How does the use of FPDI library impact the ability to read PDF files in PHP scripts, and why is it necessary in certain scenarios?

The FPDI library allows PHP scripts to read and import existing PDF files into another PDF document. This is necessary in scenarios where you need to dynamically generate PDF files that incorporate content from existing PDF files. 

// Include the FPDI library
require_once('fpdf/fpdf.php');
require_once('fpdi/fpdi.php');

// Create a new instance of FPDI
$pdf = new FPDI();

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

// Set the source PDF file
$pageCount = $pdf->setSourceFile('existing_file.pdf');

// Import the first page of the source PDF
$tplIdx = $pdf->importPage(1);

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

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

Keywords

FPDI library PDF files PHP scripts impact necessary

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