Joomla 1.6 JCategories :: get（）方法在自定義MVC組件中產生'PHP致命錯誤：允許的內存耗盡'

Question

我在執行Joomla 1.6 Documentation之後的自定義MVC組件。

我在嘗試使用JCategories::get()從com_component獲取類別及其子項列表時遇到問題。我收到以下錯誤：

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

如果我不問題一個print_r($this->items);列出的項目，我做不收到一個錯誤。如果我更改線路

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

閱讀

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

我做不收到錯誤。

我在下面列出了我所有的自定義組件代碼。就像一個供參考，我已經花了幾天的時間在irc.freenode.net/#joomla與任何願意幫助取得很少進展的人交談。任何幫助將非常感激。

控制器代碼：

<?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(); 

型號代碼：

<?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; 
    } 

} 

查看代碼：

<?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); 

    } 

} 

模板代碼：

<?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

我發現，試圖var_dump()或print_r() JCategoryNode導致一個無限循環。因此，我將上述模型修改爲以下內容：

<?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; 

    } 

}