PayPal SDK for PHP
Change Log
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Version 4.3.7: 06-05-2008
WSDL updated for PUSH 52
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Version 4.3.6: 03-05-2008
WSDL updated for PUSH 51
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Version 4.3.5: 12-10-2007
Fixed getOptions() method for PaymentItemInfo::PaymentItem.
WSDL version 50 updated for PUSH 50 
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Version 4.3.4: 10-18-2007
- WSDL 3.3 update
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Version 4.3.3: 08-28-2007
- WSDL 3.2 update - DoReferenceTransactionRequest has a new element: SoftDescriptor
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Version 4.3.2: 07-03-2007
- WSDL 3.2 update
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Version 4.3.1: 04-14-2007
WSDL 3.0 update
Minor look'n'feel changes
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Version 4.3: 01-14-2007
Added samples for MassPay and ReAuth
Proxy support provided
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Version 4.2.2: 10-11-2006
* Updated WSDL
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Version 4.2.1: 09/18/2006
* Sample Clean up for Test Automation Script.
- File name changed for Consistent.
Updated to 42.0 WSDL
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Version 4.2: 07-19-2006
* Updated WSDL

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Version 4.1.1: 05-24-2006
* Documented refactoring changes in README file.

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Version 4.1: 05-15-2006
* Updated WSDL