我正在集成一个API到我的网站，它与存储在对象中的数据一起工作，而我的代码是使用数组编写的。
我想要一个快速和肮脏的函数将对象转换为数组。
当前回答
我认为使用trait来存储对象到数组的转换逻辑是一个不错的想法。举个简单的例子:
trait ArrayAwareTrait
{
/**
* Return list of Entity's parameters
* @return array
*/
public function toArray()
{
$props = array_flip($this->getPropertiesList());
return array_map(
function ($item) {
if ($item instanceof \DateTime) {
return $item->format(DATE_ATOM);
}
return $item;
},
array_filter(get_object_vars($this), function ($key) use ($props) {
return array_key_exists($key, $props);
}, ARRAY_FILTER_USE_KEY)
);
}
/**
* @return array
*/
protected function getPropertiesList()
{
if (method_exists($this, '__sleep')) {
return $this->__sleep();
}
if (defined('static::PROPERTIES')) {
return static::PROPERTIES;
}
return [];
}
}
class OrderResponse
{
use ArrayAwareTrait;
const PROP_ORDER_ID = 'orderId';
const PROP_TITLE = 'title';
const PROP_QUANTITY = 'quantity';
const PROP_BUYER_USERNAME = 'buyerUsername';
const PROP_COST_VALUE = 'costValue';
const PROP_ADDRESS = 'address';
private $orderId;
private $title;
private $quantity;
private $buyerUsername;
private $costValue;
private $address;
/**
* @param $orderId
* @param $title
* @param $quantity
* @param $buyerUsername
* @param $costValue
* @param $address
*/
public function __construct(
$orderId,
$title,
$quantity,
$buyerUsername,
$costValue,
$address
) {
$this->orderId = $orderId;
$this->title = $title;
$this->quantity = $quantity;
$this->buyerUsername = $buyerUsername;
$this->costValue = $costValue;
$this->address = $address;
}
/**
* @inheritDoc
*/
public function __sleep()
{
return [
static::PROP_ORDER_ID,
static::PROP_TITLE,
static::PROP_QUANTITY,
static::PROP_BUYER_USERNAME,
static::PROP_COST_VALUE,
static::PROP_ADDRESS,
];
}
/**
* @return mixed
*/
public function getOrderId()
{
return $this->orderId;
}
/**
* @return mixed
*/
public function getTitle()
{
return $this->title;
}
/**
* @return mixed
*/
public function getQuantity()
{
return $this->quantity;
}
/**
* @return mixed
*/
public function getBuyerUsername()
{
return $this->buyerUsername;
}
/**
* @return mixed
*/
public function getCostValue()
{
return $this->costValue;
}
/**
* @return string
*/
public function getAddress()
{
return $this->address;
}
}
$orderResponse = new OrderResponse(...);
var_dump($orderResponse->toArray());
其他回答
我认为使用trait来存储对象到数组的转换逻辑是一个不错的想法。举个简单的例子:
trait ArrayAwareTrait
{
/**
* Return list of Entity's parameters
* @return array
*/
public function toArray()
{
$props = array_flip($this->getPropertiesList());
return array_map(
function ($item) {
if ($item instanceof \DateTime) {
return $item->format(DATE_ATOM);
}
return $item;
},
array_filter(get_object_vars($this), function ($key) use ($props) {
return array_key_exists($key, $props);
}, ARRAY_FILTER_USE_KEY)
);
}
/**
* @return array
*/
protected function getPropertiesList()
{
if (method_exists($this, '__sleep')) {
return $this->__sleep();
}
if (defined('static::PROPERTIES')) {
return static::PROPERTIES;
}
return [];
}
}
class OrderResponse
{
use ArrayAwareTrait;
const PROP_ORDER_ID = 'orderId';
const PROP_TITLE = 'title';
const PROP_QUANTITY = 'quantity';
const PROP_BUYER_USERNAME = 'buyerUsername';
const PROP_COST_VALUE = 'costValue';
const PROP_ADDRESS = 'address';
private $orderId;
private $title;
private $quantity;
private $buyerUsername;
private $costValue;
private $address;
/**
* @param $orderId
* @param $title
* @param $quantity
* @param $buyerUsername
* @param $costValue
* @param $address
*/
public function __construct(
$orderId,
$title,
$quantity,
$buyerUsername,
$costValue,
$address
) {
$this->orderId = $orderId;
$this->title = $title;
$this->quantity = $quantity;
$this->buyerUsername = $buyerUsername;
$this->costValue = $costValue;
$this->address = $address;
}
/**
* @inheritDoc
*/
public function __sleep()
{
return [
static::PROP_ORDER_ID,
static::PROP_TITLE,
static::PROP_QUANTITY,
static::PROP_BUYER_USERNAME,
static::PROP_COST_VALUE,
static::PROP_ADDRESS,
];
}
/**
* @return mixed
*/
public function getOrderId()
{
return $this->orderId;
}
/**
* @return mixed
*/
public function getTitle()
{
return $this->title;
}
/**
* @return mixed
*/
public function getQuantity()
{
return $this->quantity;
}
/**
* @return mixed
*/
public function getBuyerUsername()
{
return $this->buyerUsername;
}
/**
* @return mixed
*/
public function getCostValue()
{
return $this->costValue;
}
/**
* @return string
*/
public function getAddress()
{
return $this->address;
}
}
$orderResponse = new OrderResponse(...);
var_dump($orderResponse->toArray());
$Menu = new Admin_Model_DbTable_Menu();
$row = $Menu->fetchRow($Menu->select()->where('id = ?', $id));
$Addmenu = new Admin_Form_Addmenu();
$Addmenu->populate($row->toArray());
这里我创建了一个objectToArray()方法，它也适用于递归对象，比如当$objectA包含$objectB时，$objectB再次指向$objectA。
另外，我使用ReflectionClass将输出限制为公共属性。如果你不需要，就把它扔掉。
/**
* Converts given object to array, recursively.
* Just outputs public properties.
*
* @param object|array $object
* @return array|string
*/
protected function objectToArray($object) {
if (in_array($object, $this->usedObjects, TRUE)) {
return '**recursive**';
}
if (is_array($object) || is_object($object)) {
if (is_object($object)) {
$this->usedObjects[] = $object;
}
$result = array();
$reflectorClass = new \ReflectionClass(get_class($this));
foreach ($object as $key => $value) {
if ($reflectorClass->hasProperty($key) && $reflectorClass->getProperty($key)->isPublic()) {
$result[$key] = $this->objectToArray($value);
}
}
return $result;
}
return $object;
}
为了识别已经使用的对象，我在这个(抽象)类中使用了一个受保护的属性，名为$this->usedObjects。如果找到一个递归嵌套对象，它将被字符串**recursive**替换。否则会因为无限循环而失败。
通过依赖JSON编码/解码函数的行为，可以快速将深度嵌套的对象转换为关联数组:
$array = json_decode(json_encode($nested_object), true);
自定义函数将stdClass转换为数组:
function objectToArray($d) {
if (is_object($d)) {
// Gets the properties of the given object
// with get_object_vars function
$d = get_object_vars($d);
}
if (is_array($d)) {
/*
* Return array converted to object
* Using __FUNCTION__ (Magic constant)
* for recursive call
*/
return array_map(__FUNCTION__, $d);
} else {
// Return array
return $d;
}
}
另一个将Array转换为stdClass的自定义函数:
function arrayToObject($d) {
if (is_array($d)) {
/*
* Return array converted to object
* Using __FUNCTION__ (Magic constant)
* for recursive call
*/
return (object) array_map(__FUNCTION__, $d);
} else {
// Return object
return $d;
}
}
使用的例子:
// Create new stdClass Object
$init = new stdClass;
// Add some test data
$init->foo = "Test data";
$init->bar = new stdClass;
$init->bar->baaz = "Testing";
$init->bar->fooz = new stdClass;
$init->bar->fooz->baz = "Testing again";
$init->foox = "Just test";
// Convert array to object and then object back to array
$array = objectToArray($init);
$object = arrayToObject($array);
// Print objects and array
print_r($init);
echo "\n";
print_r($array);
echo "\n";
print_r($object);
