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add_action("gform_post_submission", "set_post_content", 10, 2);

function set_post_content($entry, $form){
  //Gravity Forms has validated the data
  //Our Custom Form Submitted via PHP will go here
  // Lets get the IDs of the relevant fields and prepare an email message
  $message = print_r($entry, true);
  // In case any of our lines are larger than 70 characters, we should use wordwrap()
  $message = wordwrap($message, 70);
  // Send
  mail('travis@0to5.com', 'Getting the Gravity Form Field IDs', $message);
}