title: Does a `pry` equivalent exist for php?
body: <p>I'm a bit spoiled on ruby and am used to using the amazing <a href="http://pryrepl.org" rel="noreferrer"><code>pry</code></a> facilities for apps.  I'll lock an app down to 1 thread and then let pry pop open in the httpd console and then be able to get to the bottom of a lot of issues, however I am not finding anything quite like this available in PHP.  Is there a similar or accepted solution that works like this for PHP for debugging and tracing out data structures, etc. during execution?</p>