[Tracker] It doesn't index PHP files

[Adam Tauno Williams <awilliam whitemice org>]

A friend said that Tracker does not index the contents of PHP files... i
though nah, no way.  It certainly indexes the contents of my Python
scripts.  But when I went and tried - I can't get a PHP file in the
result except by filename match.

Why doesn't Tracker index the PHP files?   Am I missing something, a
setting, or does it just not have an extractor for PHP?

tracker-0.14.2-26.1.x86_64 openSUSE 12.2 x86_64 GNOME 3.6

### Matches filename?

awilliam linux-nysu:~> tracker-search jsonRPCClient
Results:
  file:///home/awilliam/Documents/Development/PHP/jsonRPCClient.php
  file:///home/awilliam/Documents/Organizations/MI/OGo/CRM%20&%
20Hedera/TireSale/tiresale.py
file:///home/awilliam/Documents/Works/Coils.MD/snurtle-code/build/lib/snurtle/jsonrpc.py

#### does not match word found in the header

awilliam linux-nysu:~> tracker-search Vaccaro
Results:

#####  does not match method name in the file

awilliam linux-nysu:~> tracker-search setRPCNotification
Results: