What editor did it draw?

Question

PHP

Hello!
I found beautiful schemes on Google and I want to draw the same ones.
How? :)
Here is an example of a scheme, please help me to identify which editor can draw like this:
https://sites.google.com/site/certificatetranspare...

Answer 1

$blog1 = explode(',', '1,2,3,4')

Answer 2

edraw editor