написать файл PDF на арабском языке, используя переполнение стека

Я добавил PHP-код для создания PDF-файла на арабском и английском языках, но когда контент на арабском языке, он выглядит примерно так:

Я проверил, шрифт, который я использую, совместим с арабским языком. Я не уверен, что мне не хватает. У меня также есть Unicode, чтобы быть UTF-8 в моем файле конфигурации.
вот код

<?php
$paid_amount = $this->invoice_model->calculate_to('paid_amount', $invoice_info->invoices_id);
$client_info = $this->invoice_model->check_by(array('client_id' => $invoice_info->client_id), 'tbl_client');
if (!empty($client_info)) {
$currency = $this->invoice_model->client_currency_sambol($invoice_info->client_id);
$client_lang = $client_info->language;
} else {
$client_lang = 'arabic';
$currency = $this->invoice_model->check_by(array('code' => config_item('default_currency')), 'tbl_currencies');
}

unset($this->lang->is_loaded[5]);
$language_info = $this->lang->load('sales_lang', $client_lang, TRUE, FALSE, '', TRUE);
$payment_status = $this->invoice_model->get_payment_status($invoice_info->invoices_id);

$uri = $this->uri->segment(3);
if ($uri == 'invoice_email') {
$img = base_url() . config_item('invoice_logo');
} else {
$img = $_SERVER['DOCUMENT_ROOT'] . '/' . config_item('invoice_logo');
$a = file_exists($img);
if (empty($a)) {
$img = base_url() . config_item('invoice_logo');
}
}
?>

<table class="clearfix">
<tr>
<td>
<div id="logo" style="margin-top: 8px;">
<img style=" height: 70px;" src="<?= $img ?>">
</div>
</td>
<td>
<div id="company">
<h2 class="name"><?= (config_item('company_legal_name_' . $client_lang) ? config_item('company_legal_name_' . $client_lang) : config_item('company_legal_name')) ?></h2>

<div><?= (config_item('company_address_' . $client_lang) ? config_item('company_address_' . $client_lang) : config_item('company_address')) ?></div>

<div><?= (config_item('company_city_' . $client_lang) ? config_item('company_city_' . $client_lang) : config_item('company_city')) ?>
, <?= config_item('company_zip_code') ?></div>

<div><?= (config_item('company_country_' . $client_lang) ? config_item('company_country_' . $client_lang) : config_item('company_country')) ?></div>
<div> <?= config_item('company_phone') ?></div>
<div><a href="mailto:<?= config_item('company_email') ?>"><?= config_item('company_email') ?></a></div>

</div>
</td>
</tr>
</table>

<table id="details" class="clearfix">
<tr>
<td>
<div id="client">
<?php
if (!empty($client_info)) {
$client_name = $client_info->name;
$address = $client_info->address;
$city = $client_info->city;
$zipcode = $client_info->zipcode;
$country = $client_info->country;
$phone = $client_info->phone;
$email = $client_info->email;
} else {
$client_name = '-';
$address = '-';
$city = '-';
$zipcode = '-';
$country = '-';
$phone = '-';
$email = '-';
}
?>
<h2 class="name"><?= $client_name ?></h2>
<div class="address"><?= $address ?></div>
<div class="address"><?= $city ?>, <?= $zipcode ?>
,<?= $country ?></div>
<div class="address"><?= $phone ?></div>
<div class="email"><a href="mailto:<?= $email ?>"><?= $email ?></a></div>
</div>
</td>
<td>
<div id="invoice">
<h1><?= $invoice_info->reference_no ?></h1>
<div class="date"><?= $language_info['invoice_date'] ?>
:<?= strftime(config_item('date_format'), strtotime($invoice_info->invoice_date)); ?></div>
<div class="date"><?= $language_info['due_date'] ?>
:<?= strftime(config_item('date_format'), strtotime($invoice_info->due_date)); ?></div>
<?php if (!empty($invoice_info->user_id)) { ?>
<div class="date">
<?= lang('sales') . ' ' . lang('agent') ?><?php
$profile_info = $this->db->where('user_id', $invoice_info->user_id)->get('tbl_account_details')->row();
if (!empty($profile_info)) {
echo $profile_info->fullname;
}
?>
</div>
<?php } ?>
<div class="date"><?= $language_info['payment_status'] ?>: <?= $payment_status ?></div>
</div>
</td>
</tr>
</table>

<table class="items" border="0" cellspacing="0" cellpadding="0" page-break-inside: auto;>
<thead>
<tr>
<th class="desc"><?= $language_info['items'] ?></th>
<?php
$invoice_view = config_item('invoice_view');
if (!empty($invoice_view) && $invoice_view == '2') {
?>
<th><?= $language_info['hsn_code'] ?></th>
<?php } ?>
<th class="unit"><?= $language_info['qty'] ?></th>
<th class="desc"><?= $language_info['price'] ?></th>
<th class="unit"><?= $language_info['tax'] ?></th>
<th class="total"><?= $language_info['total'] ?></th>
</tr>
</thead>
<tbody>
<?php
$invoice_items = $this->invoice_model->ordered_items_by_id($invoice_info->invoices_id);

if (!empty($invoice_items)) :
foreach ($invoice_items as $key => $v_item) :
$item_name = $v_item->item_name ? $v_item->item_name : $v_item->item_desc;
$item_tax_name = json_decode($v_item->item_tax_name);
?>
<tr>
<td class="desc"><h3><?= $item_name ?></h3><?= nl2br($v_item->item_desc) ?></td>
<?php
$invoice_view = config_item('invoice_view');
if (!empty($invoice_view) && $invoice_view == '2') {
?>
<td><?= $v_item->hsn_code ?></td>
<?php } ?>
<td class="unit"><?= $v_item->quantity . '   ' . $v_item->unit ?></td>
<td class="desc"><?= display_money($v_item->unit_cost) ?></td>
<td class="unit"><?php
if (!empty($item_tax_name)) {
foreach ($item_tax_name as $v_tax_name) {
$i_tax_name = explode('|', $v_tax_name);
echo '<small class="pr-sm">' . $i_tax_name[0] . ' (' . $i_tax_name[1] . ' %)' . '</small>' . display_money($v_item->total_cost / 100 * $i_tax_name[1]) . ' <br>';
}
}
?></td>
<td class="total"><?= display_money($v_item->total_cost) ?></td>
</tr>
<?php endforeach; ?>
<?php endif ?>

</tbody>
<tfoot>
<tr class="total">
<td colspan="3"></td>
<td colspan="1"><?= $language_info['sub_total'] ?></td>
<td><?= display_money($this->invoice_model->calculate_to('invoice_cost', $invoice_info->invoices_id)) ?></td>
</tr>
<?php if ($invoice_info->discount_total > 0): ?>
<tr class="total">
<td colspan="3"></td>
<td colspan="1"><?= $language_info['discount'] ?>(<?php echo $invoice_info->discount_percent; ?>%)</td>
<td> <?= display_money($this->invoice_model->calculate_to('discount', $invoice_info->invoices_id)) ?></td>
</tr>
<?php endif;
$tax_info = json_decode($invoice_info->total_tax);
$tax_total = 0;
if (!empty($tax_info)) {
$tax_name = $tax_info->tax_name;
$total_tax = $tax_info->total_tax;
if (!empty($tax_name)) {
foreach ($tax_name as $t_key => $v_tax_info) {
$tax = explode('|', $v_tax_info);
$tax_total += $total_tax[$t_key];
?>
<tr class="total">
<td colspan="3"></td>
<td colspan="1"><?= $tax[0] . ' (' . $tax[1] . ' %)' ?></td>
<td> <?= display_money($total_tax[$t_key]); ?></td>
</tr>
<?php }
}
} ?>
<?php if ($tax_total > 0): ?>
<tr class="total">
<td colspan="3"></td>
<td colspan="1"><?= $language_info['total'] . ' ' . $language_info['tax'] ?></td>
<td><?= display_money($tax_total); ?></td>
</tr>
<?php endif;
if ($invoice_info->adjustment > 0): ?>
<tr class="total">
<td colspan="3"></td>
<td colspan="1"><?= $language_info['adjustment'] ?></td>
<td><?= display_money($invoice_info->adjustment); ?></td>
</tr>
<?php endif ?>
<tr class="total">
<td colspan="3"></td>
<td colspan="1"><?= $language_info['total'] ?></td>
<td><?= display_money($this->invoice_model->calculate_to('total', $invoice_info->invoices_id), $currency->symbol); ?></td>
</tr>
<?php
$paid_amount = $this->invoice_model->calculate_to('paid_amount', $invoice_info->invoices_id);
if ($paid_amount > 0) {
$total = $language_info['total_due'];
if ($paid_amount > 0) {
$text = 'style="color:red"';
?>
<tr class="total">
<td colspan="3"></td>
<td colspan="1"><?= $language_info['paid_amount'] ?></td>
<td><?= $paid_amount ?></td>
</tr>
<?php } else {
$text = '';
} ?>
<tr class="total">
<td colspan="3"></td>
<td colspan="1"><span <?= $text ?>><?= $total ?></span></td>
<td><?= display_money($this->invoice_model->calculate_to('invoice_due', $invoice_info->invoices_id), $currency->symbol); ?></td>
</tr>
<?php } ?>
</tfoot>
</table>
<div id="thanks"><?= lang('thanks') ?>!</div>
<div id="notices">
<div class="notice"><?= $invoice_info->notes ?></div>
</div>
<?php
$invoice_view = config_item('invoice_view');
if (!empty($invoice_view) && $invoice_view > 0) {
?>
<style type="text/css">
.panel {
margin-bottom: 21px;
background-color: #ffffff;
border: 1px solid transparent;
-webkit-box-shadow: 0 1px 1px rgba(0, 0, 0, 0.05);
box-shadow: 0 1px 1px rgba(0, 0, 0, 0.05);
}

.panel-custom .panel-heading {
border-bottom: 2px solid #2b957a;
}

.panel .panel-heading {
border-bottom: 0;
font-size: 14px;
}

.panel-heading {
padding: 10px 15px;
border-bottom: 1px solid transparent;
border-top-right-radius: 3px;
border-top-left-radius: 3px;
}

.panel-title {
margin-top: 0;
margin-bottom: 0;
font-size: 16px;
}
</style>
<div class="panel panel-custom" style="margin-top: 20px">
<div class="panel-heading" style="border:1px solid #dde6e9;border-bottom: 2px solid #57B223;">
<div class="panel-title"><?= lang('tax_summary') ?></div>
</div>
<table class="items" border="0" cellspacing="0" cellpadding="0" page-break-inside: auto;>
<thead>
<tr>
<th class="desc"><?= $language_info['items'] ?></th>
<?php
$invoice_view = config_item('invoice_view');
if (!empty($invoice_view) && $invoice_view == '2') {
?>
<th><?= lang('hsn_code') ?></th>
<?php } ?>
<th class="unit"><?= $language_info['qty'] ?></th>
<th class="desc"><?= $language_info['tax'] ?></th>
<th class="unit" style="text-align: right"><?= $language_info['total_tax'] ?></th>
<th class="total" style="text-align: right"><?= $language_info['tax_excl_amt'] ?></th>
</tr>
</thead>
<tbody>
<?php
$total_tax = 0;
$total_cost = 0;
if (!empty($invoice_items)) :
foreach ($invoice_items as $key => $v_item) :
$item_tax_name = json_decode($v_item->item_tax_name);
$tax_amount = 0;
?>
<tr>
<td class="desc"><?= $v_item->item_name ?></td>
<?php
$invoice_view = config_item('invoice_view');
if (!empty($invoice_view) && $invoice_view == '2') {
?>
<td><?= $v_item->hsn_code ?></td>
<?php } ?>
<td class="unit"><?= $v_item->quantity . '   ' . $v_item->unit ?></td>
<td class="desc"><?php
if (!empty($item_tax_name)) {
foreach ($item_tax_name as $v_tax_name) {
$i_tax_name = explode('|', $v_tax_name);
$tax_amount += $v_item->total_cost / 100 * $i_tax_name[1];
echo '<small class="pr-sm">' . $i_tax_name[0] . ' (' . $i_tax_name[1] . ' %)' . '</small>' . display_money($v_item->total_cost / 100 * $i_tax_name[1]) . ' <br>';
}
}
$total_cost += $v_item->total_cost;
$total_tax += $tax_amount;
?></td>
<td class="unit" style="text-align: right"><?= display_money($tax_amount) ?></td>
<td class="total" style="text-align: right"><?= display_money($v_item->total_cost) ?></td>
</tr>
<?php endforeach; ?>
<?php endif ?>

</tbody>
<tfoot>
<tr class="total">
<td colspan="3"></td>
<td><?= $language_info['total'] ?></td>
<td><?= display_money($total_tax) ?></td>
<td><?= display_money($total_cost) ?></td>
</tr>
</tfoot>
</table>
</div>
<?php } ?>
<footer>
<?= config_item('invoice_footer') ?>
</footer>