Convert json to object array php

In the process of developing a Web application, it is often necessary to process data. Simply processing strings is not enough. Data conversion between different programming languages ​​is usually required. In PHP we need to convert JSON string to array of objects. Here are some instructions on how to convert JSON to an array of PHP objects.

JSON (JavaScript Object Notation) is a lightweight data exchange format that is easy to read and write, as well as easy for machines to parse and generate. JSON consists of basic data types, the most common of which include: strings, numbers, arrays, Boolean values, objects, and null values. JSON has become a standard data transfer format between clients and servers.

PHP has built-in JSON processing functions that can easily convert JSON strings into arrays or objects. The most commonly used function in PHP is the json_decode() function. This function converts a JSON string into a PHP variable (array or object). The json_decode() function takes two parameters: the JSON string to be converted and the returned data type (default is object). Here is a simple example:

$json_string = '{"name":"John","age":30,"city":"New York"}';
$obj = json_decode($json_string);
print_r($obj);

Output:

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

By default, the json_decode() function returns an object. We can also change it to return an array:

$json_string = '{"name":"John","age":30,"city":"New York"}';
$arr = json_decode($json_string, true);
print_r($arr);

Output:

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

In the above example, we used the second parameter to specify the return type as an array. This function follows some more complex rules when parsing JSON strings. You can check the official documentation for more details.

If you want to process a JSON string containing multiple JSON objects, you can add an extra parameter JSON_BIGINT_AS_STRING when calling the json_decode() function. This will ensure that the handler does not convert large numerical values ​​in the JSON string to floating point numbers. This is particularly useful when processing log events that contain one or more CUIDS (Customer IDs), as these IDs need to remain unique.

Here is an example:

$json_string = '[{"name":"John","age":30,"city":"New York"},{"name":"Mike","age":35,"city":"Chicago"}]';
$arr = json_decode($json_string, true, 512, JSON_BIGINT_AS_STRING);
print_r($arr);

Output:

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

    [1] => Array 
        ( 
            [name] => Mike 
            [age] => 35 
            [city] => Chicago 
        ) 

)

In the above example, we passed the JSON_BIGINT_AS_STRING parameter because we know that in our JSON string it is possible There will be large integers. It is important to handle this situation and ensure that these numbers are not converted to floating point numbers.

JSON is a very common format in front-end and back-end data transfer, so it is important to learn how to handle JSON. In PHP, we can easily convert a JSON string into an array of objects using the built-in json_decode() function. If you can use this function and related parameters appropriately, you can easily handle JSON data in PHP and process data quickly, efficiently, and safely.

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