$pdf->SetFont('dejavusans', 'B', 14); $pdf->Cell(0, 10, 'Hello world!', 0, 1);
$pdf->SetFont('helvetica', '', 12); $pdf->Write(5, 'This is some text.');This code sets the font to Helvetica with a size of 12 and outputs the text "This is some text." in the PDF document. Both examples use TCPDF's SetFont() method to specify the font for text output, with different font families, styles, and sizes. In conclusion, SetFont() is a method of the TCPDF package library designed for setting font styles and families for text output in PDF documents generated with PHP.