string, 'rows' => [['label'=>.., 'value'=>..], ...], 'note' => string]
$paymentInstructions = (isset($payment_instructions) && is_array($payment_instructions)) ? $payment_instructions : [];
// Optional logo + header colour supplied by the White Label module.
// Unbranded sites keep this document's original header colour and show no logo.
$pdfBranding = function_exists('yatra_get_pdf_branding')
? yatra_get_pdf_branding('#1e40af')
: ['logo_url' => '', 'header_color' => '#1e40af'];
$brandLogoUrl = (string) ($pdfBranding['logo_url'] ?? '');
$brandHeaderColor = (string) ($pdfBranding['header_color'] ?? '#1e40af');
?>
<?php echo esc_html__('Invoice', 'yatra'); ?> - <?php echo htmlspecialchars($paymentRef, ENT_QUOTES, 'UTF-8'); ?>