Remove variable pricing check and hide errors when discount code is applied.

remove-vp-pricing-discounut-code.php

<?php

// Copy from below here...

/**
 * Remove variable pricing check and hide errors when discount code is applied.
 * Follow this guide to add this code snippet to your site - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 * Visit www.paidmembershipspro.com for more information.
 */

// Remove check.
function my_pmpro_remove_vp_check_discount_code( $continue ) {
	global $pmpro_level;

	if ( isset( $pmpro_level->code_id ) ) {
		remove_filter( 'pmpro_registration_checks', 'pmprovp_pmpro_registration_checks' );
	}

	return $continue;
}
add_filter( 'pmpro_registration_checks', 'my_pmpro_remove_vp_check_discount_code', 5, 1 );

// Hide errors on checkout page.
function my_pmpro_vp_checkout_boxes() {
	?>
	<style>
		.custom-pmprovp-price {
			background-color: #ffffff !important;
		}
		.custom-pmprovp-warning {
			display: none !important;
		}
	</style>
	<script>
	jQuery(document).ready(function() {			
		function hide_pmprovp_errors() {
			if ( typeof hide_pmprovp_errors.has_run == 'undefined' ) {
				// This is the first time that the function has run
				jQuery( "#price" ).addClass( 'custom-pmprovp-price' );
				jQuery( "#pmprovp-warning" ).addClass( 'custom-pmprovp-warning' );
				hide_pmprovp_errors.has_run = 1;
			}
		}

		jQuery('#other_discount_code').keyup(function() {
			hide_pmprovp_errors();
		});
		jQuery('#discount_code').keyup(function() {
			hide_pmprovp_errors();
		});
	});
	</script>
	<?php
}
add_action( 'pmpro_checkout_boxes', 'my_pmpro_vp_checkout_boxes' );