Blank Page after Placing an Order

[sle39lvr]

Customers get following message on a blank screen after hitting order submit button:

'WARNING: An error occurred. Please refresh the page and try again"

The actual order DOES go thru and I also get the order confirmation email. I am using Paypal payment modules, which handle transactions without any errors.

When I look in to the error logs, I have following errors:


[12-Apr-2016 13:09:41 America/New_York] PHP Warning: Illegal string offset 'cost' in /home/*****/public_html/includes/classes/order.php on line 355

[12-Apr-2016 13:19:58 America/New_York] PHP Fatal error: 1146:Table '******.zen_orders' doesn't exist :: SELECT * FROM zen_orders
WHERE orders_id = 7968
LIMIT 1 in /home/******/public_html/includes/classes/db/mysql/query_factory.php on line 120

[12-Apr-2016 13:20:05 America/New_York] PHP Warning: Creating default object from empty value in /home/*****/public_html/ipn_main_handler.php on line 354
[12-Apr-2016 13:20:05 America/New_York] ERROR: Failed sending email to: " " <> with subject: "Order Confirmation No: 7969" (failed validation)

[12-Apr-2016 13:30:34 America/New_York] PHP Warning: Creating default object from empty value in /home/*****/public_html/includes/modules/shipping_estimator.php on line 92

[sle39lvr]

/home/*****/public_html/includes/classes/order.php

   $this->info = array('order_status' => DEFAULT_ORDERS_STATUS_ID,
                        'currency' => $_SESSION['currency'],
                        'currency_value' => $currencies->currencies[$_SESSION['currency']]['value'],
                        'payment_method' => $GLOBALS[$class]->title,
                        'payment_module_code' => $GLOBALS[$class]->code,
                        'coupon_code' => $coupon_code->fields['coupon_code'],
    //                          'cc_type' => (isset($GLOBALS['cc_type']) ? $GLOBALS['cc_type'] : ''),
    //                          'cc_owner' => (isset($GLOBALS['cc_owner']) ? $GLOBALS['cc_owner'] : ''),
    //                          'cc_number' => (isset($GLOBALS['cc_number']) ? $GLOBALS['cc_number'] : ''),
    //                          'cc_expires' => (isset($GLOBALS['cc_expires']) ? $GLOBALS['cc_expires'] : ''),
    //                          'cc_cvv' => (isset($GLOBALS['cc_cvv']) ? $GLOBALS['cc_cvv'] : ''),
                        'shipping_method' => (is_array($_SESSION['shipping']) ? $_SESSION['shipping']['title'] : $_SESSION['shipping']),
                        'shipping_module_code' => (isset($_SESSION['shipping']['id']) && strpos($_SESSION['shipping']['id'], '_') > 0 ? $_SESSION['shipping']['id'] : $_SESSION['shipping']),
                        'shipping_cost' => $_SESSION['shipping']['cost'],
                        'subtotal' => 0,
                        'shipping_tax' => 0,
                        'tax' => 0,
                        'total' => 0,
                        'tax_groups' => array(),
                        'comments' => (isset($_SESSION['comments']) ? $_SESSION['comments'] : ''),
                        'ip_address' => $_SESSION['customers_ip_address'] . ' - ' . $_SERVER['REMOTE_ADDR']
                        );

Line 355 is:

'shipping_cost' => $_SESSION['shipping']['cost'],

[sle39lvr]

/home/******/public_html/includes/classes/db/mysql/query_factory.php

  function show_error() {
    if ($this->error_number == 0 && $this->error_text == DB_ERROR_NOT_CONNECTED && !headers_sent() && file_exists('nddbc.html') ) include('nddbc.html');
    echo '<div class="systemError">';
    if (defined('STRICT_ERROR_REPORTING') && STRICT_ERROR_REPORTING == true) 
    {
      echo $this->error_number . ' ' . $this->error_text;
      echo '<br />in:<br />[' . (strstr($this->zf_sql, 'db_cache') ? 'db_cache table' : $this->zf_sql) . ']<br />';
    } else {
      echo 'WARNING: An Error occurred, please refresh the page and try again.';	
    }
    trigger_error($this->error_number . ':' . $this->error_text . ' :: ' . $this->zf_sql, E_USER_ERROR);
    if (defined('IS_ADMIN_FLAG') && IS_ADMIN_FLAG==true) echo 'If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.<br />';
    echo '</div>';
  }

Line 120 is:

trigger_error($this->error_number . ':' . $this->error_text . ' :: ' . $this->zf_sql, E_USER_ERROR);

[sle39lvr]

/home/*****/public_html/ipn_main_handler.php

       ipn_debug_email('Breakpoint: 5k - OSH update done');
        $order->create_add_products($insert_id, 2);
        ipn_debug_email('Breakpoint: 5L - adding products');
        $_SESSION['order_number_created'] = $insert_id;
        $GLOBALS[$_SESSION['payment']]->transaction_id = $_POST['txn_id'];
        $zco_notifier->notify('NOTIFY_CHECKOUT_PROCESS_AFTER_ORDER_CREATE_ADD_PRODUCTS');
        $order->send_order_email($insert_id, 2);
        ipn_debug_email('Breakpoint: 5m - emailing customer');
        $zco_notifier->notify('NOTIFY_CHECKOUT_PROCESS_AFTER_SEND_ORDER_EMAIL');

Line 354:

        $GLOBALS[$_SESSION['payment']]->transaction_id = $_POST['txn_id'];

[DrByte]

[12-Apr-2016 13:09:41 America/New_York] PHP Warning: Illegal string offset 'cost' in /home/*****/public_html/includes/classes/order.php on line 355

That's a result of using PHP 5.4 or newer with an old version of Zen Cart that was designed before PHP 5.4 was created.
In modern versions of Zen Cart there are a lot of arrays that have been updated and improved for compatibility with modern PHP versions. You need to upgrade your Zen Cart if you're going to continue upgrading your PHP.

[12-Apr-2016 13:30:34 America/New_York] PHP Warning: Creating default object from empty value in /home/*****/public_html/includes/modules/shipping_estimator.php on line 92

I'm pretty sure this one is also related to the PHP version mismatch.

[sle39lvr]

Understood.

[DrByte]

Customers get following message on a blank screen after hitting order submit button:

'WARNING: An error occurred. Please refresh the page and try again"

[12-Apr-2016 13:19:58 America/New_York] PHP Fatal error: 1146:Table '******.zen_orders' doesn't exist :: SELECT * FROM zen_orders
WHERE orders_id = 7968
LIMIT 1 in /home/******/public_html/includes/classes/db/mysql/query_factory.php on line 120

That fatal error is the cause of the blank screen.

Chances are you've got some custom code or poorly-written plugins that are looking for a table named "zen_orders" when the rest of your site is using tables names without the "zen_" prefix on those tables.

Normally one would use the PHP constant named TABLE_ORDERS to properly combine the global table-prefix value with the expected table name suffix instead of presupposing the actual table name.

In this case the query_factory.php file is only the messenger. It's only executing the query, not preparing it. I'm guessing that you've got something added to your site to do extra "stuff" after orders are created. This could mean custom code in a lot of places, such as:
/includes/modules/pages/checkout_process/*.php
/includes/modules/pages/checkout_success/*.php
/includes/classes/observers/*.php
/includes/templates/your_template_name/templates/tpl_checkout_success_default.php
and perhaps others.

[lat9]

You could install the myDebug Backtrace plugin to see where the mal-formed call to the queryFactory class is coming from.

[sle39lvr]

Just updated to 1.5.5. The issue still exists.

[carlwhat]

you need to post the contents of your error logs.

in addition, i think the problem is still related to the sql statement: "select * from zen_orders... "

can you track down what file contains that bit of code and post its contents?