https://www.phpclasses.org/package/7685-PHP-Adjust-font-size-to-fit-a-text-in-a-limited-area.html
Image Fit Text Class: Adjust font size to fit a text in a limited area - PHP Classes
This class can adjust font size to fit a text in a limited area. It can take a given text string and the width and height of an area and tries to fit the text...