I am trying to use the Gform post submission hook but before I begin I just need to know where to place the custom PHP code? (Function.php?)
I am trying to use the Gform post submission hook but before I begin I just need to know where to place the custom PHP code? (Function.php?)
yes, your theme's functions.php file.
http://www.gravityhelp.com/documentation/page/Where_Do_I_Put_This_Code%3F