What are some best practices for handling PDF files in PHP, especially when it comes to displaying them on a webpage?

When handling PDF files in PHP, it is important to ensure proper handling and displaying on a webpage to provide a seamless user experience. One common approach is to use a library like TCPDF or FPDF to generate PDF files, and then use a combination of PHP and HTML to display them on a webpage. It is also important to consider security measures such as validating user input and preventing unauthorized access to PDF files.

// Example code using TCPDF library to generate and display a PDF file on a webpage

require_once('tcpdf/tcpdf.php');

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

// Set document information
$pdf->SetCreator('Your Name');
$pdf->SetAuthor('Your Name');
$pdf->SetTitle('Sample PDF');
$pdf->SetSubject('Sample PDF Document');
$pdf->SetKeywords('TCPDF, PDF, example, test, guide');

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

// Set some content to display in the PDF
$pdf->writeHTML('<h1>Hello, World!</h1>');

// Output the PDF as a file
$pdf->Output('sample.pdf', 'I');