Cannot Get Table Values To Custom Page In Provisioning Module

[astoundant]

I'm new to creating provisioning modules, so please forgive if this is a stupid question.

In the Product Details page, I've setup 3 buttons that go to their corresponding secondary custom pages. On one of the secondary pages, I have a button to display a table when clicked, but I can't make it work. I've tried putting variables inside the Client Area function, and tried configuring a custom function and with no luck.

I used this post as well as reading the github documentation as best I could.

 Custom Function:

Quote

function mycustomprovision_customfunction($params)
{
    $pagearray = array(
        'templatefile' => 'templates/customfunction.tpl',
        'vars' => array(
            'var1' => 'demo1',
            'var2' => 'demo2',
        ),
    );
    return $pagearray;
    //get all rows
    try {
        $finalarray=array();
        $response=array();
        $i=1;
        while($row=mysqli_fetch_assoc($run))
        {        

            foreach($row as $rows)
            {
                $response = array(
                'field1'.$i => $row['userid'],
                'field2'.$i => $row['firstname'],
                'field3'.$i => $row['lastname'],
                );
            }
    
            $finalarray=$finalarray+$response;
            $i++;
} 
    
        return array(
            'tabOverviewReplacementTemplate' => $templateFile,
            'templateVariables' => $finalarray,
        ); 

Button:

Quote

<div class="row">
    <div class="col-sm-5">
        <form method="post" action="clientarea.php?action=productdetails">
        <input type="hidden" name="id" value="{$serviceid}" />
        <input type="hidden" name="modop" value="custom" />
        <input type="hidden" name="a" value="customfunction" />
        <input type="submit" value="Show Table" />
        </form>
    </div>

 

Template:

Quote

{$field1}
{$field2}
{$field3}

Thanks in advance.