mPDF Output Function Explained

– `$mpdf`: This is an instance of the mPDF class, which is responsible for generating PDF documents.
– `Output(…)`: This method is called to output the generated PDF document.
– `$storagePath . '/' . $filename`: This constructs the full path where the PDF file will be saved. `$storagePath` should be a string containing the path to the directory where you want to save the file, and `$filename` is the name of the PDF file, including the `.pdf` extension.
– `'F'`: This parameter specifies that the output should be saved to a file (i.e., the path specified in the first argument).

**Output:**

The output of this line of code will be the PDF file being saved to the specified location on the server's file system. If the operation is successful, it will return a boolean `true`, and the PDF file will be created at the specified path. If there is an error (e.g., directory not writable), it may throw an exception or return `false`.

$filename=$pdfController->generateInvoice($cryptID,1);
$filesname[]=$filename;
//break;
}}
this cause error error for second pdf generate
Error in create zip reportUndefined array key "data""

1. **Check `generateInvoice` Method**:
Ensure that the `generateInvoice` method correctly handles the provided parameters and returns a valid filename for each call. Make sure that it does not return `null` or an empty value when generating the second PDF. If there's any conditional logic that could prevent the filename from being set, that could lead to this error.

Example check inside `generateInvoice`:

public function generateInvoice($cryptID, $param)
   {
       // Your logic for generating the PDF
       // Ensure that a valid filename is always returned
       $filename = 'your_generated_filename.pdf'; // Example
       
       return $filename; // Ensure this is valid
   }

2. **Inspect Data Structure**:
Ensure that wherever you use the `$files` or `$filesname` arrays later in your code, you are correctly checking if keys exist before accessing them. For example:

if (isset($filesname[$index])) {
       // Safe to use $filesname[$index]
   }

3. **Error Handling**:
Implement error handling in your loop to log or manage cases where `generateInvoice` might fail or return an unexpected result.

Example:

$filename = $pdfController->generateInvoice($cryptID, 1);
   if ($filename) {
       $filesname[] = $filename;
   } else {
       // Handle the error case, log it or set a default filename
       Log::error('Failed to generate PDF for ID: ' . $id);
   }

4. **Debugging Output**:
Add debugging statements to log the values returned from `generateInvoice`, or any relevant data structure, to see what might be causing the issue.

Example:

Log::info('Generating invoice for ID: ' . $id . ' | Encrypted ID: ' . $cryptID);

5. **Check the Loop Logic**:
If the loop is supposed to generate multiple PDFs, ensure that each iteration correctly processes without affecting the previous ones.

By reviewing these points, you should be able to identify and fix the source of the **"Undefined array key 'data'"** error in your PDF generation logic. If you have more details about the `generateInvoice` method or how you're using the `$files` or `$filesname` arrays later on, please share, and I can provide more specific advice.

$paymentID = Crypt::decrypt($paymentID);

$paymentDetails=Payments::find($paymentID);
$project_id=$paymentDetails->project_id;
$order_id=$paymentDetails->order_id;
$projects=Project::where(['id'=>$project_id])->first();

$getCorporatedesign = getCorporatedesign($project_id);
// pre($getCorporatedesign); die;

if($getCorporatedesign['details']) {
if($getCorporatedesign['details']['corporatedesign'] == 'client') {
$client_id = $getCorporatedesign['details']['id'] ?? '0';
$clientno = sprintf('%03d', $client_id);
} else {
$coach_id = $getCorporatedesign['details']['id'] ?? '0';
$clientno = sprintf('%03d', $coach_id);
}

$salutation = $getCorporatedesign['details']['salutation'];
$first_name = $getCorporatedesign['details']['first_name'];
$last_name = $getCorporatedesign['details']['last_name'];
$fullname = $salutation.' '.$first_name.' '.$last_name;

$company_name = $getCorporatedesign['details']['company_name'];
$address = ($getCorporatedesign['details']['address1'] ?? '')." ".($getCorporatedesign['details']['address2'] ?? '');
$city = $getCorporatedesign['details']['city'];
$zip_code = $getCorporatedesign['details']['zip_code'];
$country_id = $getCorporatedesign['details']['country_id'];
$country = getCountryName($country_id) ?? 'Germany';
}

$invoices=[];
$projectInvoiceDetails = $projects->paymentInvoiceDetails($paymentID);
$invoices[] = $projectInvoiceDetails;

$invoice_date = convertDateTimeToFormatDate($paymentDetails->transaction_date_time);
$invoice_number = date("Y/m/d",strtotime($paymentDetails->transaction_date_time))."/".$clientno.'/'.$paymentDetails->invoice_number;

// Manual Testing
$langId = 1; // 1: English, 3: German
$vat_comp = '';

$html="";

$html.="

<style>
body{ background:url(/img/invoice_bg.jpg) no-repeat center center; background-size: 1000px 500px;height:100vh;font-family: 'SwitzerRegular', sans-serif;}
        .table_invoice{ width:1080px; margin:100px auto 100px; font-family:'SwitzerRegular', sans-serif; font-size:16px; line-height:24px;padding:0px 40px}

        table.table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
        }
        table.table thead tr, table.table tfoot tr {
            background-color: white;
            border-radius: 20px;
            padding: 0px;
        }
        table.table thead tr th{text-align:left; padding:10px 5px}
        table.table tfoot tr td{text-align:left; padding:10px 5px; font-weight:bold;}  

        table.table  td{     color: #090607;}
  
        table.table  tbody tr {
            padding: 10px 0; 
        }

        table.table  tbody td {
            padding: 20px 5px; 
        }

        table.table  tbody tr + tr {
            margin-top: 10px; 
        }
      
        table.table thead th:first-child, tfoot td:first-child {
            border-top-left-radius: 20px;
            border-bottom-left-radius: 20px;
        }
        table.table thead th:last-child, table.table tfoot td:last-child {
            border-top-right-radius: 20px;
            border-bottom-right-radius: 20px;
        }
        table.table  tbody td {
            padding: 10px 20px;
        }
      
        .cardBtn{  color:#fff; color:#fff; font-size:24px; border-radius:30px; text-decoration:none;
            background:#1f75ff; padding:10px 40px; font-weight:bold;
        }
</style>

";
$html.='

';

if($langId == 1) {

$html .= '

##Company_Name##
'.$first_name.' '.$last_name.''.$address.''.$zip_code." ".$city.''.$country.'

INVOICE

Customer ID
'.$clientno.'

Invoice number
'.$invoice_number.'

Invoice date
'.$invoice_date.'
';
if($vat_comp!=''){
$html .= '
VAT
'.$vat_comp.'
';
}
$html .= '

Hi '.$fullname.'

Thank you for choosing feedback4you GmbH. We have prepared an invoice for the following services:

Service
Order ID
QTY
Price/unit
Net
VAT
Gross

';
$netTotal = '0';
$grossTotal = '0';
foreach ($invoices as $inv)
{
if(is_array($inv) && !is_null($inv))
{
$netTotal = ($inv['number_of_participants'] * $inv['perUnitPrice']);
$grossTotal = ($netTotal + $inv['vat_amount']);
if($inv['coupon_value'] > 0) {
$grossTotal = (($netTotal – $inv['coupon_value']) + $inv['vat_amount']);
}

$html .= '
'.$inv['project_name'].'
'.$inv['order_id'].'
'.$inv['number_of_participants'].'
'.euroFormat($inv['perUnitPrice'], true).'
'.euroFormat($netTotal, true).'
'.euroFormat($inv['vat_amount'], true).'
'.euroFormat($grossTotal, true).'
';
}
}
if($inv['coupon_value'] > 0) {
$html .= '

Coupon Applied
 
 
'.euroFormat($inv['coupon_value'], true).'
';
}
$html .= '

Total
'.euroFormat($netTotal, true).'
'.euroFormat($inv['vat_amount'], true).'
'.euroFormat($grossTotal, true).'

';

if($country!='Germany'){
$html .= 'Reverse-Charge';
}
$html .= ' The service date corresponds with the invoice date.
The payment will be processed through electronic payment method:

'.ucfirst($paymentDetails->payment_method).'

If you have any questions or require assistance, our customer service is here to help:
##Email##

This is an automatically generated invoice and is valid without a manual signature.

';
} else {
$html .= '

##Company_Name##
'.$first_name.' '.$last_name.''.$address.''.$zip_code." ".$city.''.$country.'

INVOICE

Kundennummer
'.$clientno.'

Rechnungsnummer
'.$invoice_number.'

Rechnungsdatum
'.$invoice_date.'
';
if($vat_comp!=''){
$html .= '
USt-IdNr.
'.$vat_comp.'
';
}
$html .= '

Hallo '.$fullname.'

Vielen Dank, dass Sie sich für die feedback4you GmbH entschieden haben. Wir haben eine Rechnung für die folgenden Leistungen vorbereit:

Leistung
Bestell-ID
Menge
Preis/Einhei
Netto
MwSt.
Brutto

';
$netTotal = '0';
$grossTotal = '0';
foreach ($invoices as $inv)
{
if(is_array($inv) && !is_null($inv))
{
$netTotal = ($inv['number_of_participants'] * $inv['perUnitPrice']);
$grossTotal = ($netTotal + $inv['vat_amount']);
if($inv['coupon_value'] > 0) {
$grossTotal = (($netTotal – $inv['coupon_value']) + $inv['vat_amount']);
}

$html .= '
'.$inv['project_name'].'
'.$inv['order_id'].'
'.$inv['number_of_participants'].'
'.euroFormat($inv['perUnitPrice'], true).'
'.euroFormat($netTotal, true).'
'.euroFormat($inv['vat_amount'], true).'
'.euroFormat($grossTotal, true).'
';
}
}
if($inv['coupon_value'] > 0) {
$html .= '

Gutschein angewendet
 
 
'.euroFormat($inv['coupon_value'], true).'
';
}
$html .= '

Gesamtbetrag
'.euroFormat($netTotal, true).'
'.euroFormat($inv['vat_amount'], true).'
'.euroFormat($grossTotal, true).'

Das Leistungsdatum entspricht dem Rechnungsdatum.
Die Zahlung wird über ein elektronisches Zahlungsmittelabgewickelt.

Credit Card

Falls Sie Fragen haben oder Unterstützung benötigen, steht Ihnen unser Kundenservice gerne zur Verfügung:
##Email##

Dies ist eine automatisch generierte Rechnung und ist ohne Unterschrift gültig.

';

}

$html .= '

';

$find = array("##Company_Name##","##Address1##","##Pincode##","##CityName##","##Phone##","##Email##","##Country##");
$replace = array($company_name,'Stefan-George-Ring 24','D-81929','Munchen',"+49 89 12 50 90 528","billing@feedback4you.com","Germany");
$html = str_replace($find, $replace, $html);
$mpdf = app('mpdf');
$mpdf->SetDisplayMode('fullpage');

//echo $html; die();

$header = '';
$footer = '

feedback4you GmbH
VAT: DE123451234

Birkenfeldstr. 8
85649 Brunnthal
Germany
billing@feedback4you.com

Sparkasse Freising Moosburg
IBAN: DE30 7005 1003 0026 1254 92
BIC: BYLADEM1FSI

';

//$mpdf->WriteHTML($stylesheet, 1);
$mpdf->SetHTMLHeader($header, '', true);
$mpdf->SetHTMLFooter($footer);

$mpdf->WriteHTML($html);

// Output the PDF (inline in the browser)
// Output PDF as a string

//$filename = date('Ymd').'_invoice_report.pdf';
$filename = $order_id.'_invoice.pdf';

if($savePdf == '1') {
//echo $html; die();

$storagePath = public_path('pdfs/invoices');
$fg=$mpdf->Output($storagePath . '/' . $filename, 'F');
// dd( $mpdf->Output($storagePath . '/' . $filename, 'F'));
// file_put_contents($storagePath . '/' . $filename, $pdfContent);
//if($fg)
// return $filename;

} else {
$pdfContent = $mpdf->Output('', 'S');
// Return PDF response
return Response::make($pdfContent, 200, [
'Content-Type' => 'application/pdf',
'Content-Disposition' => 'inline; filename="' . $filename . '"',
]);
}
}
this is the code'

1. **Code Structure and Readability**:
– Consider breaking down the long method into smaller, more manageable methods. For example, you could create separate methods for fetching payment details, generating HTML, and rendering the invoice.

2. **HTML Generation**:
– Instead of building the HTML string using concatenation, you might consider using a templating engine like Blade (if you're using Laravel) or simply separating HTML into a separate view file and rendering it. This will enhance readability and maintainability.

3. **Data Handling**:
– Ensure that you're checking if the `$paymentDetails` and `$projects` objects are null before trying to access their properties. This will prevent potential errors if the payment or project isn't found.

4. **Internationalization**:
– You have hardcoded language strings for German and English. Instead, consider using Laravel's localization features to manage different languages more efficiently.

5. **VAT Calculation**:
– If VAT is optional based on conditions, ensure that this logic is clearly defined. The `vat_comp` variable is currently initialized as an empty string; make sure it gets populated correctly based on your requirements.

6. **Security**:
– Always validate and sanitize user inputs, especially when dealing with IDs and payment data.

Here's a simplified version of how you could structure the invoice generation:

public function generateInvoice($paymentID, $savePdf = '')
{
    $paymentID = Crypt::decrypt($paymentID);
    $paymentDetails = Payments::findOrFail($paymentID);
    $project = Project::findOrFail($paymentDetails->project_id);
    $corporateDesign = getCorporatedesign($project->id);

    $clientData = $this->getClientData($corporateDesign);
    $invoiceData = $this->prepareInvoiceData($paymentDetails, $clientData, $project);

    $html = $this->generateInvoiceHtml($invoiceData);
    
    if ($savePdf) {
        // Save the PDF logic here
    }
    
    return $html;
}

private function getClientData($corporateDesign)
{
    // Logic to extract and format client data
}

private function prepareInvoiceData($paymentDetails, $clientData, $project)
{
    // Logic to prepare invoice data based on payment and client details
}

private function generateInvoiceHtml($invoiceData)
{
    // Use Blade or another templating approach to create the HTML
}

This way, the main function (`generateInvoice`) becomes clearer, and each part of the process is encapsulated in its own method. Adjust these suggestions based on your application's specific requirements and architecture.