将PHP对象转换为关联数组 [英] Convert a PHP object to an associative array

问题描述

我正在将一个API集成到我的网站中，该网站可以使用数组编写代码时处理存储在对象中的数据.

I'm integrating an API to my website which works with data stored in objects while my code is written using arrays.

我想要一个快捷的函数来将对象转换为数组.

I'd like a quick-and-dirty function to convert an object to an array.

推荐答案

只需打字

$array = (array) $yourObject;

来自 数组 :

如果将对象转换为数组，则结果是一个数组，其元素是对象的属性.键是成员变量名称，但有一些值得注意的例外:整数属性不可访问；私有变量的类名在变量名之前；受保护的变量在变量名前带有"*".这些前置值的两边都为空字节.

If an object is converted to an array, the result is an array whose elements are the object's properties. The keys are the member variable names, with a few notable exceptions: integer properties are unaccessible; private variables have the class name prepended to the variable name; protected variables have a '*' prepended to the variable name. These prepended values have null bytes on either side.

示例:简单对象

$object = new StdClass;
$object->foo = 1;
$object->bar = 2;

var_dump( (array) $object );

输出:

array(2) {
  'foo' => int(1)
  'bar' => int(2)
}

示例:复杂对象

class Foo
{
    private $foo;
    protected $bar;
    public $baz;

    public function __construct()
    {
        $this->foo = 1;
        $this->bar = 2;
        $this->baz = new StdClass;
    }
}

var_dump( (array) new Foo );

输出(为清晰起见，已编辑\ 0s):

array(3) {
  '\0Foo\0foo' => int(1)
  '\0*\0bar' => int(2)
  'baz' => class stdClass#2 (0) {}
}

使用var_export而不是var_dump的输出:

Output with var_export instead of var_dump:

array (
  '' . "\0" . 'Foo' . "\0" . 'foo' => 1,
  '' . "\0" . '*' . "\0" . 'bar' => 2,
  'baz' =>
  stdClass::__set_state(array(
  )),
)

以这种方式进行类型转换不会对对象图进行深度转换，并且您需要应用空字节(如手册引用中所述)以访问任何非公共属性.因此，这在投射StdClass对象或仅具有公共属性的对象时效果最佳.对于快速又脏的(您要的)，没关系.

Typecasting this way will not do deep casting of the object graph and you need to apply the null bytes (as explained in the manual quote) to access any non-public attributes. So this works best when casting StdClass objects or objects with only public properties. For quick and dirty (what you asked for) it's fine.

另请参阅此深入的博客文章:

Also see this in-depth blog post:

• 将PHP对象快速转换为数组

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