لینک به محصولات قبلی و بعدی در صفحه تک محصول ووکامرس

<?php
/**
 * @snippet       Add next/prev buttons @ WooCommerce Single Product Page
 * @how-to        mrebr.ir
 * @author        Rahmat Ebr
 * @testedwith    WooCommerce 9.5.1
 */

add_action('woocommerce_before_single_product', 'mrebr_prev_next_product');

// and if you also want them at the bottom...
add_action('woocommerce_after_single_product', 'mrebr_prev_next_product');

function mrebr_prev_next_product()
{

    echo '<div class="prev_next_buttons">';

    // 'product_cat' will make sure to return next/prev from current category
    $previous = next_post_link('%link', '← PREVIOUS', TRUE, ' ', 'product_cat');
    $next = previous_post_link('%link', 'NEXT →', TRUE, ' ', 'product_cat');

    echo $previous;
    echo $next;

    echo '</div>';
}

.prev_next_buttons {
    margin-bottom: 20px;
}

.prev_next_buttons a[rel="prev"],
.prev_next_buttons a[rel="next"] {
    display: block;
    box-shadow: rgba(99, 99, 99, 0.2) 0px 2px 8px 0px;
    float: left;
    background: #5333ed;
    color: #fff;
    padding: 0.25rem 1rem;
    border-radius: 5px;
}

.prev_next_buttons a[rel="prev"] {
    float: right;
}

.prev_next_buttons a[rel="next"] {
    float: left;
}

.prev_next_buttons::after {
    content: '';
    display: block;
    clear: both;
}