通过ArrayObject循环

Question

这是我第一次与ArrayObjects合作，所以我可能不明白它100%，但你能解释一下我如何循环它们吗？

这是我的密码：

$this->plugins = new \ArrayObject(array());
//just for testing...
$this->plugins->plugin1 = "plugin1";
$this->plugins->plugin2 = "plugin2";
$this->plugins->plugin3 = "plugin3";

foreach ($this->plugins as $plugin){
     //never reached
}

$this->plugins->count()返回0，$this->plugins->getIterator()->valid();也返回false。我该怎么做？

Answer 1

你已经走得很远了，但这就是它的工作原理。

// You can already have an array like this
$array = array('Buck','Jerry','Tomas');

$arrayObject = new ArrayObject($array);
// Add new element
$arrayObject->append('Tweety');

// We are getting the iterator of the object
$iterator = $arrayObject->getIterator();

// Simple while loop
while ($iterator->valid()) {
    echo $iterator->current() . "\n";
    $iterator->next();
}

来源

Answer 2

您的代码几乎没有问题，只需更改变量的初始化，因此plugins->plugin1 = "plugin1"在开始时将所有内容都放入array("plugin1", ...)中。所以

$plugins = new ArrayObject(array("plugin1", "plugin2", "plugin3"));

foreach ($plugins as $plugin){
    echo $plugin . "<br>";
}