使用reflection和setValue创建的对象具有空属性

Question

我正在尝试从POST数据生成类Bar的对象。我正在使用我找到here的函数来执行此操作。

我将数据从foo.php发布到bar.php。 bar.php成功接收post数据并运行静态方法Bar :: generate，它返回一个Bar对象。

问题是，即使函数接收到正确的数据并知道在何处设置它，返回的对象属性也是空的。

foo.php

<?php
    function postArray($array, $destScript){
        try {
            $ch = curl_init();

            if (FALSE === $ch){
                throw new Exception('failed to initialize');
            }

            curl_setopt($ch, CURLOPT_URL,$destScript);
            curl_setopt($ch, CURLOPT_POST, count($array));
            curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($array));
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

            $content = curl_exec($ch);
            return $content;

        if (FALSE === $content)
            throw new Exception(curl_error($ch), curl_errno($ch));

        } catch(Exception $e) {
            trigger_error(sprintf('Curl failed with error #%d: %s', $e->getCode(), $e->getMessage()),E_USER_ERROR);
        }   
    }

    echo postArray(array('action' => 'generate', 'first' => 'yes',  'second' => 'no', 'third' => 'maybe'), 'http://herbie.eu/indev/bar.php');
?>

bar.php

<?php
    class Bar{
        public $first;
        public $second;
        public $third;

        private function __construct($options){
            $this->loadFromArray($options);
        }

        private function loadFromArray($array) {
            $class = new ReflectionClass(get_class($this));
            $props = $class->getProperties();

            foreach($props as $p) {
                if (isset($array[$p->getName()])){
                    $p->setValue($this, $array[$p->getName]);
                    echo $p->getName()." = ".$array[$p->getName()]."<br>";
                }
            }

            echo "<br>";
        }

        static public function generate($options){
            try{
                return new Bar($options);
            }
            catch(NotFoundException $unfe){
                echo 'Bar::generate failed + '.$unfe;
                return NULL;
            }
        }
    }

    if(!empty($_POST['action'])){
        if($_POST['action'] == "generate"){
            $booking = Bar::generate($_POST);
            echo "success ".count($_POST)."<br>";
            print_r($booking);
        }
    }
    else{
        echo "WARNING_L0: ${_POST}['action'] not set";
    }
?>

运行foo.php返回，

first = yes
second = no
third = maybe

success 4
Bar Object ( [first] => [second] => [third] => )

正如您所看到的，loadFromArray中的ReflectionClass确切地知道要放在哪里，但返回的对象是空的。 4是计数的结果（$ _ POST）。