There is a small glitch in the click+jump logic i think.

example:

When i press CTRL+ mouse button on the var1 on the first echo line it jumps to the function definition line, but after the comma
Also with the var2 on the second line, it jumps after the )
What is the logic in that? it makes more sence to have it jump right after the var itself and not 1 position after that.

the logic is simple. Php parser does not know that the variable in the argument list is defined until it reaches "," or ")"