Foreach循环中的PHP参考对象

Question

可以说我有这些课程:

class Foo {
   public $_data;
   public function addObject($obj) {
        $this->_data['objects'][] = $obj;
   }
}

class Bar {
    public $_data;
    public function __construct() {
        $this->_data['value'] = 42;
    }
    public function setValue($value) {
        $this->_data['value'] = $value;
    }
}

$foo = new Foo();
$bar = new Bar();
$foo->addObject($bar);
foreach($foo->_data['objects'] as $object) {
    $object->setValue(1);
}
echo $foo->_data['objects'][0]->_data['value']; //42

我的实际代码是非常相似的,使用ArrayAccess:

foreach($this->_data['columns'] as &$column) {
                $filters = &$column->getFilters();
                foreach($filters as &$filter) {
                    $filter->filterCollection($this->_data['collection']);
                }
            }

filterCollection更改$ filter中的值,但是当您查看$ this对象时,该值不正确.

Answer 1

foreach($foo->_data['objects'] as &$object) {
    $object->setValue(1);
}

请注意&