PHP 遍历 ArrayObject

Question

这是我第一次使用 ArrayObjects，所以我可能 100% 不理解它，但是你能解释一下如何遍历它们吗？

这是我的代码：

$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() returns 0 和 $this->plugins->getIterator()->valid(); returns 也是错误的。我必须做什么？

Answer 1

你已经走得太远了，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();
}

Source

Answer 2

你的代码几乎没问题，只是改变了变量的初始化，所以而不是plugins->plugin1 = "plugin1"，把所有的东西都放在array("plugin1", ...)的开头。所以

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

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

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