What are the best practices for ensuring that a PDF remains fillable after adding additional content using PHP?

When adding additional content to a PDF using PHP, it is important to ensure that the PDF remains fillable, especially if it contains form fields. One way to achieve this is by using a library like TCPDF or FPDI to manipulate the PDF file while preserving its fillable form fields. By correctly handling the PDF content and form fields, you can maintain the fillable functionality even after adding new content. 

// Example code using TCPDF to add content to a fillable PDF
require_once('tcpdf/tcpdf.php');

// Create new PDF instance
$pdf = new TCPDF();

// Set PDF file properties
$pdf->SetCreator('Your Name');
$pdf->SetAuthor('Your Name');
$pdf->SetTitle('Fillable PDF with Additional Content');

// Add a new page
$pdf->AddPage();

// Set font
$pdf->SetFont('helvetica', '', 12);

// Add content to the PDF
$pdf->Cell(0, 10, 'Your additional content here', 0, 1, 'L');

// Output the PDF with fillable form fields intact
$pdf->Output('output.pdf', 'I');

Keywords

PDF fillable PHP FPDF TCPDF

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