How to convert json to object array in php

In web development, data in JSON format is often used. In PHP, we can easily use the json_decode function to convert JSON into a PHP array. However, sometimes we need to convert JSON into an array of PHP objects for use. This article will introduce how to use PHP to convert JSON into an object array.

1. Introduction to JSON

JSON (JavaScript Object Notation) is a lightweight data exchange format. Data in JSON format is represented as a key-value pair, which can be simply understood as a JavaScript object format.

The following is an example of JSON format:

{
  "name": "John Doe",
  "age": 30,
  "hobbies": ["reading", "swimming", "playing guitar"]
}

In PHP, we can use the json_encode function to convert PHP arrays into JSON format data:

$data = array(
  "name" => "John Doe",
  "age" => 30,
  "hobbies" => array("reading", "swimming", "playing guitar")
);

$jsonData = json_encode($data);
echo $jsonData;

The output result is:

{
  "name": "John Doe",
  "age": 30,
  "hobbies": ["reading", "swimming", "playing guitar"]
}

2. JSON to object array

The above describes how to convert PHP arrays into JSON format data. Let’s introduce it below. How to convert JSON format data into PHP object array.

In PHP, we can use the json_decode function to convert JSON format data into a PHP array. However, if we need to convert JSON to an array of PHP objects, we need to set it to true in the second parameter of the json_decode function.

The following is an example of JSON format:

[
  {
    "name": "John Doe",
    "age": 30
  },
  {
    "name": "Jane Doe",
    "age": 25
  },
  {
    "name": "Tom Smith",
    "age": 40
  }
]

We can use the json_decode function to convert the above JSON format data into a PHP object array:

$jsonData = '[{"name":"John Doe","age":30},{"name":"Jane Doe","age":25},{"name":"Tom Smith","age":40}]';

$objectArray = json_decode($jsonData, true);

In this way, we convert the JSON format data into a PHP object array. You can view the results through the var_dump function:

var_dump($objectArray);

The output result is:

array(3) {
  [0]=>
  array(2) {
    ["name"]=>
    string(8) "John Doe"
    ["age"]=>
    int(30)
  }
  [1]=>
  array(2) {
    ["name"]=>
    string(8) "Jane Doe"
    ["age"]=>
    int(25)
  }
  [2]=>
  array(2) {
    ["name"]=>
    string(9) "Tom Smith"
    ["age"]=>
    int(40)
  }
}

3. Summary

This article introduces how Convert JSON to object array using PHP. In PHP, we can use the json_decode function to achieve this. It should be noted that when calling the json_decode function, you need to set the second parameter to true, so that the returned object array is the PHP object array, otherwise it is the PHP associative array.

The examples in this article are for readers’ reference only. In actual applications, corresponding code needs to be written according to specific project requirements.

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