What are the potential challenges faced when trying to draw a line under content with varying lengths in a PDF document using FPDF in PHP?

When trying to draw a line under content with varying lengths in a PDF document using FPDF in PHP, a potential challenge is determining the correct position for the line to ensure it appears consistently under the content. One solution is to calculate the length of the content and position the line accordingly. Another approach is to use the SetY() method to move the current position before drawing the line.

// Calculate the length of the content
$contentLength = $pdf->GetStringWidth($content);

// Set the position for the line
$pdf->SetY($pdf->GetY() + 5);

// Draw the line under the content
$pdf->Line($pdf->GetX(), $pdf->GetY(), $pdf->GetX() + $contentLength, $pdf->GetY());