试图找到在Joomla 2.5组件中提取数据库项的最佳方法

Question

I have a database which has 2 columns id and title. What is the best way for me to filter through these table values to display the matching title results when a user submits the id value in a form for a Joomla 2.5 component (admin view)?

When I look at the documentation here:

http://docs.joomla.org/Selecting_data_using_JDatabase

I see that by using Joomla's API I can use a shorthand to create this connection. I have tried:

$userSubmittedIDValue = $_GET["userSubmittedIDValue"];

// Get a db connection.
$db = JFactory::getDbo();

// Create a new query object.
$query = $db->getQuery(true);

$query
->select($db->quoteName(array('title')))
->from($db->quoteName('#__mycomponent_table'))
->where($db->quoteName('id') . ' = '. $db->quote('$userSubmittedIDValue'))

$results = $db->loadObjectList();

Unfortunately, this gives the following error:

Parse error: syntax error, unexpected T_VARIABLE

Then the error points to $results = $db->loadObjectList();

I just need to pull that value and apply it to a php variable so that I can use it as required. Any ideas?

---

Okay thanks to the first answer I have realized that I was missing a semi-colon. The trouble I am having now is still in pulling the value from the array using foreach . I have tried adding the following:

foreach (array($results) as $userSubmittedIDValue) {

echo $results;

}

But this just prints the word Array . I am getting close, but something is still off.

Answer 1

You're getting that error due to the fact you have a missing semi colon after your query.

So, change this:

->where($db->quoteName('id') . ' = '. $db->quote('$userSubmittedIDValue'))

to this:

->where($db->quoteName('id') . ' = '. $db->quote('$userSubmittedIDValue'));

Simply note the ; on the end

Once done, you can use a foreach loops to display your results.

So your final code to use would be this:

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

$query->select('*')
->from('#__mycomponent_table')
->where($db->quoteName('id') . ' = '. $db->quote($userSubmittedIDValue));

$db->setQuery($query);    
$rows = $db->loadObjectList();

foreach ($rows as $row) {
    echo $row->title;
}

I completely forgot to mention before that you also have to remove the single quote wrapped around $userSubmittedIDValue in the query as shown in my code above. Hope this helps