For our customization want to get the count of number of products in a cart then use the following code.

global $woocommerce;
$count = $woocommerce->cart->cart_contents_count;
if ($count > 0) 
{
	echo $count;
}
else
{
 echo "No products in cart";
}

For our customization want to create a new widget in WordPress programmatically then place the following snippet in functions.php within your theme folder!.

add_action( 'widgets_init', 'create_new_widget' );
function create_new_widget() 
{
    register_sidebar( array(
        'name' => __( 'Custom Sidebar', 'theme-slug' ),
        'id' => 'custom_sidebar',
        'description' => __( 'Your widget description here', 'theme-slug' ),       
    ) );
}

After that you can call this sidebar by following code. Wherever you want add the following code in that particular place.

dynamic_sidebar( 'left-sidebar' );

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For our customization want to change woocmmerce order notes label in checkout page then place the following snippet in functions.php within your theme folder!.

add_filter( 'woocommerce_checkout_fields' , 'change_order_note_label_in_woocommerce_checkout_page' );
function change_order_note_label_in_woocommerce_checkout_page( $fields ) {
     $fields['order']['order_comments']['label']="Special Insructions";
     return $fields;
}

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For our customization want to change woocommerce Out of stock text to Sold Out then place the following snippet in functions.php within your theme folder!.

add_filter('woocommerce_get_availability', 'change_woocommerce_out_of_stock_text');
function change_woocommerce_out_of_stock_text($availability)
{
	$availability['availability'] = str_ireplace('Out of stock', 'Sold Out', $availability['availability']);
	return $availability;
}

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For our customization want to remove woocommerce order notes section from checkout page then place the following snippet in functions.php within your theme folder!.

add_filter( 'woocommerce_checkout_fields' , 'remove_woocommerce_order_notes_from_checkout_page' );
function remove_woocommerce_order_notes_from_checkout_page( $fields ) {
     unset($fields['order']['order_comments']);
     return $fields;
}

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Here is a quick snippet to get particular user meta data by $email_address in WordPress. The following code will print particular user meta data for particular user.

$user = get_user_by( 'email', $email_address );
$user_id=$user->ID;
$key = 'you_key_name';
$single = true;
$meta_value = get_user_meta( $user_id, $key, $single );
echo $meta_value;

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Here is a quick snippet to get particular user meta data by $user_id in WordPress. The following code will print particular user meta data for particular user.

$key = 'you_key_name';
$single = true;
$meta_value = get_user_meta( $user_id, $key, $single );
echo $meta_value;

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Here is a quick snippet to get all user meta data by email address in WordPress. The following code will print all user meta data for given email address in wordpress.

$user = get_user_by( 'email', $email_address );
$user_id=$user->ID;
$all_meta_for_user = get_user_meta( $user_id );
print_r( $all_meta_for_user );

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Here is a quick snippet to get all user meta data by user_id in WordPress. The following code will print all user meta data for particular user.

$all_meta_for_user = get_user_meta( $user_id );
print_r( $all_meta_for_user );

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Here is a quick snippet to check whether the user is exists or not by email_address in WordPress.

if( get_user_by( 'email', $email_address ) == false )
{
    // The user doesn't exist
}
else
{
    // The user exists
}

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