What are some alternative libraries or methods for generating PDFs in PHP that can be used as a backup if TCPDF is not working properly?

If TCPDF is not working properly, one alternative library for generating PDFs in PHP is FPDF. FPDF is a free and open-source library that allows for the creation of PDF files using PHP. By switching to FPDF, you can continue generating PDFs without relying on TCPDF.

// Include the FPDF library
require('fpdf.php');

// Create a new FPDF instance
$pdf = new FPDF();
$pdf->AddPage();

// Set font and text
$pdf->SetFont('Arial','B',16);
$pdf->Cell(40,10,'Hello, World!');

// Output the PDF
$pdf->Output();