AffiliateWP - Custom tracking script without using the shortcode. Useful for when you need to pass in dynamic values

functions.php

<?php

/**
 * Ninja Forms integration
 * 
 * 1. Set your ninja form to redirect to a "thanks page"
 * 2. Enter the Field ID for the amount below if using a "total" field. Otherwise you can safely ignore it.
 */
function affwp_integration_ninja_forms() {
	global $ninja_forms_processing;

	// change these values if required
	$total_field_id = 8;        // the Field ID that contains the total
	$status         = 'unpaid'; // the status that the referral should be created as

	// Make sure the conversion script is only injected into the success page
	if ( ! isset( $ninja_forms_processing ) ) {
		return;
	}

	// if no amount is specified the referral will be created as $0.00
	$amount = isset( $ninja_forms_processing->data['fields'][$total_field_id] ) ? $ninja_forms_processing->data['fields'][$total_field_id] : '';

	// referral arguments
	$args = array(
		'amount'      => $amount,
		'status'      => $status,
		'reference'   => $ninja_forms_processing->data['form']['sub_id'],
		'description' => $ninja_forms_processing->data['form']['form_title'],
		'context'     => 'ninja-forms' // used to link the reference number on the Affiliates -> Referrals page through to the edit submission page in Ninja Forms
	);

	// add the conversion script to the page
	affiliate_wp()->tracking->conversion_script( $args );
}
add_action( 'wp_head', 'affwp_integration_ninja_forms' );


/**
 * Optional - link the reference numbers on the Affiliates -> Referrals page to the Ninja Forms edit submission page
 */
function affwp_integration_ninja_forms_admin_ref_link( $reference = 0, $referral ) {
	if ( ! function_exists( 'Ninja_Forms' ) ) {
		return;
	}

	if ( empty( $referral->context ) || 'ninja-forms' != $referral->context ) {
		return $reference;
	}

	$url = add_query_arg( 'ref', urlencode( add_query_arg( array() ) ), get_edit_post_link( $reference ) );

	return '<a href="' . esc_url( $url ) . '">' . Ninja_Forms()->sub( $reference )->get_seq_num() . '</a>';
}
add_filter( 'affwp_referral_reference_column', 'affwp_integration_ninja_forms_admin_ref_link', 10, 2 );