diff --git a/lib/rouge/lexers/php.rb b/lib/rouge/lexers/php.rb
index 50ceb7dc6f..2c3d344dea 100644
--- a/lib/rouge/lexers/php.rb
+++ b/lib/rouge/lexers/php.rb
@@ -117,7 +117,8 @@ def self.detect?(text)
         end
 
         rule %r/(void|\??(int|float|bool|string|iterable|self|callable))\b/i, Keyword::Type
-        rule %r/[~!%^&*+=\|:.<>\/?@-]+/, Operator
+        rule %r/[~!%^&*+=\|:.<>\/@-]+/, Operator
+        rule %r/\?/, Operator
         rule %r/[\[\]{}();,]/, Punctuation
         rule %r/(class|interface|trait)(\s+)(#{nsid})/i do
           groups Keyword::Declaration, Text, Name::Class
diff --git a/spec/visual/samples/php b/spec/visual/samples/php
index 948a4a7f43..bc05852030 100644
--- a/spec/visual/samples/php
+++ b/spec/visual/samples/php
@@ -628,4 +628,13 @@ class Zip extends Archive {
 }
 
 ?>
+
+<?php if (true): ?><!-- Notice the space between the colon & question mark -->
+  <p>Hello world!</p>
+<?php endif ?>
+
+<?php if (true) :?><!-- No space -->
+  <p>Hello world!</p>
+<?php endif ?>
+
 <p>it's html here at the end, too.</p>