php 对象转数组

class Example {
    public $name = "John";
    public $age = 30;
}

$obj = new Example();
$array = get_object_vars($obj);

print_r($array);

$obj = (object) ['name' => 'John', 'age' => 30];
$array = (array) $obj;

print_r($array);

class Example {
    private $name = "John";
    private $age = 30;
}

$obj = new Example();
$reflection = new ReflectionObject($obj);
$properties = $reflection->getProperties(ReflectionProperty::IS_PRIVATE | ReflectionProperty::IS_PROTECTED);

$array = [];
foreach ($properties as $property) {
    $property->setAccessible(true);
    $array[$property->getName()] = $property->getValue($obj);
}

print_r($array);

function objectToArray($obj, &$visited = []) {
    if (is_object($obj)) {
        if (in_array($obj, $visited, true)) {
            return '[Circular]';
        }
        $visited[] = $obj;
        $obj = get_object_vars($obj);
    }
    if (is_array($obj)) {
        return array_map(function($item) use (&$visited) {
            return objectToArray($item, $visited);
        }, $obj);
    }
    return $obj;
}

class Example {
    public $self = null;
}

$obj = new Example();
$obj->self = $obj;

$array = objectToArray($obj);
print_r($array);