A quick plugin to add a quantity to WooCommerce's 'add to cart' button

WooCommerce XNum to cart

<?php
/**
 * Plugin Name: WooCommerce XNum to cart
 * Plugin URI: http://claudiosmweb.com/snippets/woocommerce-loop-de-produtos-com-quantidade/
 * Source: http://docs.woothemes.com/document/override-loop-template-and-show-quantities-next-to-add-to-cart-buttons/
 * Description: Add x-number of items feild to the 'add to cart' button in WooCommerce
 * Version: .10
 * Author: orionrush
 * Note: You will have to style the button css according to your theme's needes.
 */


if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly


	/**
	 * Add some styles to quantity
	 *
	 * Styles should be enqued for sure, but this is here as a proof of principle.
	 * Add these styles to your theme's css styles, adding salt to taste.
	 *
	 * @author      orion.rush
	 *
	 */
//add_action( 'wp_head', 'add_styles_to_quantity' ); 
function add_styles_to_quantity() {
        echo "<style media='screen'>.archive.woocommerce-page .quantity.buttons_added { float: left; margin-right: 4px!important; }</style>";
    }

	/**
	 * Custom Loop for Add to Cart - modified
	 * 
	 * Template with quantity.
	 *
	 * @author      WooThemes
	 * @package     WooCommerce/Templates
	 * @version     1.6.4
	 */

add_filter('woocommerce_loop_add_to_cart_link','xNum');

function xNum() {
		global $product;

	if ( ! $product->is_in_stock() ) : ?>
	    <a href="<?php echo apply_filters( 'out_of_stock_add_to_cart_url', get_permalink( $product->id ) ); ?>" class="button"><?php echo apply_filters( 'out_of_stock_add_to_cart_text', __( 'Read More', 'woocommerce' ) ); ?></a>
	<?php else : ?>	 
	    <?php
	        $link = array(
	            'url'   => '',
	            'label' => '',
	            'class' => ''
	        );
	        switch ( $product->product_type ) {
	            case "variable" :
	                $link['url']    = apply_filters( 'variable_add_to_cart_url', get_permalink( $product->id ) );
	                $link['label']  = apply_filters( 'variable_add_to_cart_text', __( 'Select options', 'woocommerce' ) );
	            break;
	            case "grouped" :
	                $link['url']    = apply_filters( 'grouped_add_to_cart_url', get_permalink( $product->id ) );
	                $link['label']  = apply_filters( 'grouped_add_to_cart_text', __( 'View options', 'woocommerce' ) );	          
	            break;
	            case "external" :
	                $link['url']    = apply_filters( 'external_add_to_cart_url', get_permalink( $product->id ) );
	                $link['label']  = apply_filters( 'external_add_to_cart_text', __( 'Read More', 'woocommerce' ) );
	            break;
	            default :
	                if ( $product->is_purchasable() ) {
	                    $link['url']    = apply_filters( 'add_to_cart_url', esc_url( $product->add_to_cart_url() ) );
	                    $link['label']  = apply_filters( 'add_to_cart_text', __( 'Add to cart', 'woocommerce' ) );
	                    $link['class']  = apply_filters( 'add_to_cart_class', 'add_to_cart_button' );
	                } else {
	                    $link['url']    = apply_filters( 'not_purchasable_url', get_permalink( $product->id ) );
	                    $link['label']  = apply_filters( 'not_purchasable_text', __( 'Read More', 'woocommerce' ) );
	                }
	            break;
	        }
	        // If there is a simple product.
	        if ( $product->product_type == 'simple' ) {
	            ?>
	            <form action="<?php echo esc_url( $product->add_to_cart_url() ); ?>" class="cart" method="post" enctype="multipart/form-data">
	                <?php
	                    // Displays the quantity box.
	                    woocommerce_quantity_input(); ?>

	                <button type="submit" class="button alt"><?php echo $link['label']; ?></button>
	            
	            </form>
	            <?php
	        
	        } else {

	          printf('<a href="%s" rel="nofollow" data-product_id="%s" class="button add_to_cart_button product_type_%s">%s</a>',  
	          	$link['url'], 
	          	$product->id, 
	          	$product->product_type, 
	          	$link['label']
	          	);
	        }
	    ?>
	<?php endif;
}

	/**
	 * Add to cart messages.
	 * Change output texts to include number of items. 
	 * 
	 *
	 * @author      orion.rush
	 * @package     WooCommerce/includes/wc-cart-functions.php
	 * @version     2.1.9
	 * 
	 * @access		public
	 * @param 		int|array $product_id
	 * @return 		void
	 */

add_filter( 'wc_add_to_cart_message', 'xNum_messages', 10, 2 );
function xNum_messages($message, $product_id) {

	if ( is_array( $product_id ) ) {

	    $titles = array();

	    foreach ( $product_id as $id ) {
	        $titles[] = get_the_title( $id );
	    }
	    echo print_r($titles);	
	    $added_text = sprintf( __( '&quot;%s&quot; to your cart.', 'woocommerce' ), join( __( '&quot; and &quot;', 'woocommerce' ), array_filter( array_merge( array( join( '&quot;, &quot;', array_slice( $titles, 0, -1 ) ) ), array_slice( $titles, -1 ) ) ) ) );

	} else {
	    $added_text = sprintf( __( '&quot;%s&quot; was successfully added to your cart.', 'woocommerce' ), get_the_title( $product_id ) );
	}

	// Output success messages
	if ( get_option( 'woocommerce_cart_redirect_after_add' ) == 'yes' ) :

	    $return_to  = apply_filters( 'woocommerce_continue_shopping_redirect', wp_get_referer() ? wp_get_referer() : home_url() );

	    $message    = sprintf(
	        '<a href="%s" class="alert-link">%s &rarr;</a> %s',
	        $return_to, __( 'Continue Shopping', 'woocommerce' ),
	        $added_text
	    );

	else :

	    $message    = sprintf(
	        '<a href="%s" class="alert-link">%s &rarr;</a> %s',
	        get_permalink( wc_get_page_id( 'cart' ) ),
	        __( 'View Cart', 'woocommerce' ),
	        $added_text );

	endif;

	return $message;
}