What are some common challenges faced when displaying date labels in graphs generated by PHPlot, and how can these be addressed in PHP code?

One common challenge when displaying date labels in graphs generated by PHPlot is that the dates may overlap or be unreadable due to the limited space available. To address this, you can rotate the date labels to make them more readable.

// Rotate date labels on the x-axis to prevent overlap
$plot->SetXLabelAngle(45);