mypmpro-membership-checkout-image.php

<?php
/**
 * This code recipe will create a shortcode that returns an image based on the level selected.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 *
 */
 
 function mypmpro_membership_checkout_image(){

	if( !empty( $_REQUEST['level'] ) ){

		$level = intval( $_REQUEST['level'] );

		if( $level == 1 ){
			$image_url = 'ADD FULL URL TO IMAGE HERE';
		} else if( $level == 2 ){
			$image_url = 'ADD DIFFERENT FULL URL TO IMAGE HERE HERE';
		} else {
			$image_url = 'ADD DEFAULT URL TO IMAGE HERE';
		}

		return "<div class='mypmpro_membership_checkout_image'><img src='$image_url' /></div>";

	}

}
add_shortcode( 'membership_checkout_image', 'mypmpro_membership_checkout_image' );