Hawkstein

PHP version 5.6.27 The code you provided seems to works fine, no errors. Also, I am able to read list items using the example code. Just can't add/write.

I tried adding list items to the examples/test site (SharePoint Online) and had no issue (I changed the connection settings in my own code). The only difference is my site...

Nope, add/write doesn’t work with SharePoint 2013 when using NTLM auth. Had to use another library.