Are there any specific PHP libraries or tools recommended for working with PDF portfolios?

When working with PDF portfolios in PHP, one recommended library is TCPDF. TCPDF is a PHP library for generating PDF files and supports features like PDF portfolios. By using TCPDF, you can easily create, modify, and extract content from PDF portfolios in your PHP application.

// Include the TCPDF library
require_once('tcpdf/tcpdf.php');

// Create a new TCPDF object
$pdf = new TCPDF();

// Set PDF portfolio properties
$pdf->setPDFPortfolio(true);

// Add files to the portfolio
$pdf->addPortfolioFile('file1.pdf', 'File 1');
$pdf->addPortfolioFile('file2.pdf', 'File 2');

// Output the PDF portfolio
$pdf->Output('portfolio.pdf', 'I');