Display the discounted percentage near sale price in Single product pages for WC 3.0+

Question

I had this code in function.php of my theme to display the percentage after price and it was working fine in WooCommerce v2.6.14.

But this snippet doesn't work anymore on WooCommerce version 3.0+.

How can I fix that?

Here is that code:

// Add save percent next to sale item prices.
add_filter( 'woocommerce_sale_price_html', 'woocommerce_custom_sales_price', 10, 2 );
function woocommerce_custom_sales_price( $price, $product ) {
    $percentage = round( ( ( $product->regular_price - $product->sale_price ) / $product->regular_price ) * 100 );
    return $price . sprintf( __(' Save %s', 'woocommerce' ), $percentage . '%' );
}

Killy

Answer 1

Updated - 2019 (avoid rounding price issue) - 2017 (avoid NAN% percentage value)

woocommerce_sale_price_html hook has been replaced by a different hook in WooCommerce 3.0+, that has now 3 arguments (but not the $product argument anymore).

add_filter( 'woocommerce_format_sale_price', 'woocommerce_custom_sales_price', 10, 3 );
function woocommerce_custom_sales_price( $price, $regular_price, $sale_price ) {
    // Getting the clean numeric prices (without html and currency)
    $_reg_price = floatval( strip_tags($regular_price) );
    $_sale_price = floatval( strip_tags($sale_price) );

    // Percentage calculation and text
    $percentage = round( ( $_reg_price - $_sale_price ) / $_reg_price * 100 ).'%';
    $percentage_txt = ' ' . __(' Save ', 'woocommerce' ) . $percentage;

    $formatted_regular_price = is_numeric( $regular_price ) ? wc_price( $regular_price ) : $regular_price;
    $formatted_sale_price    = is_numeric( $sale_price )    ? wc_price( $sale_price )    : $sale_price;

    echo '<del>' . $formatted_regular_price . '</del> <ins>' . $formatted_sale_price . $percentage_txt . '</ins>';
}

This code goes in function.php file of your active child theme (or theme) or also in any plugin file.
The code is tested and works. For WooCommerce version 3.0+ (thanks to @Mikebcn and @AsifRao)

For rounding the percentage you can use round(), number_format() or number_format_i18n():

$percentage = number_format_i18n( ( $_reg_price - $_sale_price ) / $_reg_price * 100, 0 ).'%';

$percentage = number_format( ( $_reg_price - $_sale_price ) / $_reg_price * 100, 0 ).'%';

---

Original answer code: Here is that functional similar code:

// Only for WooCommerce version 3.0+
add_filter( 'woocommerce_format_sale_price', 'woocommerce_custom_sales_price', 10, 3 );
function woocommerce_custom_sales_price( $price, $regular_price, $sale_price ) {
    $percentage = round( ( $regular_price - $sale_price ) / $regular_price * 100 ).'%';
    $percentage_txt = ' ' . __(' Save ', 'woocommerce' ) . $percentage;
    $price = '<del>' . ( is_numeric( $regular_price ) ? wc_price( $regular_price ) : $regular_price ) . '</del> <ins>' . ( is_numeric( $sale_price ) ? wc_price( $sale_price ) . $percentage_txt : $sale_price . $percentage_txt ) . '</ins>';
    return $price;
}

This code goes in function.php file of your active child theme (or theme) or also in any plugin file.
The code is tested and works. For WooCommerce version 3.0+.

Magnetostriction

its returning NAN% – Expectation

@Magnetostriction in my case $regular_price returrning "<span class="woocommerce-Price-amount amount">65.99<span class="woocommerce-Price-currencySymbol">$</span></span>" not just the regular price but all this html and thats why it is returning nan – Expectation

@Magnetostriction realised it's WooCommerce's Measurement Price Calculator that alters the price. Having to edit the plugin's files manually and save it in a different name :( – Felipafelipe

@Magnetostriction theres no hook, just a function in the plugin that changes the price displayed. says in the plugin documentation that there are major conflicts with anything changing the price also – Felipafelipe

This does not work with variation product apparently. – Lingcod