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EDITING: class-wc-form-handler.php

<?php

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

/**
 * Handle frontend forms.
 *
 * @class 		WC_Form_Handler
 * @version		2.2.0
 * @package		WooCommerce/Classes/
 * @category	Class
 * @author 		WooThemes
 */
class WC_Form_Handler {

/**
	 * Hook in methods.
	 */
	public static function init() {
		add_action( 'template_redirect', array( __CLASS__, 'redirect_reset_password_link' ) );
		add_action( 'template_redirect', array( __CLASS__, 'save_address' ) );
		add_action( 'template_redirect', array( __CLASS__, 'save_account_details' ) );
		add_action( 'wp_loaded', array( __CLASS__, 'checkout_action' ), 20 );
		add_action( 'wp_loaded', array( __CLASS__, 'process_login' ), 20 );
		add_action( 'wp_loaded', array( __CLASS__, 'process_registration' ), 20 );
		add_action( 'wp_loaded', array( __CLASS__, 'process_lost_password' ), 20 );
		add_action( 'wp_loaded', array( __CLASS__, 'process_reset_password' ), 20 );
		add_action( 'wp_loaded', array( __CLASS__, 'cancel_order' ), 20 );
		add_action( 'wp_loaded', array( __CLASS__, 'order_again' ), 20 );
		add_action( 'wp_loaded', array( __CLASS__, 'update_cart_action' ), 20 );
		add_action( 'wp_loaded', array( __CLASS__, 'add_to_cart_action' ), 20 );

// May need $wp global to access query vars.
		add_action( 'wp', array( __CLASS__, 'pay_action' ), 20 );
		add_action( 'wp', array( __CLASS__, 'add_payment_method_action' ), 20 );
		add_action( 'wp', array( __CLASS__, 'delete_payment_method_action' ), 20 );
		add_action( 'wp', array( __CLASS__, 'set_default_payment_method_action' ), 20 );
	}

/**
	 * Remove key and login from querystring, set cookie, and redirect to account page to show the form.
	 */
	public static function redirect_reset_password_link() {
		if ( is_account_page() && ! empty( $_GET['key'] ) && ! empty( $_GET['login'] ) ) {
			$value = sprintf( '%s:%s', wp_unslash( $_GET['login'] ), wp_unslash( $_GET['key'] ) );
			WC_Shortcode_My_Account::set_reset_password_cookie( $value );

wp_safe_redirect( add_query_arg( 'show-reset-form', 'true', wc_lostpassword_url() ) );
			exit;
		}
	}

/**
	 * Save and and update a billing or shipping address if the
	 * form was submitted through the user account page.
	 */
	public static function save_address() {
		global $wp;

if ( 'POST' !== strtoupper( $_SERVER['REQUEST_METHOD'] ) ) {
			return;
		}

if ( empty( $_POST['action'] ) || 'edit_address' !== $_POST['action'] || empty( $_POST['_wpnonce'] ) || ! wp_verify_nonce( $_POST['_wpnonce'], 'woocommerce-edit_address' ) ) {
			return;
		}

$user_id = get_current_user_id();

if ( $user_id <= 0 ) {
			return;
		}

$load_address = isset( $wp->query_vars['edit-address'] ) ? wc_edit_address_i18n( sanitize_title( $wp->query_vars['edit-address'] ), true ) : 'billing';

$address = WC()->countries->get_address_fields( esc_attr( $_POST[ $load_address . '_country' ] ), $load_address . '_' );

foreach ( $address as $key => $field ) {

if ( ! isset( $field['type'] ) ) {
				$field['type'] = 'text';
			}

// Get Value.
			switch ( $field['type'] ) {
				case 'checkbox' :
					$_POST[ $key ] = isset( $_POST[ $key ] ) ? 1 : 0;
				break;
				default :
					$_POST[ $key ] = isset( $_POST[ $key ] ) ? wc_clean( $_POST[ $key ] ) : '';
				break;
			}

// Hook to allow modification of value.
			$_POST[ $key ] = apply_filters( 'woocommerce_process_myaccount_field_' . $key, $_POST[ $key ] );

// Validation: Required fields.
			if ( ! empty( $field['required'] ) && empty( $_POST[ $key ] ) ) {
				wc_add_notice( $field['label'] . ' ' . __( 'is a required field.', 'woocommerce' ), 'error' );
			}

if ( ! empty( $_POST[ $key ] ) ) {

// Validation rules
				if ( ! empty( $field['validate'] ) && is_array( $field['validate'] ) ) {
					foreach ( $field['validate'] as $rule ) {
						switch ( $rule ) {
							case 'postcode' :
								$_POST[ $key ] = strtoupper( str_replace( ' ', '', $_POST[ $key ] ) );

if ( ! WC_Validation::is_postcode( $_POST[ $key ], $_POST[ $load_address . '_country' ] ) ) {
									wc_add_notice( __( 'Please enter a valid postcode/ZIP.', 'woocommerce' ), 'error' );
								} else {
									$_POST[ $key ] = wc_format_postcode( $_POST[ $key ], $_POST[ $load_address . '_country' ] );
								}
							break;
							case 'phone' :
								$_POST[ $key ] = wc_format_phone_number( $_POST[ $key ] );

if ( ! WC_Validation::is_phone( $_POST[ $key ] ) ) {
									wc_add_notice( '' . $field['label'] . ' ' . __( 'is not a valid phone number.', 'woocommerce' ), 'error' );
								}
							break;
							case 'email' :
								$_POST[ $key ] = strtolower( $_POST[ $key ] );

if ( ! is_email( $_POST[ $key ] ) ) {
									wc_add_notice( '' . $field['label'] . ' ' . __( 'is not a valid email address.', 'woocommerce' ), 'error' );
								}
							break;
						}
					}
				}
			}
		}

if ( wc_notice_count( 'error' ) == 0 ) {

foreach ( $address as $key => $field ) {
				update_user_meta( $user_id, $key, $_POST[ $key ] );
			}

wc_add_notice( __( 'Address changed successfully.', 'woocommerce' ) );

do_action( 'woocommerce_customer_save_address', $user_id, $load_address );

wp_safe_redirect( wc_get_page_permalink( 'myaccount' ) );
			exit;
		}
	}

/**
	 * Save the password/account details and redirect back to the my account page.
	 */
	public static function save_account_details() {

if ( 'POST' !== strtoupper( $_SERVER[ 'REQUEST_METHOD' ] ) ) {
			return;
		}

if ( empty( $_POST[ 'action' ] ) || 'save_account_details' !== $_POST[ 'action' ] || empty( $_POST['_wpnonce'] ) || ! wp_verify_nonce( $_POST['_wpnonce'], 'save_account_details' ) ) {
			return;
		}

$errors       = new WP_Error();
		$user         = new stdClass();

$user->ID     = (int) get_current_user_id();
		$current_user = get_user_by( 'id', $user->ID );

if ( $user->ID <= 0 ) {
			return;
		}

$account_first_name = ! empty( $_POST[ 'account_first_name' ] ) ? wc_clean( $_POST[ 'account_first_name' ] ) : '';
		$account_last_name  = ! empty( $_POST[ 'account_last_name' ] ) ? wc_clean( $_POST[ 'account_last_name' ] ) : '';
		$account_email      = ! empty( $_POST[ 'account_email' ] ) ? sanitize_email( $_POST[ 'account_email' ] ) : '';
		$pass_cur           = ! empty( $_POST[ 'password_current' ] ) ? $_POST[ 'password_current' ] : '';
		$pass1              = ! empty( $_POST[ 'password_1' ] ) ? $_POST[ 'password_1' ] : '';
		$pass2              = ! empty( $_POST[ 'password_2' ] ) ? $_POST[ 'password_2' ] : '';
		$save_pass          = true;

$user->first_name   = $account_first_name;
		$user->last_name    = $account_last_name;

// Prevent emails being displayed, or leave alone.
		$user->display_name = is_email( $current_user->display_name ) ? $user->first_name : $current_user->display_name;

// Handle required fields
		$required_fields = apply_filters( 'woocommerce_save_account_details_required_fields', array(
			'account_first_name' => __( 'First Name', 'woocommerce' ),
			'account_last_name'  => __( 'Last Name', 'woocommerce' ),
			'account_email'      => __( 'Email address', 'woocommerce' ),
		) );

foreach ( $required_fields as $field_key => $field_name ) {
			$value = wc_clean( $_POST[ $field_key ] );
			if ( empty( $value ) ) {
				wc_add_notice( '' . esc_html( $field_name ) . ' ' . __( 'is a required field.', 'woocommerce' ), 'error' );
			}
		}

if ( $account_email ) {
			if ( ! is_email( $account_email ) ) {
				wc_add_notice( __( 'Please provide a valid email address.', 'woocommerce' ), 'error' );
			} elseif ( email_exists( $account_email ) && $account_email !== $current_user->user_email ) {
				wc_add_notice( __( 'This email address is already registered.', 'woocommerce' ), 'error' );
			}
			$user->user_email = $account_email;
		}

if ( ! empty( $pass_cur ) && empty( $pass1 ) && empty( $pass2 ) ) {
			wc_add_notice( __( 'Please fill out all password fields.', 'woocommerce' ), 'error' );
			$save_pass = false;
		} elseif ( ! empty( $pass1 ) && empty( $pass_cur ) ) {
			wc_add_notice( __( 'Please enter your current password.', 'woocommerce' ), 'error' );
			$save_pass = false;
		} elseif ( ! empty( $pass1 ) && empty( $pass2 ) ) {
			wc_add_notice( __( 'Please re-enter your password.', 'woocommerce' ), 'error' );
			$save_pass = false;
		} elseif ( ( ! empty( $pass1 ) || ! empty( $pass2 ) ) && $pass1 !== $pass2 ) {
			wc_add_notice( __( 'New passwords do not match.', 'woocommerce' ), 'error' );
			$save_pass = false;
		} elseif ( ! empty( $pass1 ) && ! wp_check_password( $pass_cur, $current_user->user_pass, $current_user->ID ) ) {
			wc_add_notice( __( 'Your current password is incorrect.', 'woocommerce' ), 'error' );
			$save_pass = false;
		}

if ( $pass1 && $save_pass ) {
			$user->user_pass = $pass1;
		}

// Allow plugins to return their own errors.
		do_action_ref_array( 'woocommerce_save_account_details_errors', array( &$errors, &$user ) );

if ( $errors->get_error_messages() ) {
			foreach ( $errors->get_error_messages() as $error ) {
				wc_add_notice( $error, 'error' );
			}
		}

if ( wc_notice_count( 'error' ) === 0 ) {

wp_update_user( $user ) ;

wc_add_notice( __( 'Account details changed successfully.', 'woocommerce' ) );

do_action( 'woocommerce_save_account_details', $user->ID );

wp_safe_redirect( wc_get_page_permalink( 'myaccount' ) );
			exit;
		}
	}

/**
	 * Process the checkout form.
	 */
	public static function checkout_action() {
		if ( isset( $_POST['woocommerce_checkout_place_order'] ) || isset( $_POST['woocommerce_checkout_update_totals'] ) ) {

if ( WC()->cart->is_empty() ) {
				wp_redirect( wc_get_page_permalink( 'cart' ) );
				exit;
			}

if ( ! defined( 'WOOCOMMERCE_CHECKOUT' ) ) {
				define( 'WOOCOMMERCE_CHECKOUT', true );
			}

WC()->checkout()->process_checkout();
		}
	}

/**
	 * Process the pay form.
	 */
	public static function pay_action() {
		global $wp;

if ( isset( $_POST['woocommerce_pay'] ) && isset( $_POST['_wpnonce'] ) && wp_verify_nonce( $_POST['_wpnonce'], 'woocommerce-pay' ) ) {

ob_start();

// Pay for existing order
			$order_key  = $_GET['key'];
			$order_id   = absint( $wp->query_vars['order-pay'] );
			$order      = wc_get_order( $order_id );

if ( $order->id == $order_id && $order->order_key == $order_key && $order->needs_payment() ) {

do_action( 'woocommerce_before_pay_action', $order );

// Set customer location to order location
				if ( $order->billing_country ) {
					WC()->customer->set_country( $order->billing_country );
				}
				if ( $order->billing_state ) {
					WC()->customer->set_state( $order->billing_state );
				}
				if ( $order->billing_postcode ) {
					WC()->customer->set_postcode( $order->billing_postcode );
				}
				if ( $order->billing_city ) {
					WC()->customer->set_city( $order->billing_city );
				}

// Terms
				if ( ! empty( $_POST['terms-field'] ) && empty( $_POST['terms'] ) ) {
					wc_add_notice( __( 'You must accept our Terms &amp; Conditions.', 'woocommerce' ), 'error' );
					return;
				}

// Update payment method
				if ( $order->needs_payment() ) {
					$payment_method     = isset( $_POST['payment_method'] ) ? wc_clean( $_POST['payment_method'] ) : false;
					$available_gateways = WC()->payment_gateways->get_available_payment_gateways();

if ( ! $payment_method ) {
						wc_add_notice( __( 'Invalid payment method.', 'woocommerce' ), 'error' );
						return;
					}

// Update meta
					update_post_meta( $order_id, '_payment_method', $payment_method );

if ( isset( $available_gateways[ $payment_method ] ) ) {
						$payment_method_title = $available_gateways[ $payment_method ]->get_title();
					} else {
						$payment_method_title = '';
					}

update_post_meta( $order_id, '_payment_method_title', $payment_method_title );

// Validate
					$available_gateways[ $payment_method ]->validate_fields();

// Process
					if ( wc_notice_count( 'error' ) == 0 ) {

$result = $available_gateways[ $payment_method ]->process_payment( $order_id );

// Redirect to success/confirmation/payment page
						if ( 'success' === $result['result'] ) {
							wp_redirect( $result['redirect'] );
							exit;
						}
					}

} else {
					// No payment was required for order
					$order->payment_complete();
					wp_safe_redirect( $order->get_checkout_order_received_url() );
					exit;
				}

do_action( 'woocommerce_after_pay_action', $order );

}

}
	}

/**
	 * Process the add payment method form.
	 */
	public static function add_payment_method_action() {
		if ( isset( $_POST['woocommerce_add_payment_method'], $_POST['payment_method'], $_POST['_wpnonce'] ) && wp_verify_nonce( $_POST['_wpnonce'], 'woocommerce-add-payment-method' ) ) {

ob_start();

$payment_method = wc_clean( $_POST['payment_method'] );

$available_gateways = WC()->payment_gateways->get_available_payment_gateways();
			// Validate
			$available_gateways[ $payment_method ]->validate_fields();

// Process
			if ( wc_notice_count( 'wc_errors' ) == 0 ) {
				$result = $available_gateways[ $payment_method ]->add_payment_method();
				// Redirect to success/confirmation/payment page
				if ( $result['result'] == 'success' ) {
					wc_add_notice( __( 'Payment method added.', 'woocommerce' ) );
					wp_redirect( $result['redirect'] );
					exit();
				}

}

/**
	 * Process the delete payment method form.
	 */
	public static function delete_payment_method_action() {
		global $wp;

if ( isset( $wp->query_vars['delete-payment-method'] ) ) {

$token_id = absint( $wp->query_vars['delete-payment-method'] );
			$token = WC_Payment_Tokens::get( $token_id );
			$delete = true;

if ( is_null( $token ) ) {
				wc_add_notice( __( 'Invalid payment method', 'woocommerce' ), 'error' );
				$delete = false;
			}

if ( get_current_user_id() !== $token->get_user_id() ) {
				wc_add_notice( __( 'Invalid payment method', 'woocommerce' ), 'error' );
				$delete = false;
			}

if ( false === wp_verify_nonce( $_REQUEST['_wpnonce'], 'delete-payment-method-' . $token_id ) ) {
				wc_add_notice( __( 'Invalid payment method', 'woocommerce' ), 'error' );
				$delete = false;
			}

if ( $delete ) {
				WC_Payment_Tokens::delete( $token_id );
				wc_add_notice( __( 'Payment method deleted.', 'woocommerce' ) );
			}

wp_redirect( wc_get_account_endpoint_url( 'payment-methods' ) );
			exit();
		}

}

/**
	 * Process the delete payment method form.
	 */
	public static function set_default_payment_method_action() {
		global $wp;

if ( isset( $wp->query_vars['set-default-payment-method'] ) ) {

$token_id = absint( $wp->query_vars['set-default-payment-method'] );
			$token = WC_Payment_Tokens::get( $token_id );
			$delete = true;

if ( is_null( $token ) ) {
				wc_add_notice( __( 'Invalid payment method', 'woocommerce' ), 'error' );
				$delete = false;
			}

if ( get_current_user_id() !== $token->get_user_id() ) {
				wc_add_notice( __( 'Invalid payment method', 'woocommerce' ), 'error' );
				$delete = false;
			}

if ( false === wp_verify_nonce( $_REQUEST['_wpnonce'], 'set-default-payment-method-' . $token_id ) ) {
				wc_add_notice( __( 'Invalid payment method', 'woocommerce' ), 'error' );
				$delete = false;
			}

if ( $delete ) {
				WC_Payment_Tokens::set_users_default( $token->get_user_id(), intval( $token_id ) );
				wc_add_notice( __( 'This payment method was successfully set as your default.', 'woocommerce' ) );
			}

wp_redirect( wc_get_account_endpoint_url( 'payment-methods' ) );
			exit();
		}

}

/**
	 * Remove from cart/update.
	 */
	public static function update_cart_action() {

// Add Discount
		if ( ! empty( $_POST['apply_coupon'] ) && ! empty( $_POST['coupon_code'] ) ) {
			WC()->cart->add_discount( sanitize_text_field( $_POST['coupon_code'] ) );
		}

// Remove Coupon Codes
		elseif ( isset( $_GET['remove_coupon'] ) ) {
			WC()->cart->remove_coupon( wc_clean( $_GET['remove_coupon'] ) );
		}

// Remove from cart
		elseif ( ! empty( $_GET['remove_item'] ) && isset( $_GET['_wpnonce'] ) && wp_verify_nonce( $_GET['_wpnonce'], 'woocommerce-cart' ) ) {
			$cart_item_key = sanitize_text_field( $_GET['remove_item'] );

if ( $cart_item = WC()->cart->get_cart_item( $cart_item_key ) ) {
				WC()->cart->remove_cart_item( $cart_item_key );

$product = wc_get_product( $cart_item['product_id'] );

$item_removed_title = apply_filters( 'woocommerce_cart_item_removed_title', $product ? $product->get_title() : __( 'Item', 'woocommerce' ), $cart_item );

// Don't show undo link if removed item is out of stock.
				if ( $product->is_in_stock() && $product->has_enough_stock( $cart_item['quantity'] ) ) {
					$removed_notice = sprintf( __( '%s removed.', 'woocommerce' ), $item_removed_title );
					$removed_notice .= ' <a href="' . esc_url( WC()->cart->get_undo_url( $cart_item_key ) ) . '">' . __( 'Undo?', 'woocommerce' ) . '</a>';
				} else {
					$removed_notice = sprintf( __( '%s removed.', 'woocommerce' ), $item_removed_title );
				}

wc_add_notice( $removed_notice );
			}

$referer  = wp_get_referer() ? remove_query_arg( array( 'remove_item', 'add-to-cart', 'added-to-cart' ), add_query_arg( 'removed_item', '1', wp_get_referer() ) ) : wc_get_cart_url();
			wp_safe_redirect( $referer );
			exit;
		}

// Undo Cart Item
		elseif ( ! empty( $_GET['undo_item'] ) && isset( $_GET['_wpnonce'] ) && wp_verify_nonce( $_GET['_wpnonce'], 'woocommerce-cart' ) ) {
			$cart_item_key = sanitize_text_field( $_GET['undo_item'] );

WC()->cart->restore_cart_item( $cart_item_key );

$referer  = wp_get_referer() ? remove_query_arg( array( 'undo_item', '_wpnonce' ), wp_get_referer() ) : wc_get_cart_url();
			wp_safe_redirect( $referer );
			exit;
		}

// Update Cart - checks apply_coupon too because they are in the same form
		if ( ( ! empty( $_POST['apply_coupon'] ) || ! empty( $_POST['update_cart'] ) || ! empty( $_POST['proceed'] ) ) && isset( $_POST['_wpnonce'] ) && wp_verify_nonce( $_POST['_wpnonce'], 'woocommerce-cart' ) ) {

$cart_updated = false;
			$cart_totals  = isset( $_POST['cart'] ) ? $_POST['cart'] : '';

if ( ! WC()->cart->is_empty() && is_array( $cart_totals ) ) {
				foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {

$_product = $values['data'];

// Skip product if no updated quantity was posted
					if ( ! isset( $cart_totals[ $cart_item_key ] ) || ! isset( $cart_totals[ $cart_item_key ]['qty'] ) ) {
						continue;
					}

// Sanitize
					$quantity = apply_filters( 'woocommerce_stock_amount_cart_item', wc_stock_amount( preg_replace( "/[^0-9\.]/", '', $cart_totals[ $cart_item_key ]['qty'] ) ), $cart_item_key );

if ( '' === $quantity || $quantity == $values['quantity'] )
						continue;

// Update cart validation
					$passed_validation 	= apply_filters( 'woocommerce_update_cart_validation', true, $cart_item_key, $values, $quantity );

// is_sold_individually
					if ( $_product->is_sold_individually() && $quantity > 1 ) {
						wc_add_notice( sprintf( __( 'You can only have 1 %s in your cart.', 'woocommerce' ), $_product->get_title() ), 'error' );
						$passed_validation = false;
					}

if ( $passed_validation ) {
						WC()->cart->set_quantity( $cart_item_key, $quantity, false );
						$cart_updated = true;
					}

}
			}

// Trigger action - let 3rd parties update the cart if they need to and update the $cart_updated variable
			$cart_updated = apply_filters( 'woocommerce_update_cart_action_cart_updated', $cart_updated );

if ( $cart_updated ) {
				// Recalc our totals
				WC()->cart->calculate_totals();
			}

if ( ! empty( $_POST['proceed'] ) ) {
				wp_safe_redirect( wc_get_checkout_url() );
				exit;
			} elseif ( $cart_updated ) {
				wc_add_notice( __( 'Cart updated.', 'woocommerce' ) );
				$referer = remove_query_arg( 'remove_coupon', ( wp_get_referer() ? wp_get_referer() : wc_get_cart_url() ) );
				wp_safe_redirect( $referer );
				exit;
			}
		}
	}

/**
	 * Place a previous order again.
	 */
	public static function order_again() {

// Nothing to do
		if ( ! isset( $_GET['order_again'] ) || ! is_user_logged_in() || ! isset( $_GET['_wpnonce'] ) || ! wp_verify_nonce( $_GET['_wpnonce'], 'woocommerce-order_again' ) ) {
			return;
		}

// Clear current cart
		WC()->cart->empty_cart();

// Load the previous order - Stop if the order does not exist
		$order = wc_get_order( absint( $_GET['order_again'] ) );

if ( empty( $order->id ) ) {
			return;
		}

if ( ! $order->has_status( 'completed' ) ) {
			return;
		}

// Make sure the user is allowed to order again. By default it check if the
		// previous order belonged to the current user.
		if ( ! current_user_can( 'order_again', $order->id ) ) {
			return;
		}

// Copy products from the order to the cart
		foreach ( $order->get_items() as $item ) {
			// Load all product info including variation data
			$product_id   = (int) apply_filters( 'woocommerce_add_to_cart_product_id', $item['product_id'] );
			$quantity     = (int) $item['qty'];
			$variation_id = (int) $item['variation_id'];
			$variations   = array();
			$cart_item_data = apply_filters( 'woocommerce_order_again_cart_item_data', array(), $item, $order );

foreach ( $item['item_meta'] as $meta_name => $meta_value ) {
				if ( taxonomy_is_product_attribute( $meta_name ) ) {
					$variations[ $meta_name ] = $meta_value[0];
				} elseif ( meta_is_product_attribute( $meta_name, $meta_value[0], $product_id ) ) {
					$variations[ $meta_name ] = $meta_value[0];
				}
			}

// Add to cart validation
			if ( ! apply_filters( 'woocommerce_add_to_cart_validation', true, $product_id, $quantity, $variation_id, $variations, $cart_item_data ) ) {
				continue;
			}

WC()->cart->add_to_cart( $product_id, $quantity, $variation_id, $variations, $cart_item_data );
		}

do_action( 'woocommerce_ordered_again', $order->id );

// Redirect to cart
		wc_add_notice( __( 'The cart has been filled with the items from your previous order.', 'woocommerce' ) );
		wp_safe_redirect( wc_get_cart_url() );
		exit;
	}

/**
	 * Cancel a pending order.
	 */
	public static function cancel_order() {
		if ( isset( $_GET['cancel_order'] ) && isset( $_GET['order'] ) && isset( $_GET['order_id'] ) ) {

$order_key        = $_GET['order'];
			$order_id         = absint( $_GET['order_id'] );
			$order            = wc_get_order( $order_id );
			$user_can_cancel  = current_user_can( 'cancel_order', $order_id );
			$order_can_cancel = $order->has_status( apply_filters( 'woocommerce_valid_order_statuses_for_cancel', array( 'pending', 'failed' ) ) );
			$redirect         = $_GET['redirect'];

if ( $order->has_status( 'cancelled' ) ) {
				// Already cancelled - take no action
			} elseif ( $user_can_cancel && $order_can_cancel && $order->id === $order_id && $order->order_key === $order_key ) {

// Cancel the order + restore stock
				$order->cancel_order( __('Order cancelled by customer.', 'woocommerce' ) );

// Message
				wc_add_notice( apply_filters( 'woocommerce_order_cancelled_notice', __( 'Your order was cancelled.', 'woocommerce' ) ), apply_filters( 'woocommerce_order_cancelled_notice_type', 'notice' ) );

do_action( 'woocommerce_cancelled_order', $order->id );

} elseif ( $user_can_cancel && ! $order_can_cancel ) {
				wc_add_notice( __( 'Your order can no longer be cancelled. Please contact us if you need assistance.', 'woocommerce' ), 'error' );
			} else {
				wc_add_notice( __( 'Invalid order.', 'woocommerce' ), 'error' );
			}

if ( $redirect ) {
				wp_safe_redirect( $redirect );
				exit;
			}
		}
	}

/**
	 * Add to cart action.
	 *
	 * Checks for a valid request, does validation (via hooks) and then redirects if valid.
	 *
	 * @param bool $url (default: false)
	 */
	public static function add_to_cart_action( $url = false ) {
		if ( empty( $_REQUEST['add-to-cart'] ) || ! is_numeric( $_REQUEST['add-to-cart'] ) ) {
			return;
		}

$product_id          = apply_filters( 'woocommerce_add_to_cart_product_id', absint( $_REQUEST['add-to-cart'] ) );
		$was_added_to_cart   = false;
		$adding_to_cart      = wc_get_product( $product_id );

if ( ! $adding_to_cart ) {
			return;
		}

$add_to_cart_handler = apply_filters( 'woocommerce_add_to_cart_handler', $adding_to_cart->product_type, $adding_to_cart );

// Variable product handling
		if ( 'variable' === $add_to_cart_handler ) {
			$was_added_to_cart = self::add_to_cart_handler_variable( $product_id );

// Grouped Products
		} elseif ( 'grouped' === $add_to_cart_handler ) {
			$was_added_to_cart = self::add_to_cart_handler_grouped( $product_id );

// Custom Handler
		} elseif ( has_action( 'woocommerce_add_to_cart_handler_' . $add_to_cart_handler ) ){
			do_action( 'woocommerce_add_to_cart_handler_' . $add_to_cart_handler, $url );

// Simple Products
		} else {
			$was_added_to_cart = self::add_to_cart_handler_simple( $product_id );
		}

// If we added the product to the cart we can now optionally do a redirect.
		if ( $was_added_to_cart && wc_notice_count( 'error' ) === 0 ) {
			// If has custom URL redirect there
			if ( $url = apply_filters( 'woocommerce_add_to_cart_redirect', $url ) ) {
				wp_safe_redirect( $url );
				exit;
			} elseif ( get_option( 'woocommerce_cart_redirect_after_add' ) === 'yes' ) {
				wp_safe_redirect( wc_get_cart_url() );
				exit;
			}
		}
	}

/**
	 * Handle adding simple products to the cart.
	 * @since 2.4.6 Split from add_to_cart_action
	 * @param int $product_id
	 * @return bool success or not
	 */
	private static function add_to_cart_handler_simple( $product_id ) {
		$quantity 			= empty( $_REQUEST['quantity'] ) ? 1 : wc_stock_amount( $_REQUEST['quantity'] );
		$passed_validation 	= apply_filters( 'woocommerce_add_to_cart_validation', true, $product_id, $quantity );

if ( $passed_validation && WC()->cart->add_to_cart( $product_id, $quantity ) !== false ) {
			wc_add_to_cart_message( array( $product_id => $quantity ), true );
			return true;
		}
		return false;
	}

/**
	 * Handle adding grouped products to the cart.
	 * @since 2.4.6 Split from add_to_cart_action
	 * @param int $product_id
	 * @return bool success or not
	 */
	private static function add_to_cart_handler_grouped( $product_id ) {
		$was_added_to_cart = false;
		$added_to_cart     = array();

if ( ! empty( $_REQUEST['quantity'] ) && is_array( $_REQUEST['quantity'] ) ) {
			$quantity_set = false;

foreach ( $_REQUEST['quantity'] as $item => $quantity ) {
				if ( $quantity <= 0 ) {
					continue;
				}
				$quantity_set = true;

// Add to cart validation
				$passed_validation 	= apply_filters( 'woocommerce_add_to_cart_validation', true, $item, $quantity );

if ( $passed_validation && WC()->cart->add_to_cart( $item, $quantity ) !== false ) {
					$was_added_to_cart = true;
					$added_to_cart[ $item ] = $quantity;
				}
			}

if ( ! $was_added_to_cart && ! $quantity_set ) {
				wc_add_notice( __( 'Please choose the quantity of items you wish to add to your cart&hellip;', 'woocommerce' ), 'error' );
			} elseif ( $was_added_to_cart ) {
				wc_add_to_cart_message( $added_to_cart );
				return true;
			}

} elseif ( $product_id ) {
			/* Link on product archives */
			wc_add_notice( __( 'Please choose a product to add to your cart&hellip;', 'woocommerce' ), 'error' );
		}
		return false;
	}

/**
	 * Handle adding variable products to the cart.
	 * @since 2.4.6 Split from add_to_cart_action
	 * @param int $product_id
	 * @return bool success or not
	 */
	private static function add_to_cart_handler_variable( $product_id ) {
		$adding_to_cart     = wc_get_product( $product_id );
		$variation_id       = empty( $_REQUEST['variation_id'] ) ? '' : absint( $_REQUEST['variation_id'] );
		$quantity           = empty( $_REQUEST['quantity'] ) ? 1 : wc_stock_amount( $_REQUEST['quantity'] );
		$missing_attributes = array();
		$variations         = array();
		$attributes         = $adding_to_cart->get_attributes();

// If no variation ID is set, attempt to get a variation ID from posted attributes.
		if ( empty( $variation_id ) ) {
			$variation_id = $adding_to_cart->get_matching_variation( wp_unslash( $_POST ) );
		}

$variation = wc_get_product( $variation_id );

// Verify all attributes
		foreach ( $attributes as $attribute ) {
			if ( ! $attribute['is_variation'] ) {
				continue;
			}

$taxonomy = 'attribute_' . sanitize_title( $attribute['name'] );

if ( isset( $_REQUEST[ $taxonomy ] ) ) {

// Get value from post data
				if ( $attribute['is_taxonomy'] ) {
					// Don't use wc_clean as it destroys sanitized characters
					$value = sanitize_title( stripslashes( $_REQUEST[ $taxonomy ] ) );
				} else {
					$value = wc_clean( stripslashes( $_REQUEST[ $taxonomy ] ) );
				}

// Get valid value from variation
				$valid_value = isset( $variation->variation_data[ $taxonomy ] ) ? $variation->variation_data[ $taxonomy ] : '';

// Allow if valid
				if ( '' === $valid_value || $valid_value === $value ) {
					$variations[ $taxonomy ] = $value;
					continue;
				}

} else {
				$missing_attributes[] = wc_attribute_label( $attribute['name'] );
			}
		}

if ( ! empty( $missing_attributes ) ) {
			wc_add_notice( sprintf( _n( '%s is a required field', '%s are required fields', sizeof( $missing_attributes ), 'woocommerce' ), wc_format_list_of_items( $missing_attributes ) ), 'error' );
		} elseif ( empty( $variation_id ) ) {
			wc_add_notice( __( 'Please choose product options&hellip;', 'woocommerce' ), 'error' );
		} else {
			// Add to cart validation
			$passed_validation 	= apply_filters( 'woocommerce_add_to_cart_validation', true, $product_id, $quantity, $variation_id, $variations );

if ( $passed_validation && WC()->cart->add_to_cart( $product_id, $quantity, $variation_id, $variations ) !== false ) {
				wc_add_to_cart_message( array( $product_id => $quantity ), true );
				return true;
			}
		}
		return false;
	}

/**
	 * Process the login form.
	 */
	public static function process_login() {
		$nonce_value = isset( $_POST['_wpnonce'] ) ? $_POST['_wpnonce'] : '';
		$nonce_value = isset( $_POST['woocommerce-login-nonce'] ) ? $_POST['woocommerce-login-nonce'] : $nonce_value;

if ( ! empty( $_POST['login'] ) && wp_verify_nonce( $nonce_value, 'woocommerce-login' ) ) {

try {
				$creds    = array();
				$username = trim( $_POST['username'] );

$validation_error = new WP_Error();
				$validation_error = apply_filters( 'woocommerce_process_login_errors', $validation_error, $_POST['username'], $_POST['password'] );

if ( $validation_error->get_error_code() ) {
					throw new Exception( '' . __( 'Error', 'woocommerce' ) . ': ' . $validation_error->get_error_message() );
				}

if ( empty( $username ) ) {
					throw new Exception( '' . __( 'Error', 'woocommerce' ) . ': ' . __( 'Username is required.', 'woocommerce' ) );
				}

if ( empty( $_POST['password'] ) ) {
					throw new Exception( '' . __( 'Error', 'woocommerce' ) . ': ' . __( 'Password is required.', 'woocommerce' ) );
				}

if ( is_email( $username ) && apply_filters( 'woocommerce_get_username_from_email', true ) ) {
					$user = get_user_by( 'email', $username );

if ( isset( $user->user_login ) ) {
						$creds['user_login'] = $user->user_login;
					} else {
						throw new Exception( '' . __( 'Error', 'woocommerce' ) . ': ' . __( 'A user could not be found with this email address.', 'woocommerce' ) );
					}

} else {
					$creds['user_login'] = $username;
				}

$creds['user_password'] = $_POST['password'];
				$creds['remember']      = isset( $_POST['rememberme'] );
				$secure_cookie          = is_ssl() ? true : false;
				$user                   = wp_signon( apply_filters( 'woocommerce_login_credentials', $creds ), $secure_cookie );

if ( is_wp_error( $user ) ) {
					$message = $user->get_error_message();
					$message = str_replace( '' . esc_html( $creds['user_login'] ) . '', '' . esc_html( $username ) . '', $message );
					throw new Exception( $message );
				} else {

if ( ! empty( $_POST['redirect'] ) ) {
						$redirect = $_POST['redirect'];
					} elseif ( wp_get_referer() ) {
						$redirect = wp_get_referer();
					} else {
						$redirect = wc_get_page_permalink( 'myaccount' );
					}

wp_redirect( apply_filters( 'woocommerce_login_redirect', $redirect, $user ) );
					exit;
				}

} catch ( Exception $e ) {
				wc_add_notice( apply_filters('login_errors', $e->getMessage() ), 'error' );
			}
		}
	}

/**
	 * Handle lost password form.
	 */
	public static function process_lost_password() {
		if ( isset( $_POST['wc_reset_password'] ) && isset( $_POST['user_login'] ) && isset( $_POST['_wpnonce'] ) && wp_verify_nonce( $_POST['_wpnonce'], 'lost_password' ) ) {
			$success = WC_Shortcode_My_Account::retrieve_password();

// If successful, redirect to my account with query arg set
			if ( $success ) {
				wp_redirect( add_query_arg( 'reset-link-sent', 'true', remove_query_arg( array( 'key', 'login', 'reset' ) ) ) );
				exit;
			}
		}
	}

/**
	 * Handle reset password form.
	 */
	public static function process_reset_password() {
		$posted_fields = array( 'wc_reset_password', 'password_1', 'password_2', 'reset_key', 'reset_login', '_wpnonce' );

foreach ( $posted_fields as $field ) {
			if ( ! isset( $_POST[ $field ] ) ) {
				return;
			}
			$posted_fields[ $field ] = $_POST[ $field ];
		}

if ( ! wp_verify_nonce( $posted_fields['_wpnonce'], 'reset_password' ) ) {
			return;
		}

$user = WC_Shortcode_My_Account::check_password_reset_key( $posted_fields['reset_key'], $posted_fields['reset_login'] );

if ( $user instanceof WP_User ) {
			if ( empty( $posted_fields['password_1'] ) ) {
				wc_add_notice( __( 'Please enter your password.', 'woocommerce' ), 'error' );
			}

if ( $posted_fields[ 'password_1' ] !== $posted_fields[ 'password_2' ] ) {
				wc_add_notice( __( 'Passwords do not match.', 'woocommerce' ), 'error' );
			}

$errors = new WP_Error();

do_action( 'validate_password_reset', $errors, $user );

wc_add_wp_error_notices( $errors );

if ( 0 === wc_notice_count( 'error' ) ) {
				WC_Shortcode_My_Account::reset_password( $user, $posted_fields['password_1'] );

do_action( 'woocommerce_customer_reset_password', $user );

wp_redirect( add_query_arg( 'reset', 'true', remove_query_arg( array( 'key', 'login', 'reset-link-sent' ) ) ) );
				exit;
			}
		}
	}

/**
	 * Process the registration form.
	 */
	public static function process_registration() {
		$nonce_value = isset( $_POST['_wpnonce'] ) ? $_POST['_wpnonce'] : '';
		$nonce_value = isset( $_POST['woocommerce-register-nonce'] ) ? $_POST['woocommerce-register-nonce'] : $nonce_value;

if ( ! empty( $_POST['register'] ) && wp_verify_nonce( $nonce_value, 'woocommerce-register' ) ) {
			$username = 'no' === get_option( 'woocommerce_registration_generate_username' ) ? $_POST['username'] : '';
			$password = 'no' === get_option( 'woocommerce_registration_generate_password' ) ? $_POST['password'] : '';
			$email    = $_POST['email'];

try {
				$validation_error = new WP_Error();
				$validation_error = apply_filters( 'woocommerce_process_registration_errors', $validation_error, $username, $password, $email );

if ( $validation_error->get_error_code() ) {
					throw new Exception( $validation_error->get_error_message() );
				}

// Anti-spam trap
				if ( ! empty( $_POST['email_2'] ) ) {
					throw new Exception( __( 'Anti-spam field was filled in.', 'woocommerce' ) );
				}

$new_customer = wc_create_new_customer( sanitize_email( $email ), wc_clean( $username ), $password );

if ( is_wp_error( $new_customer ) ) {
					throw new Exception( $new_customer->get_error_message() );
				}

if ( apply_filters( 'woocommerce_registration_auth_new_customer', true, $new_customer ) ) {
					wc_set_customer_auth_cookie( $new_customer );
				}

wp_safe_redirect( apply_filters( 'woocommerce_registration_redirect', wp_get_referer() ? wp_get_referer() : wc_get_page_permalink( 'myaccount' ) ) );
				exit;

} catch ( Exception $e ) {
				wc_add_notice( '' . __( 'Error', 'woocommerce' ) . ': ' . $e->getMessage(), 'error' );
			}
		}
	}
}

WC_Form_Handler::init();

CANCEL

Name	Type	Size	Modified	Actions
↩ ..	DIR	—	—
📁 abstracts/	DIR	—	2016-11-02 18:33
📁 admin/	DIR	—	2016-11-02 18:33
📁 api/	DIR	—	2016-11-02 18:33
📁 cli/	DIR	—	2016-11-02 18:33
📁 emails/	DIR	—	2016-11-02 18:33
📁 gateways/	DIR	—	2016-11-02 18:33
📁 libraries/	DIR	—	2016-11-02 18:33
📁 payment-tokens/	DIR	—	2016-11-02 18:33
📁 shipping/	DIR	—	2016-11-02 18:33
📁 shortcodes/	DIR	—	2016-11-02 18:33
📁 vendor/	DIR	—	2016-11-02 18:33
📁 walkers/	DIR	—	2016-11-02 18:33
📁 widgets/	DIR	—	2016-11-02 18:33
📄 class-wc-ajax.php	PHP	104.5 KB	2016-11-02 18:33	EDIT
📄 class-wc-api.php	PHP	5.7 KB	2016-11-02 18:33	EDIT
📄 class-wc-auth.php	PHP	10.8 KB	2016-11-02 18:33	EDIT
📄 class-wc-autoloader.php	PHP	2.5 KB	2016-11-02 18:33	EDIT
📄 class-wc-background-updater.php	PHP	2.9 KB	2016-11-02 18:33	EDIT
📄 class-wc-breadcrumb.php	PHP	8.7 KB	2016-11-02 18:33	EDIT
📄 class-wc-cache-helper.php	PHP	7.4 KB	2016-11-02 18:33	EDIT
📄 class-wc-cart.php	PHP	77.1 KB	2016-11-02 18:33	EDIT
📄 class-wc-checkout.php	PHP	30.4 KB	2016-11-02 18:33	EDIT
📄 class-wc-cli.php	PHP	766 B	2016-11-02 18:33	EDIT
📄 class-wc-comments.php	PHP	9.4 KB	2016-11-02 18:33	EDIT
📄 class-wc-countries.php	PHP	29.7 KB	2016-11-02 18:33	EDIT
📄 class-wc-coupon.php	PHP	28.5 KB	2016-11-02 18:33	EDIT
📄 class-wc-customer.php	PHP	12.3 KB	2016-11-02 18:33	EDIT
📄 class-wc-download-handler.php	PHP	13.6 KB	2016-11-02 18:33	EDIT
📄 class-wc-emails.php	PHP	18.1 KB	2016-11-02 18:33	EDIT
📄 class-wc-embed.php	PHP	4.2 KB	2016-11-02 18:33	EDIT
📄 class-wc-form-handler.php	PHP	35.6 KB	2016-11-02 18:33	EDIT
📄 class-wc-frontend-scripts.php	PHP	15.7 KB	2016-11-02 18:33	EDIT
📄 class-wc-geo-ip.php	PHP	30.1 KB	2016-11-02 18:33	EDIT
📄 class-wc-geolocation.php	PHP	9.7 KB	2016-11-02 18:33	EDIT
📄 class-wc-https.php	PHP	4.2 KB	2016-11-02 18:33	EDIT
📄 class-wc-install.php	PHP	33 KB	2016-11-02 18:33	EDIT
📄 class-wc-integrations.php	PHP	976 B	2016-11-02 18:33	EDIT
📄 class-wc-legacy-api.php	PHP	7.2 KB	2016-11-02 18:33	EDIT
📄 class-wc-logger.php	PHP	2.4 KB	2016-11-02 18:33	EDIT
📄 class-wc-order-factory.php	PHP	1.3 KB	2016-11-02 18:33	EDIT
📄 class-wc-order-item-meta.php	PHP	5.4 KB	2016-11-02 18:33	EDIT
📄 class-wc-order-refund.php	PHP	2.4 KB	2016-11-02 18:33	EDIT
📄 class-wc-order.php	PHP	8.8 KB	2016-11-02 18:33	EDIT
📄 class-wc-payment-gateways.php	PHP	5.5 KB	2016-11-02 18:33	EDIT
📄 class-wc-payment-tokens.php	PHP	6.4 KB	2016-11-02 18:33	EDIT
📄 class-wc-post-data.php	PHP	7.5 KB	2016-11-02 18:33	EDIT
📄 class-wc-post-types.php	PHP	23.6 KB	2016-11-02 18:33	EDIT
📄 class-wc-product-external.php	PHP	1.8 KB	2016-11-02 18:33	EDIT
📄 class-wc-product-factory.php	PHP	3 KB	2016-11-02 18:33	EDIT
📄 class-wc-product-grouped.php	PHP	4.1 KB	2016-11-02 18:33	EDIT
📄 class-wc-product-simple.php	PHP	2.3 KB	2016-11-02 18:33	EDIT
📄 class-wc-product-variable.php	PHP	30 KB	2016-11-02 18:33	EDIT
📄 class-wc-product-variation.php	PHP	22.4 KB	2016-11-02 18:33	EDIT
📄 class-wc-query.php	PHP	23.4 KB	2016-11-02 18:33	EDIT
📄 class-wc-session-handler.php	PHP	8.4 KB	2016-11-02 18:33	EDIT
📄 class-wc-shipping-rate.php	PHP	1.9 KB	2016-11-02 18:33	EDIT
📄 class-wc-shipping-zone.php	PHP	13.8 KB	2016-11-02 18:33	EDIT
📄 class-wc-shipping-zones.php	PHP	5.8 KB	2016-11-02 18:33	EDIT
📄 class-wc-shipping.php	PHP	12.3 KB	2016-11-02 18:33	EDIT
📄 class-wc-shortcodes.php	PHP	22.5 KB	2016-11-02 18:33	EDIT
📄 class-wc-tax.php	PHP	25.6 KB	2016-11-02 18:33	EDIT
📄 class-wc-template-loader.php	PHP	3.1 KB	2016-11-02 18:33	EDIT
📄 class-wc-tracker.php	PHP	13.7 KB	2016-11-02 18:33	EDIT
📄 class-wc-validation.php	PHP	4.6 KB	2016-11-02 18:33	EDIT
📄 class-wc-webhook.php	PHP	22 KB	2016-11-02 18:33	EDIT
📄 wc-account-functions.php	PHP	9.7 KB	2016-11-02 18:33	EDIT
📄 wc-attribute-functions.php	PHP	5.9 KB	2016-11-02 18:33	EDIT
📄 wc-cart-functions.php	PHP	11.2 KB	2016-11-02 18:33	EDIT
📄 wc-conditional-functions.php	PHP	10.4 KB	2016-11-02 18:33	EDIT
📄 wc-core-functions.php	PHP	42.3 KB	2016-11-02 18:33	EDIT
📄 wc-coupon-functions.php	PHP	1.7 KB	2016-11-02 18:33	EDIT
📄 wc-deprecated-functions.php	PHP	17.8 KB	2016-11-02 18:33	EDIT
📄 wc-formatting-functions.php	PHP	21.1 KB	2016-11-02 18:33	EDIT
📄 wc-notice-functions.php	PHP	5.7 KB	2016-11-02 18:33	EDIT
📄 wc-order-functions.php	PHP	31.2 KB	2016-11-02 18:33	EDIT
📄 wc-page-functions.php	PHP	6.1 KB	2016-11-02 18:33	EDIT
📄 wc-product-functions.php	PHP	21.4 KB	2016-11-02 18:33	EDIT
📄 wc-rest-functions.php	PHP	9.3 KB	2016-11-02 18:33	EDIT
📄 wc-template-functions.php	PHP	62.3 KB	2016-11-02 18:33	EDIT
📄 wc-template-hooks.php	PHP	9.8 KB	2016-11-02 18:33	EDIT
📄 wc-term-functions.php	PHP	22 KB	2016-11-02 18:33	EDIT
📄 wc-update-functions.php	PHP	33.8 KB	2016-11-02 18:33	EDIT
📄 wc-user-functions.php	PHP	19.2 KB	2016-11-02 18:33	EDIT
📄 wc-webhook-functions.php	PHP	537 B	2016-11-02 18:33	EDIT
📄 wc-widget-functions.php	PHP	1.7 KB	2016-11-02 18:33	EDIT