YAP Frequently Asked Questions (FAQ)  This page answers some of
the most common questions we get about YAP and the technologies
which power it. This includes the Yahoo! Application Platform
(YAP) and our Social APIs.    I'm using the PHP SDK but I have
an error. How do I work out what went wrong? Our PHP SDK
helpfully outputs error messages in your web server error's log.
For most Apache installations this is the error_log file,
however it might be a different file depending on your server
configuration. The output consists of a small error message
followed by the request and response objects you sent to the
server. I'm getting an error from the PHP SDK talking about
timestamps, what's going on? If you get an error that says a
timestamp was expected between xxxx-xxxx then the time on your
server is probably wrong. OAuth uses the time since the EPOC in
UTC as part of the request signature. If your server has the
wrong time your app will be creating the wrong signatures. The
most common explanation for this is