Woocommerce - Disable/allow payment gateways based on user role.

disable_gateways.php

<?php
// Filter to remove/add payment gateways at checkout
add_filter( 'woocommerce_available_payment_gateways', 'mt_disable_gateways' );
function mt_disable_gateways( $available_gateways ) {
	
	// Get current user
	$user = wp_get_current_user();
	
	// Array to handle roles you want to allow this for.
	$allowed_roles = array( 'administrator');
	
	// Array_intersect compares the values of arrays to see if any match.
	if( array_intersect( $user->roles, $allowed_roles ) ) {
		
		// return all active
		return $available_gateways;
		
	} else {
		
		// Remove the one we are testing from everyone else
		unset( $available_gateways['paypal_pro_payflow'] );
		// Return modified available gateways
		return $available_gateways;
		
	}
	
}