Joomla 1.6 JCategories：：get() 方法在自定义 MVC 组件中生成'PHP Fatal error: Allowed memory exhausted'

Question

我正在按照Joomla 1.6文档实现一个自定义MVC组件。

我在尝试使用JCategories::get()从com_component获取类别及其子项的列表时遇到了一个问题。我收到以下错误：

PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 125306881 bytes)

如果我发布print_r($this->items);以列出项目，则我不会收到错误。如果我更改线路

$categories = JCategories::getInstance('Content');

读取

$categories = JCategories::getInstance('banners');

我没有收到错误。

我在下面包含了我所有的自定义组件代码。仅供参考，在过去的几天里，我在irc.freenode.net/#joomla与任何愿意在进展甚微的情况下提供帮助的人交谈。任何帮助都将不胜感激。

控制器代码：

  <?php
  // No direct access to this file
  defined('_JEXEC') or die('Restricted access');
  // import joomla controller library
  jimport('joomla.application.component.controller');
  $controller = JController::getInstance('CtItem');
  $controller->execute(JRequest::getCmd('task'));
  $controller->redirect();

型号代码：

<?php
// No direct access to this file
defined('_JEXEC') or die;
// import Joomla Categories library
jimport( 'joomla.application.categories' );
class CtItemModelCtItem extends JModel
{
    private $_items = null;
    private $_parent = null;
    public function getItems($recursive = false)
    {
        $categories = JCategories::getInstance('Content');
        $this->_parent = $categories->get(15);
        if(is_object($this->_parent))
        {
            $this->_items = $this->_parent->getChildren($recursive);
        }
        else
        {
            $this->_items = false;
        }
        return $this->_items;
    }
}

查看代码：

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');
// import Joomla view library
jimport('joomla.application.component.view');
class CtItemViewCtItem extends JView
{
    // Overwriting JView display method
    function display($tpl = null) 
    {
        // Assign data to the view
        $this->items = $this->get('Items');
        if(count($errors = $this->get('Errors'))) 
        {
            JError::raiseError(500, implode('<br />', $errors));
            return false;
        }
        // Display the view
        parent::display($tpl);
    }
}

模板代码：

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');
$document = JFactory::getDocument();
?>
<div id="Test"><?=print_r($this->items, true)?></div>

Answer 1

我发现尝试var_dump()或print_r() JCategoryNode会导致无休止的循环。因此，我将上面的模型修改为：

<?php
// No direct access to this file
defined('_JEXEC') or die;
// import Joomla Categories library
jimport( 'joomla.application.categories' );
class CtItemModelCtItem extends JModel
{
    private $_items = null;
    private $_parent = null;
    public function getItems($recursive = false)
    {
        $categories = JCategories::getInstance('Content');
        $this->_parent = $categories->get(15);
        if(is_object($this->_parent))
        {
            $this->_items = $this->_parent->getChildren($recursive);
        }
        else
        {
            $this->_items = false;
        }
        return $this->loadCats($this->_items);
    }

    protected function loadCats($cats = array())
    {
        if(is_array($cats))
        {
            $i = 0;
            $return = array();
            foreach($cats as $JCatNode)
            {
                $return[$i]->title = $JCatNode->title;
                if($JCatNode->hasChildren())
                    $return[$i]->children = $this->loadCats($JCatNode->getChildren());
                else
                    $return[$i]->children = false;
                $i++;
            }
            return $return;
        }
        return false;
    }
}