WPPizza – Paypal Standard Gateway

Description

Paypal Gateway for WPPizza – Enables Paypal Payments for orders using the WordPress WPPIZZA Plugin – Requires WPPIZZA 2.15+

Requirements

WPPizza 2.15+
you MUST (obviously) have a PayPal account
iConv (enabled by default on most servers)

Setup

install by uploading the zip file in the normal wordpress manner from withing the plugin screen (add new->upload) and activate
go to wppizza->gateways and set options as required
setup paypal IPN as mentioned here
If you want to offer the ability for customers to pay by credit card without a PayPal account or having to login to PayPal, you need to enable “guest checkout” in your PayPal account (Note: this might not be available for all countries)

Api Username/Passwords/Signature (to enable refunds – since v4.1)

If you want to be able to refund orders directly from within the order history you will need to enter the relevant API credentials.
Login to your PayPal account
Go to https://www.paypal.com/businessmanage/credentials/apiAccess
Click on “Manage API credentials” under “NVP/SOAP API integration (Classic)” (Screenshot)
If asked – select “Request an API signature” and click “Agree and Submit”
The following page will give you “Api Username”, “Api Password” and “Signature” (Screenshot)
Click on “Done” and enter those 3 values into the relevant field of the plugin settings in your WordPress Admin Area (WPPizza->Gateways->Paypal)
To obtain Sandbox credentials, login to your sandbox account instead , and go to https://www.sandbox.paypal.com/businessmanage/credentials/apiAccess, then follow the same steps as described above

Info and Troubleshooting

Screenshots – (click for larger versions)

admin panel/options

4.2
* Added: Also account for additional discounts added by 3rd party plugins
* Added: .pot file
* Fix: A few - inconsequential - typos
7th December 2019

4.1
* Added: Enable refunds from withing order history (requires wpizza v3.1.6+)
5th December 2018

4.0.6
* fix: paypal transaction details were not always added to the db in their entirety (problem was probably introduced in 4.0.4)
20th February 2018

4.0.5
* tweak: making sure ipn ignores any transaction parameters that are not txn_type cart
4th October 2017

4.0.4
* fix: by default (in many cases) paypal returns ipn data with a windows-1252 charset which can cause problems (depending on localization strings set in non-english sites) when updating WP utf-8 database values
29th September 2017

4.0.3
* tweak: added "no_shipping" parameter to submitted values (as it's superfluous)
21th September 2017

4.0.2
* fix/tweak: omitted listener report from capturing in db as it might cause issues on some servers due to character encoding and is somewhat superfluous anyway as the gateway reply parameters contain all details already
* fix: eliminated some possible php notices
19th September 2017

4.0.1
* fix/tweak: ensuring that paypal listener report gets converted into UTF-8 (especially important for non-english sites)
11th September 2017

4.0
* added: support for wppizza v3.x
14th February 2017

3.0.5.2
tweak: added User-Agent and some more debugging info to cUrl requests
5th October 2016

3.0.5.1
tweak: updated field descriptions for a bit more clarity as to what is required
21st May 2016

3.0.5
added: ability to force paypal login language/country (especially useful if paypal checkout always forces paypal registration even though it is set to be optional in your paypal account)
9th May 2016

3.0.4
tweak: better handling of delays / slow responses of paypal IPN's
16th January 2016

3.0.3
fix: minor error logging variables correction
30th October 2015

3.0.2
fix: paypal now sends back 10 even if 10.00 was sent, so amounts did not match and payments were marked as being tampered with
3rd September 2015

3.0.1
* minor fix: eliminated some possible phpnotices
2nd September 2015

3.0
* complete rewrite (almost) to take advantage of inbuilt wppizza functions as well as streamlining of the plugin
* upped requirement to wppizza 2.15
* updated licence handling
* removed NoSSL option (not supported anymore by paypal)
* added editable "processing" string
* added no cache headers to ipn.php for servers that just can't help themselves
* replaced -1000 priority with dynamic priority to work with WPML 3.0+ (actually a WP bug it seems)
2nd September 2015

2.1.7.10
* fix: added esc_sql before serialization and db update
18th July 2015

2.1.7.9
* fix: possibility that order history does not get updated when using non alpha characters in paypal account

*internal: removed some redundant files
18th June 2015

2.1.7.8
* tweak: increased action hook priority to stop other plugins possible interference before redirecting to payment processor
9th April 2015

2.1.7.7
update: now using WP's inbuilt own certificates when using curl/https in IPN listener
24th March 2015

2.1.7.6
fix: added missing menu item size to be sent to paypal alongside menu item name
1st March 2015

2.1.7.5
fix: concat error introduced in page text (introduced in 2.1.7.4)
21st February 2015

2.1.7.4
* fix: as per wp guidelines, load text domain on init and hardcode locale name

* compatibility fix of the content filter with other plugins

15th February 2015

2.1.7.3
* bugfix: error in the way "the_content" filter was used
26th November 2014

2.1.7.2
*SSL3 now disabled/not forced anymore due to POODLE attack

(if you care, read here https://www.google.co.uk/?gws_rd=ssl#q=SSLV3+POODLE+ATTACK)
17th October 2014

2.1.7.1
* temporary fix (hopefully) to work around issues at paypal end (see http://stackoverflow.com/questions/26282587/handling-cart-being-ignored-by-paypal) replacing handling_cart with handling_1
10th October 2014

2.1.7
* replaced mysql_real_escape_string with esc_sql (for updates to WP 3.9 and PHP 5.5+)
17th April 2014

2.1.6
* made return url and cancel url WPML compatible
18th March 2014

2.1.5
* appended wpptx instead of tx as variable to cancel and return urls to not conflict with paypal variables if account settings are set to automatically append internal paypal variables (which also use tx)
* added $this->gatewaySurchargePercent and $this->gatewaySurchargeFixed to be able to - in future developments of the main plugin - calculate and display surcharges *before* sending order to paypal
18th March 2014

2.1.4
* increased priority in EDD actions to be able to activate license more reliably in some server/themes/other plugin setups
* made "Do not use SSL" as well as "Do not empty cart on cancel ?" to be un-checked as default again (got erroneously changed somewhere in the past to be selected by default)
26th February 2014

2.1.3
* increased priority for script to send order to paypal (gateway_submit_to_paypal) to hopefully persuade servers/installations/scenarios that just sat there doing nothing to also now actually go to paypal
* closed div in gateway_button()
* cast vars to string before compare in gateway_handle_response()
* added option to NOT empty cart when user cancels at paypal and returns to site
14th February 2014

2.1.2
* some servers use & as opposed to & for some reason when using http_build_query which results in the script not directing to the paypal checkout but the paypal home page instead. this is now fixed to make this work on those too.
14th January 2014

2.1.1
* added action hook (with order id as parameter) after emails have been sent
20th December 2013

2.1
* Allow for tips/gratuities (added as item)
* Eliminated some php notices
4th December 2013

2.0.1
* Maintenance Release

2.0
* Added (optional) entering of License Key to enable automatic updates from within WP-Dashboard
* Added more info in gateway options settings to troubleshoot email sending / IPN problems
20th November 2013