How to create a traffic situation constructor?

Question

PHP

You need to make a constructor. Like an accident happened, and according to eyewitnesses, accident schemes are being built (cars, signs, traffic lights, traffic lanes, possibly pedestrians are placed), it is desirable that the schemes should be 3D, but this is not important for now, at the moment simple schemes need to go.
What can do this?
Maybe there are some similar things?
I would appreciate any help)

Answer 1

regexr.com

Answer 2

For example like this www.regexr.com/3c074
Or
/<a\s+(.*?)<\/a>/

Answer 3

jQuery UI Drag'n'Drop
Make a canvas, drag "objects" onto it, save the location of the objects. The main thing is to make "pictures" of cars and the rest.

Answer 4

Also interested. How exactly to save the position of objects on the canvas?