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Example code of itinerisltd/gf-worldpay

Informations about the package gf-worldpay

gf-worldpay

Packagist Version PHP from Packagist Packagist Downloads GitHub License Hire Itineris

Gravity forms add-on for WorldPay.

Minimum Requirements

Installation

Setup

Payment response(redirection) and Enhancing security with MD5 are mandatory.

In the Integration Setup for your installation using the Merchant Interface > Installations option:

  1. Enable Enable the Shopper Response
  2. Enable Payment Response enabled?
  3. Enter <wpdisplay item=MC_callback> as Payment Response URL
  4. Enter a 25-char random passphrase as Payment Response password
  5. Enter a 30-char random passphrase as MD5 secret for transactions
  6. Enter instId:amount:currency:cartId as SignatureFields

Note that WorldPay truncate long Payment Response password without notices!

Security Concerns about WorldPay HTML API

Not Issue

If Payment Response password(also known ascallbackPW) is incorrect, InvalidResponseException is throw to stop the world. Credit card holders see white screen of death or stuck in "wait for redirection" page in such case.

Features

Not Supported / Not Implemented

Best Practices

HTTPS Everywhere

Although WorldPay accepts insecure HTTP sites, you should always use HTTPS to protect all communication.

Payment Status

Always double check payment status on WorldPay Merchant Interface.

Test Sandbox

Use this test credit card.

FAQ

GF WorldPay is Missing on Form Settings

Gravity Forms capabilities behave differently on multi-user sites and its documents are incomplete. If GF WorldPay is missing on form settings, grant yourself gf_worldpay and gf_worldpay_uninstall capabilities. See: https://docs.gravityforms.com/role-management-guide/

Public API

Build URL for continuing confirmation

ConfirmationHandler::buildUrlFor(Entry $entry, int $ttlInSeconds = 3600): string

Usage:

Use Case: With "using confirmation query strings to populate a form based on another submission":

  1. User fills in formA
  2. User completes WorldPay checkout form
  3. User comes back and hits CallbackHandler
  4. CallbackHandler sends user to formB according to confirmation settings
  5. User arrives formB url with merged query strings

If the user quits before completing formB, you could use ConfirmationHandler::buildUrlFor generate a single-use, short-lived url for the user to resume formB.

Note:

Redirect URL Retrieval Failure Handling

After form submit, this plugin sends order information to WorldPay in exchange for a redirect URL(the WorldPay hosted checkout form URL).

By default, when redirect URL retrieval fails:

  1. Mark entry payment status as Failed
  2. Log the error
  3. wp_die immediately

Common failure reasons:

Tips: Check the log.

You can use 'gf_worldpay_redirect_url_failure_wp_die' filter to:

Important: If this filter returns false, normal Gravity Forms' feed and confirmation flow continues. Improper settings might lead to disasters.

Example:

Preflight

This plugin provides built-in support for preflight-command. No extra setup steps required.

Checker ID: gf-worldpay-production-mode

Coding

Required Reading List

Read the followings before developing:

Gravity Forms

Gravity Forms has undocumented hidden magics, read its source code.

Author Information

gf-worldpay is a Itineris Limited project created by Tang Rufus.

Full list of contributors can be found here.

Feedback

Please provide feedback! We want to make this library useful in as many projects as possible. Please submit an issue and point out what you do and don't like, or fork the project and make suggestions. No issue is too small.

Change log

Please see CHANGELOG for more information on what has changed recently.

License

gf-worldpay is released under the MIT License.

All versions of gf-worldpay with dependencies

PHP Build Version
Package Version
Requires php Version ^7.2
ext-curl Version *
league/omnipay Version ^3.0
omnipay/worldpay Version ^3.0
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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