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From Karsten Eberding <>
Subject PHP WebService library - possible contribution
Date Tue, 18 Sep 2012 18:49:04 GMT

I consider to make a CMIS PHP library available as Open Source, possibly 
through a contribution to Apache Chemistry.

Of course, I am aware of the existing PHP library at, I looked at it closely 
before starting my own work. Let me point out the differences and why a 
second library could be useful:

1) the existing library supports Atom / REST, while my new library uses 
the WebService WSDL binding. Both together would cover both bindings, 
and complete the coverage for CMIS.

2) the existing library uses the PHP cURL functions. My new library uses 
the native PHP SoapClient package, to handle the transformation between 
XML and PHP variables in native code. This is not a big deal on it's 
own, but

3) as a result of using SoapClient, CMIS data structures are returned as 
typed PHP objects. The library defines all 170 CMIS data types, allowing 
to access and work with content data in object form as defined by CMIS.

4) The library is complete, covering 100% of all functions defined in 
the WSDL file, because the library is generated through a code generator 
transforming a WSDL file into PHP code. This ability was the main reason 
to start the development based on WSDL, and not use the existing Atom / 
REST library.

Generating a PHP library from a WSDL file should be useful for cases 
where a repository supports more or less functions than what is defined 
in CMIS. Extensions could be easily added, or functions removed.

I would like to offer the standard PHP library, based on the CMIS 
standard, as Open Source. I am not yet decided for the code generation 
module, and specialized libraries for certain repositories, but I am 
open for suggestions.

The library is available today, still outstanding are further test 
scenarios, a full example application, and complete documentation. 
Current testing is done using Alfresco only, I would be interested to 
expand this to other repositories and WSDL specifications as well.

This new library should in no way replace the existing REST 
implementation, but be another alternative to enhance the overall 
Chemistry offering.

Please let me know your thoughts and interest.

Karsten Eberding

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