Custom Gravity form submission processing

plugin.php

<?php
/**
 * Plugin Name: My custom Gravity form submission processing plugin
 */

// We will use photo contest entry submissions as the example

when_a_gravity_form_is_submitted( 'check_whether_it_is_a_contest_entry_submission' );

when_a_contest_entry_is_submitted( 'do_some_custom_processing' );








// Details
function when_a_gravity_form_is_submitted( $do_this ) { 
	add_action( 'gform_after_submission', $do_this );
}

define( 'PHOTO_CONTEST_FORM_ID', '2' );

function check_whether_it_is_a_contest_entry_submission( $user_submission ) { 
	if ( $this_is_a_photo_contest_submission = PHOTO_CONTEST_FORM_ID === $user_submission[ 'form_id' ] ) {
		do_action( 'photo_contest_was_submitted', $user_submission );
	}
}

function when_a_contest_entry_is_submitted( $do_this ) {
	add_action( 'photo_contest_was_submitted', $do_this );
}

function do_some_custom_processing( $user_submission ) {
	// ...
}