1 files changed, 26 insertions, 10 deletions
diff --git a/php/src/Google/Protobuf/descriptor.php b/php/src/Google/Protobuf/descriptor.php
index 2263af6e..9c744a8a 100644
--- a/php/src/Google/Protobuf/descriptor.php
+++ b/php/src/Google/Protobuf/descriptor.php
@@ -220,20 +220,36 @@ class Descriptor
     }
 }
 
+function getClassNamePrefix(
+    $classname,
+    $file_proto)
+{
+    $option = $file_proto->getOptions();
+    $prefix = is_null($option) ? "" : $option->getPhpClassPrefix();
+    if ($prefix !== "") {
+        return $prefix;
+    }
+
+    $reserved_words = array("Empty");
+    foreach ($reserved_words as $reserved_word) {
+        if ($classname === $reserved_word) {
+            if ($file_proto->getPackage() === "google.protobuf") {
+                return "GPB";
+            } else {
+                return "PB";
+            }
+        }
+    }
+
+    return "";
+}
+
 function getClassNameWithoutPackage(
     $name,
     $file_proto)
 {
-    if ($name === "Empty" && $file_proto->getPackage() === "google.protobuf") {
-        return "GPBEmpty";
-    } else {
-        $option = $file_proto->getOptions();
-        $prefix = is_null($option) ? "" : $option->getPhpClassPrefix();
-        // Nested message class names are seperated by '_', and package names
-        // are seperated by '\'.
-        return $prefix . implode('_', array_map('ucwords',
-                               explode('.', $name)));
-    }
+    $classname = implode('_', array_map('ucwords', explode('.', $name)));
+    return getClassNamePrefix($classname, $file_proto) . $classname;
 }
 
 function getFullClassName(