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我正在尝试访问我制作的文章中的元数据。该文章正在被称为News->网站新闻的菜单项下显示，该新闻是博客版面。去博客视图（和其他领域）文章的链接，我似乎无法访问元数据信息。PHP joomla在com_content中获取元数据
我对com_content中的所有类别使用view.html的覆盖。
我这样做的原因是，我可以根据他们的描述来控制每篇文章，类别和菜单（我认为我做了菜单）OG标记。图像部分是因为在元数据的后端，我添加了一个字段来选择你想要的图像。我的代码根据你在那里设置的硬编码恢复到$配置文件中设置的内容。无论如何，我的代码似乎只是在OG中显示配置文件中的变量，除了标题。
我的代码是这样的类别： //（大声笑）所有的代码是在og标签的区域。
<?php
/** * @package Joomla.Site * @subpackage com_content * @copyright版权所有（C）2005年至2014年开源事项，公司保留所有权利。 *许可GNU通用公共许可证版本2或更高版本;请参阅LICENSE.txt */ defined（'_ JEXEC'）或die; /** * HTML查看的内容组件类* @package Joomla.Site * @subpackage com_content * @since 1.5 */ 类ContentViewCategory扩展JViewLegacy
{
protected $state;
protected $items;
protected $category;
protected $children;
protected $pagination;
protected $lead_items = array();
protected $intro_items = array();
protected $link_items = array();
protected $columns = 1;
function display($tpl = null)
{
$app = JFactory::getApplication();
$user = JFactory::getUser();
// Get some data from the models
$state = $this->get('State');
$params = $state->params;
$items = $this->get('Items');
$category = $this->get('Category');
$children = $this->get('Children');
$parent = $this->get('Parent');
$pagination = $this->get('Pagination');
// Check for errors.
if (count($errors = $this->get('Errors')))
{
JError::raiseError(500, implode("\n", $errors));
return false;
}
if ($category == false)
{
return JError::raiseError(404, JText::_('JGLOBAL_CATEGORY_NOT_FOUND'));
}
if ($parent == false)
{
return JError::raiseError(404, JText::_('JGLOBAL_CATEGORY_NOT_FOUND'));
}
// Setup the category parameters.
$cparams = $category->getParams();
$category->params = clone ($params);
$category->params->merge($cparams);
// Check whether category access level allows access.
$user = JFactory::getUser();
$groups = $user->getAuthorisedViewLevels();
if (!in_array($category->access, $groups))
{
return JError::raiseError(403, JText::_('JERROR_ALERTNOAUTHOR'));
}
// PREPARE THE DATA
// Get the metrics for the structural page layout.
$numLeading = $params->def('num_leading_articles', 1);
$numIntro = $params->def('num_intro_articles', 4);
$numLinks = $params->def('num_links', 4);
// Compute the article slugs and prepare introtext (runs content plugins).
for ($i = 0, $n = count($items); $i < $n; $i++)
{
$item = & $items[$i];
$item->slug = $item->alias ? ($item->id . ':' . $item->alias) : $item->id;
// No link for ROOT category
if ($item->parent_alias == 'root')
{
$item->parent_slug = null;
}
$item->catslug = $item->category_alias ? ($item->catid . ':' . $item->category_alias) : $item->catid;
$item->event = new stdClass();
$dispatcher = JDispatcher::getInstance();
// Old plugins: Ensure that text property is available
if (!isset($item->text))
{
$item->text = $item->introtext;
}
JPluginHelper::importPlugin('content');
$results = $dispatcher->trigger('onContentPrepare', array(
'com_content.category', &$item, &$this->params,
0
));
// Old plugins: Use processed text as introtext
$item->introtext = $item->text;
$results = $dispatcher->trigger('onContentAfterTitle', array(
'com_content.category', &$item, &$item->params,
0
));
$item->event->afterDisplayTitle = trim(implode("\n", $results));
$results = $dispatcher->trigger('onContentBeforeDisplay', array(
'com_content.category', &$item, &$item->params,
0
));
$item->event->beforeDisplayContent = trim(implode("\n", $results));
$results = $dispatcher->trigger('onContentAfterDisplay', array(
'com_content.category', &$item, &$item->params,
0
));
$item->event->afterDisplayContent = trim(implode("\n", $results));
}
// Check for layout override only if this is not the active menu item
// If it is the active menu item, then the view and category id will match
$active = $app->getMenu()->getActive();
if ((!$active) || ((strpos($active->link, 'view=category') === false) || (strpos($active->link, '&id=' . (string)$category->id) === false)))
{
// Get the layout from the merged category params
if ($layout = $category->params->get('category_layout'))
{
$this->setLayout($layout);
}
}
// At this point, we are in a menu item, so we don't override the layout
elseif (isset($active->query['layout']))
{
// We need to set the layout from the query in case this is an alternative menu item (with an alternative layout)
$this->setLayout($active->query['layout']);
}
// For blog layouts, preprocess the breakdown of leading, intro and linked articles.
// This makes it much easier for the designer to just interrogate the arrays.
if (($params->get('layout_type') == 'blog') || ($this->getLayout() == 'blog'))
{
$max = count($items);
// The first group is the leading articles.
$limit = $numLeading;
for ($i = 0; $i < $limit && $i < $max; $i++)
{
$this->lead_items[$i] = & $items[$i];
}
// The second group is the intro articles
. $limit = $numLeading + $numIntro;
// Order articles across, then down (or single column mode)
for ($i = $numLeading; $i < $limit && $i < $max; $i++)
{
$this->intro_items[$i] = & $items[$i];
}
$this->columns = max(1, $params->def('num_columns', 1));
$order = $params->def('multi_column_order', 1);
if ($order == 0 && $this->columns > 1)
{
// call order down helper
$this->intro_items = ContentHelperQuery::orderDownColumns($this->intro_items, $this->columns);
}
$limit = $numLeading + $numIntro + $numLinks;
// The remainder are the links.
for ($i = $numLeading + $numIntro; $i < $limit && $i < $max; $i++)
{
$this->link_items[$i] = & $items[$i];
}
}
$children = array(
$category->id => $children
);
// Escape strings for HTML output
$this->pageclass_sfx = htmlspecialchars($params->get('pageclass_sfx'));
$this->maxLevel = $params->get('maxLevel', -1);
$this->assignRef('state', $state);
$this->assignRef('items', $items);
$this->assignRef('category', $category);
$this->assignRef('children', $children);
$this->assignRef('params', $params);
$this->assignRef('parent', $parent);
$this->assignRef('pagination', $pagination);
$this->assignRef('user', $user);
$this->_prepareDocument();
parent::display($tpl);
}
/** * Prepares the document */
protected
function _prepareDocument()
{
$app = JFactory::getApplication();
$menus = $app->getMenu();
$pathway = $app->getPathway();
$title = null;
// Because the application sets a default page title,
// we need to get it from the menu item itself
$menu = $menus->getActive();
if ($menu)
{
$this->params->def('page_heading', $this->params->get('page_title', $menu->title));
}
else
{
$this->params->def('page_heading', JText::_('JGLOBAL_ARTICLES'));
}
$id = (int)@$menu->query['id'];
if ($menu && ($menu->query['option'] != 'com_content' || $menu->query['view'] == 'article' || $id != $this->category->id))
{
$path = array(
array(
'title' => $this->category->title,
'link' => ''
)
);
$category = $this->category->getParent();
while (($menu->query['option'] != 'com_content' || $menu->query['view'] == 'article' || $id != $category->id) && $category->id > 1)
{
$path[] = array(
'title' => $category->title,
'link' => ContentHelperRoute::getCategoryRoute($category->id)
);
$category = $category->getParent();
}
$path = array_reverse($path);
foreach($path as $item)
{
$pathway->addItem($item['title'], $item['link']);
}
}
$title = $this->params->get('page_title', '');
if (empty($title))
{
$title = $app->getCfg('sitename');
}
elseif ($app->getCfg('sitename_pagetitles', 0) == 1)
{
$title = JText::sprintf('JPAGETITLE', $app->getCfg('sitename') , $title);
}
elseif ($app->getCfg('sitename_pagetitles', 0) == 2)
{
$title = JText::sprintf('JPAGETITLE', $title, $app->getCfg('sitename'));
}
$this->document->setTitle($title);
$this->document->setTitle($title);
// #####################ADDS OG TAGS##############################
$this->document->addCustomTag('<meta property="og:site_name" content="ClearLove" />');
$this->document->addCustomTag('<meta property="og:title" content="' . $title . '" />');
$this->document->addCustomTag('<meta property="og:url" content="' . JURI::current() . '" />');
if ($this->category->ogimages)
{
$ogimages = $this->category->ogimages;
}
elseif (!$this->category->ogimages && $this->params->get('menu-meta_ogimages'))
{
$ogimages = $this->params->get("menu-meta_ogimages");
}
elseif ($app->getCfg("ogimages"))
{
$ogimages = $app->getCfg("ogimages");
}
// #####################ADDS OG TAGS FOR DESC##############################
if ($this->category->metadesc)
{
$this->document->setDescription($this->category->metadesc);
$this->document->addCustomTag('<meta property="og:description" content="' . $this->category->metadesc . '" />');
}
elseif (!$this->category->metadesc && $this->params->get('menu-meta_description'))
{
$this->document->setDescription($this->params->get('menu-meta_description'));
$this->document->addCustomTag('<meta property="og:description" content="' . $this->params->get("menu-meta_description") . '" />');
}
elseif ($app->getCfg("MetaDesc"))
{
$this->document->addCustomTag('<meta property="og:description" content="' . $app->getCfg("MetaDesc") . '" />');
}
// #####################ADDS OG TAGS FOR IMAGE##############################
if (!preg_match("/http:\/\//", $ogimages) && !("www." == substr($ogimages, 0, 4)) && $ogimages)
{
$ogimages = 'http://www.clearlove.ca/' . $ogimages;
}
if ($ogimages)
{
$ogimage_atribs = getimagesize($ogimages);
$this->document->addCustomTag('<meta property="og:image" content="' . $ogimages . '" />');
$this->document->addCustomTag('<meta property="og:image:type" content="' . image_type_to_mime_type($ogimage_atribs[2]) . '" />');
$this->document->addCustomTag('<meta property="og:image:width" content="' . $ogimage_atribs[0] . '" />');
$this->document->addCustomTag('<meta property="og:image:height" content="' . $ogimage_atribs[1] . '" />');
}
// #####################DONE ADDING TAGS##############################
if ($this->category->metakey)
{
$this->document->setMetadata('keywords', $this->category->metakey);
}
elseif (!$this->category->metakey && $this->params->get('menu-meta_keywords'))
{
$this->document->setMetadata('keywords', $this->params->get('menu-meta_keywords'));
}
if ($this->params->get('robots'))
{
$this->document->setMetadata('robots', $this->params->get('robots'));
}
if ($app->getCfg('MetaAuthor') == '1')
{
$this->document->setMetaData('author', $this->category->getMetadata()->get('author'));
}
$mdata = $this->category->getMetadata()->toArray();
foreach($mdata as $k => $v)
{
if ($v)
{
$this->document->setMetadata($k, $v);
}
}
// Add feed links
if ($this->params->get('show_feed_link', 1))
{
$link = '&format=feed&limitstart=';
$attribs = array(
'type' => 'application/rss+xml',
'title' => 'RSS 2.0'
);
$this->document->addHeadLink(JRoute::_($link . '&type=rss') , 'alternate', 'rel', $attribs);
$attribs = array(
'type' => 'application/atom+xml',
'title' => 'Atom 1.0'
);
$this->document->addHeadLink(JRoute::_($link . '&type=atom') , 'alternate', 'rel', $attribs);
}
}
}