating decoding options. The default is 0, which means there are no options.
The following is a simple example that demonstrates how to use the json_decode function to decode a JSON string into an array of PHP objects:
<?php $json_string = '{ "name": "Tom", "age": 18, "hobbies": ["reading", "swimming"] }'; $json_obj = json_decode($json_string); var_dump($json_obj); ?>
The above code will return the following results:
object(stdClass)#1 (3) { ["name"]=> string(3) "Tom" ["age"]=> int(18) ["hobbies"]=> array(2) { [0]=> string(7) "reading" [1]=> string(8) "swimming" } }
In the above example, we first define a JSON string. We then use the json_decode function to decode that string into an array of PHP objects. Finally, we use var_dump to print out the details of the object array. As can be seen from the output, $json_obj is a PHP object that contains all key-value pairs in the JSON string.
If we need to decode a JSON string into a PHP array, we only need to set the second parameter $assoc of the json_decode function to true. The following is the corresponding code example:
<?php $json_string = '{ "name": "Tom", "age": 18, "hobbies": ["reading", "swimming"] }'; $json_arr = json_decode($json_string, true); var_dump($json_arr); ?>
The above code will return the following results:
array(3) { ["name"]=> string(3) "Tom" ["age"]=> int(18) ["hobbies"]=> array(2) { [0]=> string(7) "reading" [1]=> string(8) "swimming" } }
As can be seen from the output results, $json_arr is a PHP array, which contains the JSON string All key-value pairs.
In summary, using the json_decode function can easily convert a JSON string into a PHP object array or PHP array. The use of this function is very simple, you only need to provide the JSON string that needs to be decoded. In actual web applications, we often need to use JSON as a data exchange format. Therefore, it is very important to master the method of using the json_decode function, which can help us better manage and process data.
The above is the detailed content of How to convert json to object array in php. For more information, please follow other related articles on the PHP Chinese website!

This article details implementing message queues in PHP using RabbitMQ and Redis. It compares their architectures (AMQP vs. in-memory), features, and reliability mechanisms (confirmations, transactions, persistence). Best practices for design, error

This article examines current PHP coding standards and best practices, focusing on PSR recommendations (PSR-1, PSR-2, PSR-4, PSR-12). It emphasizes improving code readability and maintainability through consistent styling, meaningful naming, and eff

This article explains PHP's Reflection API, enabling runtime inspection and manipulation of classes, methods, and properties. It details common use cases (documentation generation, ORMs, dependency injection) and cautions against performance overhea

This article details installing and troubleshooting PHP extensions, focusing on PECL. It covers installation steps (finding, downloading/compiling, enabling, restarting the server), troubleshooting techniques (checking logs, verifying installation,

This article explores asynchronous task execution in PHP to enhance web application responsiveness. It details methods like message queues, asynchronous frameworks (ReactPHP, Swoole), and background processes, emphasizing best practices for efficien

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

This article addresses PHP memory optimization. It details techniques like using appropriate data structures, avoiding unnecessary object creation, and employing efficient algorithms. Common memory leak sources (e.g., unclosed connections, global v

This article explores strategies for staying current in the PHP ecosystem. It emphasizes utilizing official channels, community forums, conferences, and open-source contributions. The author highlights best resources for learning new features and a


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

SublimeText3 Chinese version
Chinese version, very easy to use

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

Dreamweaver Mac version
Visual web development tools