How to save the data (coordinates) of the bing map polygon in the sql database, if they change their data when zooming and moving?

Question

PHP

Hello, tell me how to save the coordinates of polygons (squares, circles, etc.) into the sql database, and then display them on the map when the page is loaded (or when the button is pressed).
This miracle will serve for drawing on the map: www.garzilla.net/vemaps/Bing-Maps-7-Modules-Shape
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point coordinates