迭代器内的 PHP 调用方法

Question

我是面向对象的初学者，我想知道是否可以使用一些强制转换、魔术方法或面向对象工程来调用下面注释代码中的内容？

提前致谢 佩佩

<?php
Class myArrayObj  {
    public $myArray ;

    function __construct(){
        $this->myArray = array( 
    0 => 'a', 
    1 => array('subA','subB',array(0 => 'subsubA', 1 => 'subsubB', 2 => array(0 => 'deepA', 1 => 'deepB'))), 
    2 => 'b', 
    3 => array('subA','subB','subC'), 
    4 => 'c'
    );
    }

    function getNumber() {
        return count($this->myArray);   
    }
}

$a = new myArrayObj();

$i = new RecursiveIteratorIterator(new RecursiveArrayIterator($a),RecursiveIteratorIterator::SELF_FIRST);

foreach($i as $key => $value) {
$type = gettype($value);
$depth = $i->getDepth();

if($i->hasChildren()) {
        echo "$depth: $key ($type) has children<br>";
        /* here is it possible to call ....->getNumber(); */
    } 
    else {
        echo "$depth: $key ($type) has no children<br>";
        /* here is it possible to call ....->getNumber(); */
    }
}

Answer 1

这样调用：

$a->getNumber();

这里$a 是myArrayObj 类的对象。您可以根据 access modifier 从类外部调用任何 property 和 method。

完整代码：

<?php
Class myArrayObj  {
    public $myArray ;

    function __construct(){
        $this->myArray = array( 
    0 => 'a', 
    1 => array('subA','subB',array(0 => 'subsubA', 1 => 'subsubB', 2 => array(0 => 'deepA', 1 => 'deepB'))), 
    2 => 'b', 
    3 => array('subA','subB','subC'), 
    4 => 'c'
    );
    }

    function getNumber() {
        return count($this->myArray);
    }

    function countArray($ar) {
        return count($ar);
    }
}

$a = new myArrayObj();

$i = new RecursiveIteratorIterator(new RecursiveArrayIterator($a),RecursiveIteratorIterator::SELF_FIRST);

foreach($i as $key => $value) {
$type = gettype($value);
$depth = $i->getDepth();

if($i->hasChildren()) {
        echo "$depth: $key ($type) has children<br>";
        /* here is it possible to call ....->getNumber(); */
        echo $a->countArray($value);
    } 
    else {
        echo "$depth: $key ($type) has no children<br>";
        /* here is it possible to call ....->getNumber(); */
        echo $a->countArray($value);
    }
}