What are the two main tools for creating PDFs from PHP and what are their advantages and limitations?

Issue: When working with PHP, there are two main tools for creating PDFs - TCPDF and FPDF. Each has its own advantages and limitations, so it's important to choose the right tool based on your specific requirements. Code snippet:

// Using TCPDF to create a PDF
require_once('tcpdf/tcpdf.php');

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

$pdf->Output('example.pdf', 'D');
```

```php
// Using FPDF to create a PDF
require('fpdf/fpdf.php');

$pdf = new FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial', 'B', 16);
$pdf->Cell(40, 10, 'Hello FPDF!');

$pdf->Output('example.pdf', 'D');