What are some common challenges when rotating text in PDF generation using PHP?

One common challenge when rotating text in PDF generation using PHP is ensuring the text is rotated correctly and positioned accurately on the page. To solve this, you can use the SetTextMatrix() method provided by the TCPDF library to rotate and position the text as needed. 

// Include the TCPDF library
require_once('tcpdf/tcpdf.php');

// Create new TCPDF object
$pdf = new TCPDF();

// Add a new page
$pdf->AddPage();

// Set font
$pdf->SetFont('helvetica', '', 12);

// Set rotation angle
$angle = 45;

// Set text color
$pdf->SetTextColor(0, 0, 0);

// Set text position and rotation
$pdf->StartTransform();
$pdf->SetTextMatrix(cos(deg2rad($angle)), sin(deg2rad($angle)), -sin(deg2rad($angle)), cos(deg2rad($angle)), 50, 50);
$pdf->Cell(0, 0, 'Rotated Text', 0, 1, 'L');
$pdf->StopTransform();

// Output PDF
$pdf->Output('example.pdf', 'I');

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