Add Custom Tab to WooCommerce Product Page

/**
 * Add custom tab to WooCommerce product page
 * Simple and easy to customize
 * Prefix: tpsc_ (TP Snippet Collection)
 */

add_filter('woocommerce_product_tabs', 'tpsc_add_custom_product_tab');

function tpsc_add_custom_product_tab($tabs) {
    global $product;
    
    // Get custom content from product meta field
    $custom_content = get_post_meta($product->get_id(), '_custom_tab_content', true);
    
    // Only add tab if content exists
    if (!empty($custom_content)) {
        $tabs['custom_info'] = array(
            'title'    => __('Custom Tab', 'woocommerce'), // TAB TITLE
            'priority' => 50, // TAB SORTING (DESC 10, ADD INFO 20, REVIEWS 30)
            'callback' => 'tpsc_custom_tab_content', // TAB CONTENT CALLBACK
        );
    }
    
    return $tabs;
}

function tpsc_custom_tab_content() {
    global $product;
    
    // Get custom content from product meta field
    $custom_content = get_post_meta($product->get_id(), '_custom_tab_content', true);
    
    echo '<div class="custom-tab-content">';
    echo wpautop($custom_content);
    echo '</div>';
}

// Add meta box to product edit page
add_action('add_meta_boxes', 'tpsc_add_custom_tab_meta_box');

function tpsc_add_custom_tab_meta_box() {
    add_meta_box(
        'custom_tab_content',
        'Custom Tab Content',
        'tpsc_custom_tab_meta_box_content',
        'product'
    );
}

function tpsc_custom_tab_meta_box_content($post) {
    $value = get_post_meta($post->ID, '_custom_tab_content', true);
    echo '<textarea name="custom_tab_content" rows="5" style="width:100%;">' . esc_textarea($value) . '</textarea>';
    echo '<p>This content will appear in the "Custom Tab" on the product page.</p>';
}

// Save meta box data
add_action('save_post', 'tpsc_save_custom_tab_content');

function tpsc_save_custom_tab_content($post_id) {
    if (isset($_POST['custom_tab_content'])) {
        update_post_meta($post_id, '_custom_tab_content', sanitize_textarea_field($_POST['custom_tab_content']));
    }
}