What are some recommended libraries or tools for advanced PDF manipulation in PHP projects?

When working on PHP projects that require advanced PDF manipulation, it is recommended to use libraries or tools that provide comprehensive features and functionalities for working with PDF files. Some popular libraries for advanced PDF manipulation in PHP projects include TCPDF, FPDI, and FPDF. These libraries offer capabilities such as creating, editing, merging, splitting, and encrypting PDF files.

// Example using TCPDF library for advanced PDF manipulation
require_once('tcpdf/tcpdf.php');

$pdf = new TCPDF();
$pdf->AddPage();
$pdf->SetFont('Arial', 'B', 16);
$pdf->Cell(40, 10, 'Hello World!');
$pdf->Output('example.pdf', 'D');