php - 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 Documentation 实现自定义 MVC 组件.

我在尝试使用 JCategories::get() 从 com_component 获取类别列表及其子项时遇到了问题。我收到以下错误:

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

如果我不发出print_r($this->items);来列出项目，我不会收到错误.如果我换行

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

阅读

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

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。仅供引用，过去几天我一直在 irc.freenode.net/#joomla 与任何愿意提供帮助的人交谈，但进展甚微。任何帮助将不胜感激。

Controller 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();

模型代码:

<?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 会导致无限循环。因此，我将上面的模型修改为以下内容:

<?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;

    }

}