WHMCS Show Credit Balance on side panel/sidebar

whmcs-show-credit-balance.php

<?php
/**
 * code goes inside "includes/hooks" directory
*/
//for customizing nav menu items
use WHMCS\View\Menu\Item as MenuItem;

//for interacting with DB
use Illuminate\Database\Capsule\Manager as Capsule;

/**
 * Show Credit Balance on side panel/sidebar
 * @param MenuItem $primarySidebar
 */
function dctit_show_available_credit_balance_sidebar (MenuItem $primarySidebar) {
    $filename = basename($_SERVER['REQUEST_URI'], ".php");
    $parseFile = explode('.', $filename);

    $client = Menu::context("client");
    $clientid = intval($client->id);

    if ($parseFile['0'] !== 'clientarea' || $clientid === 0) return;
    if ( $client->credit <= 0 ) return;

    $primarySidebar->addChild('Client-Balance', array(
        'label' => 'Credit Balance',
        'uri' => '#',
        'order' => '1',
        'icon' => 'far fa-money-bill'
    ));

    # Get Currency
    $getCurrency = Capsule::table('tblcurrencies')->where('id', $client->currency)->get();

    # Retrieve the panel we just created.
    $balancePanel = $primarySidebar->getChild('Client-Balance');

    // Move the panel to the end of the sorting order so it's always displayed
    // as the last panel in the sidebar.
    $balancePanel->moveToBack();
    $balancePanel->setOrder(0);

    # Add Balance.
    $balancePanel->addChild('balance-amount', array(
        'label' => '<div style="margin: 10px; font-size: 20px;color: #369;" align="center">' . $getCurrency['0']->prefix . $client->credit . ' ' . $getCurrency['0']->suffix . '</div>',
        'order' => 1
    ));

    $balancePanel->setFooterHtml(
            '<a href="clientarea.php?action=addfunds" class="btn btn-success btn-sm btn-block">
            <i class="fa fa-plus"></i> Add Funds
        </a>'
    );
}
add_hook('ClientAreaPrimarySidebar', 1, 'dctit_show_available_credit_balance_sidebar');