简单的问题，如何将关联数组转换为类中的变量？我知道有一个(object) $myarray或其他任何东西的铸造，但这将创建一个新的stdClass，并没有帮助我。是否有任何简单的一行或两行方法可以将我的数组中的每个$key => $value对变为我的类的$key = $value变量？我觉得使用foreach循环并不合乎逻辑，我最好将它转换为stdClass并将其存储在变量中，不是吗？
class MyClass {
var $myvar; // I want variables like this, so they can be references as $this->myvar
function __construct($myarray) {
// a function to put my array into variables
}
}
答案 0 :(得分：64)
这个简单的代码应该有效：
<?php
class MyClass {
public function __construct(Array $properties=array()){
foreach($properties as $key => $value){
$this->{$key} = $value;
}
}
}
?>
使用示例
$foo = new MyClass(array("hello" => "world"));
$foo->hello // => "world"
或者，这可能是一种更好的方法
<?php
class MyClass {
private $_data;
public function __construct(Array $properties=array()){
$this->_data = $properties;
}
// magic methods!
public function __set($property, $value){
return $this->_data[$property] = $value;
}
public function __get($property){
return array_key_exists($property, $this->_data)
? $this->_data[$property]
: null
;
}
}
?>
用法相同
// init
$foo = new MyClass(array("hello" => "world"));
$foo->hello; // => "world"
// set: this calls __set()
$foo->invader = "zim";
// get: this calls __get()
$foo->invader; // => "zim"
// attempt to get a data[key] that isn't set
$foo->invalid; // => null
答案 1 :(得分：2)
最佳解决方案是让trait具有可用于数据加载的静态函数fromArray：
trait FromArray {
public static function fromArray(array $data = []) {
foreach (get_object_vars($obj = new self) as $property => $default) {
if (!array_key_exists($property, $data)) continue;
$obj->{$property} = $data[$property]; // assign value to object
}
return $obj;
}
}
然后你可以像这样使用这个特性：
class Example {
use FromArray;
public $data;
public $prop;
}
然后你可以调用静态fromArray函数来获取Example类的新实例：
$obj = Example::fromArray(['data' => 123, 'prop' => false]);
var_dump($obj);
我还有更复杂的版本，包括嵌套和值过滤https://github.com/OzzyCzech/fromArray
答案 2 :(得分：1)
这是使用PDOStatement::fetchObject的另一个解决方案，虽然它有点像黑客。
$array = array('property1' => 'value1', 'property2' => 'value2');
$className = 'MyClass';
$pdo = new PDO('sqlite::memory:'); // we don't actually need sqlite; any PDO connection will do
$select = 'SELECT ? AS property1, ? AS property2'; // this could also be built from the array keys
$statement = $pdo->prepare($select);
// this last part can also be re-used in a loop
$statement->execute(array_values($array));
$myObject = $statement->fetchObject($className);
答案 3 :(得分：0)
定义一个静态方法来转换从数组中获取实例。最好，为它定义一个接口。这是声明性的，不会污染构造函数，允许您设置私有属性并仍然实现Reflection无法实现的自定义逻辑。如果您需要通用解决方案，请定义特征并在类中使用它。
class Test implements ContructableFromArray {
private $property;
public static function fromArray(array $array) {
$instance = new self();
$instance->property = $array['property'];
return $instance;
}
}
interface ConstructableFromArray {
public static function fromArray(array $array);
}
答案 4 :(得分：0)
如果你（像我一样）来到这里寻找array-＆gt;类的源代码生成器，我真的找不到任何东西，然后我想出了这个（正在进行的工作，没有经过充分测试或者任何东西，json_decode返回数组。）：
<?php
declare(strict_types = 1);
$json = <<<'JSON'
{"object_kind":"push","event_name":"push","before":"657dbca6668a99012952c58e8c8072d338b48d20","after":"5ac3eda70dbb44bfdf98a3db87515864036db0f9","ref":"refs/heads/master","checkout_sha":"5ac3eda70dbb44bfdf98a3db87515864036db0f9","message":null,"user_id":805411,"user_name":"hanshenrik","user_email":"divinity76@gmail.com","user_avatar":"https://secure.gravatar.com/avatar/e3af2bd4b5604b0b661b5e6646544eba?s=80\u0026d=identicon","project_id":3498684,"project":{"name":"gitlab_integration_tests","description":"","web_url":"https://gitlab.com/divinity76/gitlab_integration_tests","avatar_url":null,"git_ssh_url":"git@gitlab.com:divinity76/gitlab_integration_tests.git","git_http_url":"https://gitlab.com/divinity76/gitlab_integration_tests.git","namespace":"divinity76","visibility_level":0,"path_with_namespace":"divinity76/gitlab_integration_tests","default_branch":"master","homepage":"https://gitlab.com/divinity76/gitlab_integration_tests","url":"git@gitlab.com:divinity76/gitlab_integration_tests.git","ssh_url":"git@gitlab.com:divinity76/gitlab_integration_tests.git","http_url":"https://gitlab.com/divinity76/gitlab_integration_tests.git"},"commits":[{"id":"5ac3eda70dbb44bfdf98a3db87515864036db0f9","message":"dsf\n","timestamp":"2017-06-14T02:21:50+02:00","url":"https://gitlab.com/divinity76/gitlab_integration_tests/commit/5ac3eda70dbb44bfdf98a3db87515864036db0f9","author":{"name":"hanshenrik","email":"divinity76@gmail.com"},"added":[],"modified":["gitlab_callback_page.php"],"removed":[]}],"total_commits_count":1,"repository":{"name":"gitlab_integration_tests","url":"git@gitlab.com:divinity76/gitlab_integration_tests.git","description":"","homepage":"https://gitlab.com/divinity76/gitlab_integration_tests","git_http_url":"https://gitlab.com/divinity76/gitlab_integration_tests.git","git_ssh_url":"git@gitlab.com:divinity76/gitlab_integration_tests.git","visibility_level":0}}
JSON;
$arr = json_decode ( $json, true );
var_dump ( array_to_class ( $arr ) );
/**
*
* @param array $arr
* @param string $top_class_name
*/
function array_to_class(array $arr, string $top_class_name = "TopClass"): string {
$top_class_name = ucfirst ( $top_class_name );
$classes = array (); // deduplicated 'definition'=>true,array_keys();
$internal = function (array $arr, string $top_class_name) use (&$classes, &$internal) {
$curr = 'Class ' . $top_class_name . ' {' . "\n";
foreach ( $arr as $key => $val ) {
$type = gettype ( $val );
if (is_array ( $val )) {
$type = ucfirst ( ( string ) $key );
$classes [$internal ( $val, ( string ) $key )] = true;
}
$curr .= <<<FOO
/**
* @property $type \$$key
*/
FOO;
$curr .= "\n public $" . $key . ";\n";
}
$curr .= '}';
$classes [$curr] = true;
};
$internal ( $arr, $top_class_name );
return implode ( "\n", array_keys ( $classes ) );
}
输出：
Class project {
/**
* @property string $name
*/
public $name;
/**
* @property string $description
*/
public $description;
/**
* @property string $web_url
*/
public $web_url;
/**
* @property NULL $avatar_url
*/
public $avatar_url;
/**
* @property string $git_ssh_url
*/
public $git_ssh_url;
/**
* @property string $git_http_url
*/
public $git_http_url;
/**
* @property string $namespace
*/
public $namespace;
/**
* @property integer $visibility_level
*/
public $visibility_level;
/**
* @property string $path_with_namespace
*/
public $path_with_namespace;
/**
* @property string $default_branch
*/
public $default_branch;
/**
* @property string $homepage
*/
public $homepage;
/**
* @property string $url
*/
public $url;
/**
* @property string $ssh_url
*/
public $ssh_url;
/**
* @property string $http_url
*/
public $http_url;
}
Class author {
/**
* @property string $name
*/
public $name;
/**
* @property string $email
*/
public $email;
}
Class added {
}
Class modified {
/**
* @property string $0
*/
public $0;
}
Class removed {
}
Class 0 {
/**
* @property string $id
*/
public $id;
/**
* @property string $message
*/
public $message;
/**
* @property string $timestamp
*/
public $timestamp;
/**
* @property string $url
*/
public $url;
/**
* @property Author $author
*/
public $author;
/**
* @property Added $added
*/
public $added;
/**
* @property Modified $modified
*/
public $modified;
/**
* @property Removed $removed
*/
public $removed;
}
Class commits {
/**
* @property 0 $0
*/
public $0;
}
Class repository {
/**
* @property string $name
*/
public $name;
/**
* @property string $url
*/
public $url;
/**
* @property string $description
*/
public $description;
/**
* @property string $homepage
*/
public $homepage;
/**
* @property string $git_http_url
*/
public $git_http_url;
/**
* @property string $git_ssh_url
*/
public $git_ssh_url;
/**
* @property integer $visibility_level
*/
public $visibility_level;
}
Class TopClass {
/**
* @property string $object_kind
*/
public $object_kind;
/**
* @property string $event_name
*/
public $event_name;
/**
* @property string $before
*/
public $before;
/**
* @property string $after
*/
public $after;
/**
* @property string $ref
*/
public $ref;
/**
* @property string $checkout_sha
*/
public $checkout_sha;
/**
* @property NULL $message
*/
public $message;
/**
* @property integer $user_id
*/
public $user_id;
/**
* @property string $user_name
*/
public $user_name;
/**
* @property string $user_email
*/
public $user_email;
/**
* @property string $user_avatar
*/
public $user_avatar;
/**
* @property integer $project_id
*/
public $project_id;
/**
* @property Project $project
*/
public $project;
/**
* @property Commits $commits
*/
public $commits;
/**
* @property integer $total_commits_count
*/
public $total_commits_count;
/**
* @property Repository $repository
*/
public $repository;
}
答案 5 :(得分：0)
如果要将嵌套数组转换为对象，请使用以下代码：
class ToObject
{
private $_data;
public function __construct(array $data)
{
$this->setData($data);
}
/**
* @return array
*/
public function getData()
{
return $this->_data;
}
/**
* @param array $data
*/
public function setData(array $data)
{
$this->_data = $data;
return $this;
}
public function __call($property, $args)
{
// NOTE: change lcfirst if you need (ucfirst/...) or put all together
$property = lcfirst(str_replace('get', '', $property));
if (array_key_exists($property, $this->_data)) {
if (is_array($this->_data[$property])) {
return new self($this->_data[$property]);
}
return $this->_data[$property];
}
return null;
}
}
然后你就可以这样使用：
$array = [
'first' => '1.1',
'second' => [
'first' => '2.1',
'second' => '2.2',
'third' => [
'first' => '2.3.1'
]
]
];
$object = new ToObject($array);
$object->getFirst(); // returns 1.1
$object->getSecond()->getFirst(); // returns 2.1
$object->getSecond()->getData(); // returns second array
$object->getSecond()->getThird()->getFirst(); // returns 2.3.1