How to convert json array to php

Introduction:

JSON (JavaScript Object Notation) is a lightweight data exchange format that is widely used because of its characteristics of distribution, legibility, and easy parsing. PHP is an open source server-side scripting language usually used for the development of dynamic websites. This article will introduce how to convert JSON array into PHP format.

Text:

JSON array is a collection of key-value pairs, such as {"name":"John", "age":30, "city":"New York"} . In PHP, you can use the json_decode() function to convert a JSON string into a PHP array. The following is a simple example:

$json = '{"name":"John", "age":30, "city":"New York"}';
$phpArray = json_decode($json, true); // 第二个参数为true表示返回数组类型
print_r($phpArray);

The output is:

Array
(
    [name] => John
    [age] => 30
    [city] => New York
)

In the above example, $json is a JSON string, which is converted into $ using the json_decode() function phpArray array, and use the print_r() function to output the contents of the $phpArray array. Among them, the second parameter is true to return the array type, otherwise it returns the object type. If the second parameter is not specified, the object type is returned by default.

If there are other JSON arrays or JSON objects nested in the JSON array, you can use recursive method to convert it into a PHP array. The following is an example:

$json = '{
    "name": "John",
    "age": 30,
    "city": "New York",
    "job": {
        "title": "Software Engineer",
        "company": "Google"
    },
    "languages": ["PHP", "JavaScript", "Python"]
}';
$phpArray = json_decode($json, true);

function convertJson($json)
{
    $result = array();
    foreach ($json as $key => $value) {
        if (is_array($value) || is_object($value)) {
            $result[$key] = convertJson((array)$value);
        } else {
            $result[$key] = $value;
        }
    }
    return $result;
}

$phpArray = convertJson($phpArray);
print_r($phpArray);

The output result is:

Array
(
    [name] => John
    [age] => 30
    [city] => New York
    [job] => Array
        (
            [title] => Software Engineer
            [company] => Google
        )

    [languages] => Array
        (
            [0] => PHP
            [1] => JavaScript
            [2] => Python
        )

)

In the above example, the convertJson() function is defined to convert other JSON arrays or JSON objects nested in the JSON array into PHP array. Use a foreach loop to iterate through each element in the JSON array. If the element is an array or object, recursively call the convertJson() function to convert it into a PHP array and store the result in the $result array. Otherwise, store the element directly. into the $result array. Finally returns the $result array.

Summary:

This article introduces how to convert JSON array into PHP format. Use the json_decode() function to convert a JSON string into a PHP array or object. If there are other JSON arrays or JSON objects nested in the JSON array, you can use recursion to convert it into a PHP array. In actual development, by flexibly applying the above knowledge according to the actual situation, JSON data can be parsed and processed more quickly and conveniently.

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