php - 父类中的变量不会被覆盖

请看我的AN EMPTY ARRAY代码。有谁能告诉我为什么在执行下面的代码时，数组是空的，并且没有从AccountModel中填充
$accountModel->setEmail('[email protected]');

class AccountModel extends Model {
protected   $table = 'account',
            $key = 'id',
            $data = array(
                'id' => null,
                'email' => null,
                'first_name' => null,
                'created' => null,
                'last_login' => null,
                'hash' => null
            );
}


class Model extends CI_Model {
    protected $table = null;
    protected $key = null;
    protected $connection = null;
    protected $data = array();

public function __call ($function, $arguments) {
    $original = $function;
    $function = strtolower(preg_replace('/(?<=[a-z])([A-Z])/', '_$1', $function));

    $prefix = substr($function, 0, 4); //returns get_ or set_

    if ($prefix == 'get_' || $prefix == 'set_') {
        $key = substr($function, 4); //returns "email"
        var_dump($this->data); //AN EMPTY ARRAY
        exit($key);
    }

    throw new Exception('Call to undefined method '.get_class($this).'::'.$original.'()');
}
}

根据example 2 on PHP.net的说法，它应该工作得很好。
我正在尝试运行$accountmodel->setemail（'[email protected]'）；
更新：我意识到我的代码中还有一个bug，失败了。谢谢你们的帮助

最佳答案

似乎，您的$accountmodel不属于accountmodel类：尝试var_dump(get_class($this))

<?php
class Animal {
    public $data = 'i`m animal';
    protected $_data = 'i`m animal';

    public function go() {
        var_dump($this->data);
        var_dump($this->_data);
    }

    public function __call ($function, $arguments) {
        echo 'I was called as ' . $function . PHP_EOL;
        var_dump($this->data);
        var_dump($this->_data);
    }
}

class Cat extends Animal {
    public $data = 'i`m cat';
    protected $_data = 'i`m cat';
}

$pussy = new Cat();
$pussy->go();
$pussy->iamMagicMethod();