What are the common ways to convert arrays to objects in PHP?

How to convert PHP array to object: use stdClass class, use json_decode() function, use third-party library (such as ArrayObject class, Hydrator library)

PHP array Common ways to convert an object

In PHP, there are several ways to convert an array into an object. The following are some common methods:

1. Use the stdClass class

stdClass class is a standard class provided by PHP , can be used to create an empty object. We can use the properties of the stdClass object to store key-value pairs in an array.

$array = ['name' => 'John Doe', 'age' => 30];

$object = new stdClass();
foreach ($array as $key => $value) {
    $object->$key = $value;
}

2. Use the built-in function json_decode()

json_decode() The function can decode the JSON string into PHP object. We can convert the array to a JSON string and then decode it into an object using the json_decode() function.

$array = ['name' => 'John Doe', 'age' => 30];

$json = json_encode($array);
$object = json_decode($json);

3. Use third-party libraries

There are some third-party libraries that can also be used for conversion of arrays and objects, for example:

• ArrayObject Class ([PHP Documentation](https://www.php.net/manual/en/class.arrayobject.php))
• Hydrator Library ([Composer](https://packagist.org/packages/laminas/laminas-hydrator))

Practical case

Suppose we have a package containing Array of user data:

$users = [
    ['id' => 1, 'name' => 'John Doe', 'email' => 'john@example.com'],
    ['id' => 2, 'name' => 'Jane Doe', 'email' => 'jane@example.com'],
];

We can convert the array to object using the above method:

Using stdClass Class:

foreach ($users as $user) {
    $object = new stdClass();
    $object->id = $user['id'];
    $object->name = $user['name'];
    $object->email = $user['email'];
}

Use json_decode() Function:

foreach ($users as $user) {
    $json = json_encode($user);
    $object = json_decode($json);
}

Use ArrayObject Class:

foreach ($users as $user) {
    $object = new ArrayObject($user);
}

Now we have a collection of objects containing user data and we can easily access their properties. For example:

echo $object->name; // 输出："John Doe"

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