What is the recommended approach for adding text to an existing PDF using fpdf?

When adding text to an existing PDF using fpdf in PHP, the recommended approach is to first open the existing PDF file, then create a new instance of fpdf, import the pages from the existing PDF, add the desired text using the fpdf methods, and finally output the modified PDF. This ensures that the original content is preserved while adding the new text. 

<?php
require('fpdf.php');

// Open existing PDF file
$pdf = new FPDF();
$pdf->AddPage();
$pdf->setSourceFile('existing.pdf');
$tplIdx = $pdf->importPage(1);

// Use imported page as template
$pdf->useTemplate($tplIdx, 10, 10, 100);

// Add text to the PDF
$pdf->SetFont('Arial', 'B', 16);
$pdf->SetTextColor(255, 0, 0);
$pdf->SetXY(50, 50);
$pdf->Cell(0, 10, 'New text added using fpdf');

// Output the modified PDF
$pdf->Output('output.pdf', 'F');
?>

Keywords

FPDF PHP PDF text adding

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