What are some alternative functions or methods that can be used to accurately determine the dimensions of text in fpdf before rendering it?

When working with fpdf, it can be challenging to accurately determine the dimensions of text before rendering it, especially when dealing with dynamic content. One solution is to use the GetStringWidth() method provided by fpdf to calculate the width of the text before adding it to the PDF document. Another option is to use the imagettfbbox() function from the GD library to get the bounding box of the text and calculate its dimensions based on that.

// Using GetStringWidth() method from fpdf
$pdf = new FPDF();
$pdf->AddPage();
$text = "Hello World";
$font_size = 12;
$text_width = $pdf->GetStringWidth($text) * $font_size / 1000;
$pdf->SetFont('Arial', '', $font_size);
$pdf->Cell($text_width, 0, $text);

// Using imagettfbbox() function from GD library
$text = "Hello World";
$font_size = 12;
$font = 'arial.ttf';
$bbox = imagettfbbox($font_size, 0, $font, $text);
$text_width = $bbox[2] - $bbox[0];
$text_height = $bbox[1] - $bbox[7];