update conf.py for php highlighting

Author: kay-kim

conf.py

@@ -82,7 +82,6 @@ def has(self, *args):
     'pgp-fingerprint': '9DA31620334BD75D9DCB49F368818C72E52529D4'
 }
 
-pygments_style = 'sphinx'
 
 extlinks = {
     'hardlink' : ( 'http://docs.mongodb.com/{0}/%s'.format(conf.git.branches.current), ''),
@@ -182,6 +181,12 @@ def has(self, *args):
 
 html_sidebars = sconf.sidebars
 
+# Set up PHP syntax highlights
+from sphinx.highlighting import lexers
+from pygments.lexers.web import PhpLexer
+lexers["php"] = PhpLexer(startinline=True)
+lexers["php-annotations"] = PhpLexer(startinline=True)
+
 # -- Options for LaTeX output --------------------------------------------------
 
 latex_documents = []