Code-Snippets-Functions/Execute a function on a child site/AffiliateWP/disable-zero-amount-affiliate-referral-emails

function affwp_check_for_zero_amount_referral_disable_email( $return, $referral ) {

	// Check to see if AffiliateWP is active.
	if ( ! function_exists( 'affiliate_wp' ) ) {
		return;
	}

	// Get the referral amount from the referral object passed in.
	$referral_amount = $referral->amount;

	// Check of the referral amount is zero, will be formatted to a string.
	if ( $referral_amount == '0.00' ) {
		// Disables the "New Referral Email" sent to the affiliate if the amount of the referral is zero.
		$return = false;
	}

	return $return;
}
add_filter( 'affwp_notify_on_new_referral', 'affwp_check_for_zero_amount_referral_disable_email', 10, 2 );