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Laravel – Auto fill object from json

I have a JSON:

{
   "id":1,
   "name":"John",
   "firstname":"Doe"
}

Server side, I do it:

$input = $request->json()->all();
$user = new User();
$user->id = $input['id'];
$user->name = $input['name'];
$user->firstname = $input['firstname'];

Does it possible to auto fill my object with a JSON, if the the JSON fields and my object fields are the same ? Like below ?

$user = new User();
$user->fromJSON($input);
Tags:

2

Answers


  1. 0

    Yes, it’s possible to create a method fromJSON() in your User class to automatically fill the object properties from a JSON input. Here’s how you can do it:

    class User {
    public $id;
    public $name;
    public $firstname;

    public function fromJSON($json) {
        $data = json_decode($json, true);

        foreach ($data as $key => $value) {
            if (property_exists($this, $key)) {
                $this->{$key} = $value;
            }
        }
    }
}

// Example usage:
$input = '{
   "id":1,
   "name":"John",
   "firstname":"Doe"
}';

$user = new User();
$user->fromJSON($input);

// Now $user has its properties filled with values from the JSON
echo $user->id; // Outputs: 1
echo $user->name; // Outputs: John
echo $user->firstname; // Outputs: Doe

    This method fromJSON() takes a JSON string as input, decodes it into an associative array, and then iterates over each key-value pair. If a property with the same name exists in the User class, it assigns the corresponding value from the JSON data to that property.

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  2. 0

    You can use the json_decode function to convert a JSON string into a PHP object.

    I have updated your code like below:

    $jsonString = '{"id":1,"name":"John","firstname":"Doe"}';

$userObject = json_decode($jsonString);

// If you need to convert it to an associative array, you can pass true as the second parameter
$userArray = json_decode($jsonString, true);

    If you have a class User and you want to fill its properties with values from a JSON string, you could write a method in the User class that takes a JSON string, decodes it, and sets the properties accordingly:

    class User {
  public $id;
  public $name;
  public $firstname;

  public function fromJSON($jsonString) {
    $jsonObject = json_decode($jsonString);
    $this->id = $jsonObject->id;
    $this->name = $jsonObject->name;
    $this->firstname = $jsonObject->firstname;
  }
}

// Usage
$user = new User();
$user->fromJSON($jsonString);

    This simple example does not include error checking or more complex scenarios such as nested objects or arrays.

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