PHP ForEach loop doesn't iterate / count - php

Question

I'm trying to return a value to an android application in JSON format using a web service. For some reason, my code is only returning "Invalid login, please try again". I'm positive that the username is being entered, and I'm positive the tasks are returning properly. Using test code, which I've included as commented lines, I verify that the service will return one set of data to the application. It appears that the problem is with my foreach loop, but I don't see how. It's pretty simple stuff. Obviously it isn't iterating, or my count would be increasing and I wouldn't receive the Invalid Login error. The only thing I can figure is that I would need to use a nest foreach loop, but I haven't had much success with that, either.
Thanks in advance for the help, guys!
Here is the foreach loop...
//for reach task returned, add to array for later output
foreach ($row2['Description'] as $t)
{
$taskDisplay = array('task' => $t);
$taskCount++;
}
and the count...
if ($taskCount > 0)
{
echo json_encode($taskDisplay);
}
else
{
echo "Invalid login, please try again";
}
here is the code in full
$taskDisplay = array();
$taskCount = 0;
//do this portion if app gives key value "PART_ONE"
if ($result['part'] == "PART_ONE")
{
//if username was entered, check user credentials
if(array_key_exists('user', $result)) {
$usercheck = $con->prepare("Select * from Employee
Where usr = ?
and pass = ?");
$usercheck -> execute(array($result['user'], $result['password']));
$row = $usercheck -> fetch();
//if username was verified, select tasks from database
if($row['usr'])
{
$task = $con->prepare("Select * from Tasks
where Assigned_Employee = ?");
$task -> execute(array($result['user']));
$row2 = $task -> fetch();
$statusCode = "Success";
//$taskDisplay = $row2['Description'];
//for reach task returned, add to array for later output
foreach ($row2['Description'] as $t)
{
$taskDisplay = array('task' => $t);
$taskCount++;
}
}
else
{
$statusCode = "Fail";
//bail if invalid username entered
exit;
}
//$arr = array('task' => $taskDisplay, 'status_code' => $statusCode);
//echo json_encode($arr);
if ($taskCount > 0)
{
echo json_encode($taskDisplay);
}
else
{
echo "Invalid login, please try again";
}
}
}

Answer 1

To foreach over all rows you'll want fetchAll(). Then you want to access the Description column in each row:
$row2 = $task->fetchAll();
// etc...
foreach ($row2 as $t)
{
$taskDisplay[] = array('task' => $t['Description']);
$taskCount++;
}