變量在where子句php joomla中不起作用

Question

我有功能，但我的功能運作良好，只有我不明白這一點：

<?php

// $category output is 23 when I echo $category; and there is no records
->where('d.category_id = ' . (int) $category)

// also this method not work
->where('d.category_id = ' . $category)

// but this method works 
->where('d.category_id = 23')

?>

這是完整的代碼：

$category = $params->get('title');

//echo $category;

public static function getSuggested($category) {


$db    = JFactory::getDBO();
$query = $db->getQuery(true);

//$now      = $jdate->toSql();
//$nullDate = $db->quote($db->getNullDate());

$query->select('d.*');
$query->from('#__deals_deals AS d');

$query->select('c.title AS category_title');
$query->join('LEFT', '#__deals_categories AS c ON c.id = d.category_id')
->where('(d.is_market = 0 AND d.state = 1)','AND')
->where('d.category_id = 23')
->order('id DESC');

//$query->where('(d.publish_up = ' . $nullDate . ' OR d.publish_up <= ' . $query->quote($now) . ')');
//$query->where('(d.publish_down = ' . $nullDate . ' OR d.publish_down >= ' . $query->quote($now) . ')');   
$db->setQuery($query,0,10); 

$results = $db->loadObjectList();

return $results;

}

此功能運行良好，只需要獲取類別數據即可。 這是joomla模塊，此功能位於default.php文件的helper.php文件中。

我找到了解決方案：

加入mod_suggested_deals.php

$category = (int) $params->get('fieldvalue'); 

然后：

$results = modsuggested_dealsHelper::getSuggested($category);

Answer 1

您所做的錯誤是您在函數外部定義變量值，但在函數內部調用變量。 如果您的類不是抽象類，則可以使用$this->category如果您的類是抽象類，則可以在函數內部使用$ category變量，如下所示

public static function getSuggested() {

  $module = JModuleHelper::getModule('mod_yourmodulename');
  $catid = new JRegistry($module->params);
  $category = (int) $catid['title'];


$db    = JFactory::getDBO();
$query = $db->getQuery(true);

//$now      = $jdate->toSql();
//$nullDate = $db->quote($db->getNullDate());

$query->select('d.*');
$query->from('#__deals_deals AS d');

$query->select('c.title AS category_title');
$query->join('LEFT', '#__deals_categories AS c ON c.id = d.category_id')
->where('(d.is_market = 0 AND d.state = 1)','AND')
->where('d.category_id = '.$category)
->order('id DESC');

//$query->where('(d.publish_up = ' . $nullDate . ' OR d.publish_up <= ' . $query->quote($now) . ')');
//$query->where('(d.publish_down = ' . $nullDate . ' OR d.publish_down >= ' . $query->quote($now) . ')');   
$db->setQuery($query,0,10); 

$results = $db->loadObjectList();

return $results;

}

Answer 2

我發現這個問題的解決方案：

在我的函數中我添加參數$ category

public static function getSuggested($category) {...}

在mod_suggested_deals.php中，我添加代碼：

$category = $params->get('title');

然后是代碼（已經在這里了）。

$results = modsuggested_dealsHelper::getSuggested($category);