Get permalink of function defined in functions.php

You do not need a url to run a function in functions.php. Just call/use the function.

thanks esmi ..
In which file I can call the function? because i just need that function on click of some link.
I am doing coding in php almost after a year..may be i am asking simple question.. but can u plz explain more..

In which file I can call the function

In any file. As long as the function is in functions.php, WP will look after everything else.

But which url i will use on link? like if my function is in functions.php, i want to call that function on click of button in one plugin . Do i need to use onclick javascript or some other way use it in “href” variable of tag.?

Is this javascript?

no, I can use javascript also.. but currently I am want to use php function only because i can write my custom code of php and can call database tables also.

What does this link do? You’re not exactly giving us a lot to work with.

sorry. .. I just need to call some php function when i click on some link in plugin file. I want to pass variables also through url for that function.
Php function will contain my own code to add data into custom db table.

I hope this clarifies.