There is no functionality provide WooCommerce to retrieve last category page viewed. But, I solved.

First create a custom action, check if page is category page, and set Cat ID to session data if so. Then on your button, use this to get proper URL.

add_action( 'init', 'wp_check_product_cat_sess');
function wp_check_product_cat_sess(){
    if(!session_id()){
        session_start();
    }
}
add_action( 'wp', 'check_product_cats');
function check_product_cats(){
    global $wp_query;
    if( is_product_category() ){
        $_SESSION['set_last_cat_id'] = $wp_query->get_queried_object()->term_id;
    }
    if( is_product() ){
        $get_cats = get_the_terms( $wp_query->get_queried_object(), 'product_cat' ) ;
        if( count( $get_cats ) > 0 ){
            foreach($get_cats as $one_cat ){
                    $_SESSION['set_last_cat_id'] = $one_cat->term_id;
            }
        }
    }  
    if( is_cart()){
        //var_dump( $_SESSION['set_last_cat_id'] );
    }
}
add_filter( 'woocommerce_continue_shopping_redirect', 'woo_add_continue_shop_btn_to_cart', 20 );
function woo_add_continue_shop_btn_to_cart($return_to){
    if( isset( $_SESSION['set_last_cat_id'] ) ){
        $redirect_page_url = get_term_link( $_SESSION['set_last_cat_id'], 'product_cat' );
    }else{
        $redirect_page_url = get_permalink( wc_get_page_id( 'shop' ) );
    }
    return $redirect_page_url;
}

-------------------------------------------------
Let me know your thoughts and questions in the comments.
Email: vyasankit2008@gmail.com

 <?php
//Add Response code to video embeds in WordPress
function full_width_embed_html( $html ){
  return '<div class="video-container">' . $html . '</div>';
}
add_filter( 'embed_oembed_html', 'full_width_embed_html', 10, 3 );
add_filter( 'video_embed_html', 'full_width_embed_html' );
?>
<style>
.video-container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  max-width: 1200px;
  margin: 0 auto;
}
 
.video-container iframe, .video-container object, .video-container embed, .video-container video {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 100%;
}
</style>


-------------------------------------------------
Let me know your thoughts and questions in the comments.
Email: vyasankit2008@gmail.com

/*Single category ajax filter dropdown example, Please Subscribe Our Blog And Comment*/
<div class="vh-filter">
  <label class="label-cate">Filter By Category</label>
  <select class="game-select-category" data-taxonomy="game-category">          
    <option class="btn fil-cat" data-rel="all">All</option>
    <?php $terms = get_terms('video_category');
        foreach($terms as $term){
        $term_name = $term->name;
        $term_slug = $term->slug;
        ?>
        <option class="btn fil-cat" data-rel="<?php echo $term_slug; ?>" value="<?php echo $term_slug; ?>"><?php echo $term_name; ?></option>
    <?php } ?>
  </select>    
</div>

<ul id="vh-lobby-posts" class="vh-row-sm">                    
<?php
$args_video = array( 'post_type' => 'PostTypeName', 'posts_per_page' => -1 );
$loop_video = new WP_Query($args_video);

if ($loop_video->have_posts()) : while ($loop_video->have_posts()) : $loop_video->the_post(); ?>              
    <?php            
        $featured_img_url = get_the_post_thumbnail_url($post->ID, 'full');
        $categorys = get_the_terms( $post->ID, 'video_category' );    
        $concats = '';
        foreach ( $categorys as $cats){
           $concats .= $cats->slug.' ';
        }   
    ?>   
    <li id="img<?php echo get_the_ID(); ?>" class="vh-item scale-anm all <?php echo $concats; ?>">
        <a href="<?php the_permalink(); ?>" class="vh-thumb-link">
            <div class="vh-overlay"><img src="<?php echo $featured_img_url; ?>" alt="<?php the_title(); ?>" title="<?php the_title(); ?>" onerror="imgError(this);" onload="vhLobbyImage.imageLoaded(<?php echo get_the_ID(); ?>)">
                <span class="play-now">Play Now</span>
            </div>
        </a>
        <div class="vh-game-title"><?php the_title(); ?></div>
    </li>
<?php endwhile; ?><?php endif; ?>
</ul>

<script>
jQuery(document).ready(function(){
    jQuery(function() {       
        var selectedClass = "";               
        jQuery('.game-select-category').change(function(){
           var selectedClass = jQuery('.game-select-category option:selected').attr('data-rel');                     
           if(selectedClass == 'all'){
               jQuery("#vh-lobby-posts li.vh-item").not("."+selectedClass).fadeOut().addClass('scale-anm');          
               setTimeout(function(){
                    jQuery("."+selectedClass).fadeIn().removeClass('scale-anm');
                    jQuery("#vh-lobby-posts").fadeTo(300, 1);
                }, 300);
           }else{          
               jQuery("#vh-lobby-posts li.vh-item").not("."+selectedClass).fadeOut().removeClass('scale-anm');          
               setTimeout(function(){
                    jQuery("."+selectedClass).fadeIn().addClass('scale-anm');
                    jQuery("#vh-lobby-posts").fadeTo(300, 1);
                }, 300);           
           }          
        });               
    });
});
</script>

-------------------------------------------------
Let me know your thoughts and questions in the comments.
Email: vyasankit2008@gmail.com

-------------------------------------------------
Let me know your thoughts and questions in the comments.
Email: vyasankit2008@gmail.com

<?php
//add custom fields to WooCommerce products Single Page, Cart Page, Checkout Page, Order Detaile And Save To Database Table Name "wp_woocommerce_order_itemmeta"

add_action( 'woocommerce_before_add_to_cart_button', 'add_fields_before_add_to_cart' );
function add_fields_before_add_to_cart(){ ?>
    <table>
        <tr>
            <td>
                <?php _e( "Name:", "aoim"); ?>
            </td>
            <td>
                <input type = "text" name = "customer_name" id = "customer_name" placeholder = "Name on Gift Card">
            </td>
        </tr>
        <tr>
            <td>
                <?php _e( "Gift Price:", "aoim"); ?>
            </td>
            <td>
                <input type = "text" name = "custom_price" id = "custom_price" placeholder = "Your GiftPrice on Gift Card">
            </td>
        </tr>
    </table>
    <?php
}

/**
 * Add data to cart item
 */
add_filter( 'woocommerce_add_cart_item_data', 'add_cart_item_data', 25, 2 );
function add_cart_item_data( $cart_item_meta, $product_id ) {
    if ( isset( $_POST ['customer_name'] ) && isset( $_POST ['custom_price'] ) ) {
      
        $product = wc_get_product($product_id);      
        $price = $product->get_regular_price();
      
        $custom_data  = array() ;
        $custom_data [ 'customer_name' ]    = isset( $_POST ['customer_name'] ) ?  sanitize_text_field ( $_POST ['customer_name'] ) : "" ;
        $custom_data [ 'custom_price' ] = isset( $_POST ['custom_price'] ) ? sanitize_text_field ( $_POST ['custom_price'] ): "" ;
      
        $custom_data['totalPrice'] = $price + $custom_data [ 'custom_price' ];              
      
        $cart_item_meta ['custom_data']     = $custom_data ;
    }  
    return $cart_item_meta;
}

/**
 * Display custom data on cart and checkout page.
 */
add_filter( 'woocommerce_get_item_data', 'get_item_data' , 25, 2 );
function get_item_data ( $other_data, $cart_item ) {
    if ( isset( $cart_item [ 'custom_data' ] ) ) {
        $custom_data  = $cart_item [ 'custom_data' ];          
        $other_data[] = array( 'name' => 'Name', 'display'  => $custom_data['customer_name'] );
        $other_data[] = array( 'name' => 'GiftPrice', 'display'  => $custom_data['custom_price'] );
    }
    return $other_data;
}

// Set the new calculated price replacing cart item price
add_action( 'woocommerce_before_calculate_totals', 'set_cart_item_calculated_price', 20, 1 );
function set_cart_item_calculated_price( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) return;
  
    // Loop through cart items
    foreach ( $cart->get_cart() as $key=>$value ){                      
        if( ! isset( $value['custom_data']['totalPrice'] ) ){ continue; }
      
        if( $value['custom_data']['totalPrice'] > 0 ){
            $value['data']->set_price((float)$value['custom_data']['totalPrice']);
        }
    }
}

/**
 * Add order item meta.
*/
add_action( 'woocommerce_add_order_item_meta', 'add_order_item_meta' , 10, 2);
function add_order_item_meta ( $item_id, $values ) {
    if ( isset( $values [ 'custom_data' ] ) ) {
        $custom_data  = $values [ 'custom_data' ];
        wc_add_order_item_meta( $item_id, 'Name', $custom_data['customer_name'] );
        wc_add_order_item_meta( $item_id, 'GiftPrice', $custom_data['custom_price'] );
    }
}

<?php
$image_url        = $_POST['imageUrl'];
$image_name       = basename($image_url);
$upload_dir       = wp_upload_dir();
$image_data       = file_get_contents($image_url);
$genrate_unique_file_name = wp_unique_filename( $upload_dir['path'], $image_name );
$filename         = basename( $genrate_unique_file_name );
if( wp_mkdir_p( $upload_dir['path'] ) ) {
    $file = $upload_dir['path'] . '/' . $filename;
} else {
    $file = $upload_dir['basedir'] . '/' . $filename;
}
file_put_contents( $file, $image_data );
$wp_filetype = wp_check_filetype( $filename, null );

$attachment = array(
    'post_mime_type' => $wp_filetype['type'],
    'post_title'     => sanitize_file_name( $filename ),
    'post_content'   => '',
    'post_status'    => 'inherit'
);

$attach_id = wp_insert_attachment( $attachment, $file, $post_id );
require_once(ABSPATH . 'wp-admin/includes/image.php');
$attach_data = wp_generate_attachment_metadata( $attach_id, $file );
wp_update_attachment_metadata( $attach_id, $attach_data );
set_post_thumbnail( $post_id, $attach_id );
?>
-------------------------------------------------
Let me know your thoughts and questions in the comments.
Email: vyasankit2008@gmail.com

//Multiple Select Drop Down Code
<div class="multiselect" id="multiple">
    <?php
    global $wpdb;
    $getid= $_GET['id'];
    $sql11 = "SELECT * FROM TABLENAME WHERE id = '$getid'";
    $result11 = $wpdb->get_results($sql11);
    $count1 = 1;
    foreach($result11 as $row11){?>                             
        <label>
            <input type="checkbox" id="chknote_<?php echo $count1; ?>" name="client_check[]" class="queAns trigger" data-trigger="hidden_fields_<?php echo $count1; ?>" data-trigger-one="hidden_fields_one<?php echo $count1; ?>"  value="<?php echo $count1; ?>" />
            <?php echo $count1; ?>. <?php echo $client->lastname;?>'s <?php echo $row11->goal; ?>
        </label>
    <?php $count1++;}?>
</div>

//multiple select drop down js script
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script>
jQuery(function() {
jQuery(".multiselect").multiselect();
});
jQuery.fn.multiselect = function() {
$(this).each(function() {
var checkboxes = $(this).find("input:checkbox");
checkboxes.each(function(){
var checkbox = $(this);
if (checkbox.prop("checked"))
checkbox.addClass("multiselect-on");
checkbox.click(function() {
if (checkbox.prop("checked")){
checkbox.addClass("multiselect-on");
}else{
checkbox.removeClass("multiselect-on");
}
});
});
});
};
</script>

//open selected option script
<script>
jQuery(function() {
  jQuery('.hidden').hide();
  jQuery('.trigger').change(function() {
var hiddenId = jQuery(this).attr("data-trigger");
if (jQuery(this).is(':checked')) {
  jQuery("#" + hiddenId).show();
} else {
  jQuery("#" + hiddenId).hide();
}

var hiddenId = jQuery(this).attr("data-trigger-one");
if (jQuery(this).is(':checked')) {
  jQuery("#" + hiddenId).show();
} else {
  jQuery("#" + hiddenId).hide();
}

  });
</script>

//open selected option html/php code
<?php
global $wpdb;
$getid = $_GET['getid'];
$sql="SELECT * FROM TableName WHERE id = '$getid'";
$result=$wpdb->get_results($sql);
$count = 1;
foreach($result as $row){?>
<span id="hidden_fields_<?php echo $count; ?>"  style="display: none;">

<?php echo $count; ?>. <?php echo $client->columnName;?>'s <?php echo $row->columnName; ?>:
<p><input type="hidden" name="goal_id[]" value="<?php echo $row->columnName; ?>" /></p>         
<div class="col-md-12"> Notes:
<textarea name="note[]"  class="custom-txt-area" id="hidden_<?php echo $count; ?>"></textarea>
</div>

</span>             
<?php  $count++;} ?>

//css for dropdown
<style>
.queAns{
    margin-right:5px !important;
}
.multiselect {
    width:33em;
    height:10em;
    border:solid 1px #c0c0c0;
    overflow:auto;
    padding:5px;
}

.multiselect label {
    display:block;
}

.multiselect-on {
    color:#ffffff;
    background-color:#d29714;
}
</style>
-------------------------------------------------
Let me know your thoughts and questions in the comments.
Email: vyasankit2008@gmail.com

<div class="navbar-header">

  <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">

    <span class="sr-only">Toggle navigation</span>

    <span class="icon-bar"></span>

    <span class="icon-bar"></span>

    <span class="icon-bar"></span>

  </button>              

</div>

<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">

  <?php             

    $main_menu = array(

        'theme_location'  => 'primary',

        'menu'            => 'Main Menu',  // menu name

        'container'       => 'div',

        'container_class' => ' ',

        'container_id'    => '',

        'menu_class'      => 'menu',

        'menu_id'         => '',

        'echo'            => true,

        'fallback_cb'     => 'wp_page_menu',

        'before'          => '',

        'after'           => '',

        'link_before'     => '',

        'link_after'      => '',

        'items_wrap'      => '<ul class="nav navbar-nav">%3$s</ul>',

        'depth'           => 0,

        'walker'          => new WP_Bootstrap_Navwalker()

    );

    wp_nav_menu( $main_menu );

    ?>                                 

</div>


//walker menu function

<?php

if ( ! class_exists( 'WP_Bootstrap_Navwalker' ) ) {

    class WP_Bootstrap_Navwalker extends Walker_Nav_Menu {

        public function start_lvl( &$output, $depth = 0, $args = array() ) {

            $indent = str_repeat( "\t", $depth );

            $output .= "\n$indent<ul class=\" dropdown-menu\" >\n";

        }

        public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {

            $indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

            if ( 0 === strcasecmp( $item->attr_title, 'divider' ) && 1 === $depth ) {

                $output .= $indent . '<li class="divider">';

            } elseif ( 0 === strcasecmp( $item->title, 'divider' ) && 1 === $depth ) {

                $output .= $indent . '<li class="divider">';

            } elseif ( 0 === strcasecmp( $item->attr_title, 'dropdown-header' ) && 1 === $depth ) {

                $output .= $indent . '<li class="dropdown-header">' . esc_attr( $item->title );

            } elseif ( 0 === strcasecmp( $item->attr_title, 'disabled' ) ) {

                $output .= $indent . '<li class="disabled"><a href="#">' . esc_attr( $item->title ) . '</a>';

            } else {


                $classes = empty( $item->classes ) ? array() : (array) $item->classes;

                $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args ) );

                if ( $args->has_children ) {

                    $class_names .= ' dropdown';

                }

                if ( in_array( 'current-menu-item', $classes, true ) ) {

                    $class_names .= ' active';

                }

                $class_names = 'class="' . esc_attr( $class_names ) . '"';

                $output .= $indent . '<li ' . $class_names . '>';

                $atts = array();


                if ( empty( $item->attr_title ) ) {

                    $atts['title']  = ! empty( $item->title )   ? strip_tags( $item->title ) : '';

                } else {

                    $atts['title'] = $item->attr_title;

                }

                $atts['target'] = ! empty( $item->target ) ? $item->target : '';

                $atts['rel']    = ! empty( $item->xfn )    ? $item->xfn    : '';

                if ( $args->has_children && 0 === $depth ) {

                    $atts['href']           = '#';

                    $atts['data-toggle']    = 'dropdown';

                    $atts['class']          = 'dropdown-toggle';

                    $atts['aria-haspopup']  = 'true';

                    $atts['role']  = 'button';

                } else {

                    $atts['href'] = ! empty( $item->url ) ? $item->url : '';

                }

                $atts = apply_filters( 'nav_menu_link_attributes', $atts, $item, $args );

                $attributes = '';

                foreach ( $atts as $attr => $value ) {

                    if ( ! empty( $value ) ) {


                        $value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );

                        $attributes .= ' ' . $attr . '="' . $value . '"';

                    }

                }

                $item_output = $args->before;

         

                if ( ! empty( $item->attr_title ) ) {

                    $pos = strpos( esc_attr( $item->attr_title ), 'glyphicon' );

                    if ( false !== $pos ) {

                        $item_output .= '<a' . $attributes . '><span class="glyphicon ' . esc_attr( $item->attr_title ) . '" aria-hidden="true"></span>&nbsp;';

                    } else {

                        $item_output .= '<a' . $attributes . '><i class="fa ' . esc_attr( $item->attr_title ) . '" aria-hidden="true"></i>&nbsp;';

                    }

                } else {

                    $item_output .= '<a' . $attributes . '>';

                }

                $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;

                $item_output .= ( $args->has_children && 0 === $depth ) ? ' <span class="caret"></span></a>' : '</a>';

                $item_output .= $args->after;

                $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );

            }

        }     

        public function display_element( $element, &$children_elements, $max_depth, $depth, $args, &$output ) {

            if ( ! $element ) {

                return; }

            $id_field = $this->db_fields['id'];

            if ( is_object( $args[0] ) ) {

                $args[0]->has_children = ! empty( $children_elements[ $element->$id_field ] ); }

                parent::display_element( $element, $children_elements, $max_depth, $depth, $args, $output );

        }


        public static function fallback( $args ) {

            if ( current_user_can( 'edit_theme_options' ) ) {

                $container = $args['container'];

                $container_id = $args['container_id'];

                $container_class = $args['container_class'];

                $menu_class = $args['menu_class'];

                $menu_id = $args['menu_id'];


                if ( $container ) {

                    echo '<' . esc_attr( $container );

                    if ( $container_id ) {

                        echo ' id="' . esc_attr( $container_id ) . '"';

                    }

                    if ( $container_class ) {

                        echo ' class="' . sanitize_html_class( $container_class ) . '"'; }

                    echo '>';

                }

                echo '<ul';

                if ( $menu_id ) {

                    echo ' id="' . esc_attr( $menu_id ) . '"'; }

                if ( $menu_class ) {

                    echo ' class="' . esc_attr( $menu_class ) . '"'; }

                echo '>';

                echo '<li><a href="' . esc_url( admin_url( 'nav-menus.php' ) ) . '" title="">' . esc_attr( 'Add a menu', '' ) . '</a></li>';

                echo '</ul>';

                if ( $container ) {

                    echo '</' . esc_attr( $container ) . '>'; }

            }

        }

    }

}

?>

-------------------------------------------------

Let me know your thoughts and questions in the comments.
Email: vyasankit2008@gmail.com

Easy Slider Example with OwlCarousel Like :: Testimonial,Slider, ect. ::
Download the Js and Css Also from the OwlCarousel Website - with require jquery js file.

<link rel="stylesheet" href="../owlcarousel/owl.carousel.css">
<link rel="stylesheet" href="../owlcarousel/owl.theme.default.css">
<script src="../owlcarousel/owl.carousel.js"></script>
<div class="owl-carousel owl-theme">
  <div class="item">Lorem Ipsum is simply dummy text of the printing and typesetting industry.</div>
  <div class="item">Lorem Ipsum is simply dummy text of the printing and typesetting industry.</div>
  <div class="item">Lorem Ipsum is simply dummy text of the printing and typesetting industry.</div>
  <div class="item">Lorem Ipsum is simply dummy text of the printing and typesetting industry.</div>
  <div class="item">Lorem Ipsum is simply dummy text of the printing and typesetting industry.</div>
  <div class="item">Lorem Ipsum is simply dummy text of the printing and typesetting industry.</div>
  <div class="item">Lorem Ipsum is simply dummy text of the printing and typesetting industry.</div>
  <div class="item">Lorem Ipsum is simply dummy text of the printing and typesetting industry.</div>
</div>
<script>

jQuery('.owl-carousel').owlCarousel({
    loop:true,
    margin:10,
    nav:true,
    dots: false,
    //navText: ["<i class='fa fa-chevron-left'></i>","<i class='fa fa-chevron-right'></i>"],
    responsive:{
        0:{
            items:1
        },
        600:{
            items:2
        },
        1000:{
            items:2
        }
    }
})
</script>

-------------------------------------------------
Let me know your thoughts and questions in the comments.
Email: vyasankit2008@gmail.com