How does CSS play a role in defining fonts for specific text sections in TCPDF?

To define fonts for specific text sections in TCPDF using CSS, you can use the SetFont method in TCPDF along with CSS styles. First, define your CSS styles for different text sections using the SetFont method, and then apply these styles to the specific text sections using TCPDF's writeHTML method.

// Define CSS styles for different text sections
$styles = '<style>
            .header {
                font-family: helvetica;
                font-size: 16px;
                font-weight: bold;
            }
            .body {
                font-family: times;
                font-size: 12px;
            }
            </style>';

// Apply CSS styles to specific text sections
$pdf->SetFont('helvetica', 'B', 16);
$pdf->writeHTML($styles . '<div class="header">Header text</div>');

$pdf->SetFont('times', '', 12);
$pdf->writeHTML($styles . '<div class="body">Body text</div>');