How to obtain the dot matrix width and height of a text in PHP

This article describes how to obtain the dot matrix width and height of a text display in PHP, and describes how to use the imagettfbbox function and php to operate ttf text. it has some reference value, for more information about how to obtain the dot matrix width and height in PHP, see the following example. Share it with you for your reference. The details are as follows:

Define ("F_SIZE", 8); define ("F_FONT", "arial. ttf "); function get_bbox ($ text) {return imagettfbbox (F_SIZE, 0, F_FONT, $ text);} function text_height ($ text) {$ box = get_bbox ($ text); $ height = $ box [3]-$ box [5]; return $ height;} function text_width ($ text) {$ box = get_bbox ($ text); $ width = $ box [4]-$ box [6]; return $ width ;}

I hope this article will help you with php programming.