What are the potential benefits of using concat/fpdi in conjunction with FPDF for PDF manipulation?

When working with PDF files in PHP, using concat/fpdi in conjunction with FPDF can provide additional functionality for manipulating existing PDF files. Concat/fpdi allows you to import pages from existing PDFs into your new PDF document created with FPDF, enabling you to combine, merge, or modify multiple PDF files. This can be useful for tasks such as adding headers, footers, watermarks, or other content to existing PDFs. 

require_once('fpdf/fpdf.php');
require_once('fpdi/autoload.php');

// Create new FPDF instance
$pdf = new FPDF();

// Create new FPDI instance
$pdfi = new FPDI();

// Add a page from an existing PDF file
$pdfi->setSourceFile('existing_file.pdf');
$template = $pdfi->importPage(1);
$pdf->AddPage();
$pdf->useTemplate($template, 0, 0);

// Add your content to the new PDF file
$pdf->SetFont('Arial','B',16);
$pdf->Cell(40,10,'Hello World!');

// Output the PDF file
$pdf->Output('new_file.pdf', 'F');

Keywords

concat fpdi FPDF PDF manipulation benefits

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