Customisation of Tax Toggle for WooCommerce for compatibility with 99w Rentals Plugin

functions.php

<?php

/**
 * Customisation of Tax Toggle for WooCommerce for compatibility with 99w Rentals Plugin
 *
 * Based on Tax Toggle for WooCommerce 1.3.6
 *
 * Plugin: https://1.envato.market/taxtoggle
 *
 * @param string $price_display_override Rental price.
 * @param string $product_price Full price.
 * @param object $product Product.
 * @return string
 */
function ttp_99w_rental_tax_change( $price_display_override, $product_price, $product ) {

	// Remove popular currencies. If you use a different currency add the unicode to the array.
	$price_display_override = str_replace( array( '&#36;', '&#8364;', '&#163;' ), '', $price_display_override );
	// Remove rest of non-alpha numeric.
	$price_display_override = preg_replace( '/[^0-9.]/', '', $price_display_override );

	// setup custom text options.
	$wc_incl      = __( 'Incl.', 'wc-tax' );
	$wc_excl      = __( 'Excl.', 'wc-tax' );
	$wc_zero      = __( 'No Tax', 'wc-tax' );
	$wc_from      = __( 'From', 'wc-tax' );
	$wc_rent_from = __( 'Rent from ', 'wc-tax' );

	$wootax_text = get_option( 'wc_tax_text', 'VAT' );
	// set default tax word if option is not set.
	if ( '' === $wootax_text ) {
		$wootax_text = __( 'VAT', 'wc-tax' );
	}

	$product_tax_rates = WC_Tax::get_rates( $product->get_tax_class() );
	$tax_amount        = WC_Tax::calc_tax( $price_display_override, $product_tax_rates, false );
	$price_inc_tax     = $price_display_override + array_sum( $tax_amount );

	return '<span class="amount product-tax-on product-tax" style="display:none;">' . $wc_rent_from . wc_price( $price_inc_tax ) . ' ' . $wc_incl . ' ' . $wootax_text . '</span><span class="amount product-tax-off product-tax">' . $wc_rent_from . wc_price( $price_display_override ) . ' ' . $wc_excl . ' ' . $wootax_text . '</span>';
}
add_filter( 'wcrp_rental_products_rental_price_html', 'ttp_99w_rental_tax_change', 3, 999 );