How to convert json to array or object in php

In recent years, with the development of web applications, PHP has become one of the most popular web development languages. During the development process, the processing of JSON data is often involved. This article will introduce how to use PHP to convert JSON data into different types of data such as arrays, objects, and array objects.

1. Convert JSON string to PHP array

In PHP, you can use the json_decode() function to convert JSON string to PHP array. The following is a simple example:

$json_string = '{"name": "小明", "age": 18}';
$array = json_decode($json_string, true);
print_r($array);

Run the above code, the output result is:

Array
(
    [name] => 小明
    [age] => 18
)

Among them, the second parameter of the json_decode() function is a Boolean type, indicating whether to convert the JSON object Convert to PHP object. When the second parameter value is true, a PHP array will be returned; otherwise, a PHP object will be returned.

2. Convert JSON string to PHP object

Similarly, you can use the json_decode() function to convert JSON string to PHP object. The following is an example:

$json_string = '{"name": "小明", "age": 18}';
$obj = json_decode($json_string);
echo $obj->name . ', ' . $obj->age;

Run the above code, the output result is:

小明, 18

3. Convert JSON string to PHP array object

In actual development, It is often necessary to convert JSON data into the form of PHP array objects. The following is a simple example:

$json_string = '{"students": [{"name": "小明", "age": 18}, {"name": "小红", "age": 17}]}';
$obj = json_decode($json_string);
$array = json_decode(json_encode($obj), true);
print_r($array);

Run the above code, the output result is:

Array
(
    [students] => Array
        (
            [0] => Array
                (
                    [name] => 小明
                    [age] => 18
                )

            [1] => Array
                (
                    [name] => 小红
                    [age] => 17
                )

        )

)

Among them, the json_encode() function converts the PHP object into a JSON string, and then uses json_decode () function to convert to PHP array.

To sum up, this article introduces the method of converting JSON data into different types of data such as arrays, objects, and array objects in PHP. Through these methods, JSON data can be easily processed, bringing more convenience to the development of web applications.

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