PHP namespaces for nested messages and enums (#4536)

* uses namespaces for nested messages and enums

* fixes namespaces for PHP dist

* fixes namespace for Descriptors, adds Cardinality and Kind

* fixes nested namespaces for reserved words and adds tests

* adds tests and generator fix for php class prefixes

* fixes escaping of protobuf packages, enum comments, misc others

* nice refactor of generated code

* adds class files for backwards compatibility

* simplifies code with templates

* adds compatibility files to makefile

* cleanup of generator and fixes nested namespace bug

* regenerates proto types

* remove internal BC classes

* adds deprecated warning, adds methods back

* simplifies if statement

* fixes dist files

* addresses review comments

* adds back TYPE_URL_PREFIX constant

* adds @deprecated to old nested class files

* skips tests which require a separate process when protobuf.so is enabled

* Adds tests for legacy nested classes that do not require separate processes to test

* uses legacy names for GPBUtil message check

* adds block for IDE @deprecated message

* Namespace for nested message/enum in c extension

* Remove unused code

1 files changed, 22 insertions, 2 deletions

diff --git a/php/src/Google/Protobuf/Duration.php b/php/src/Google/Protobuf/Duration.php
index ca1c4c07..414a1868 100644
--- a/php/src/Google/Protobuf/Duration.php
+++ b/php/src/Google/Protobuf/Duration.php
@@ -79,9 +79,28 @@ class Duration extends \Google\Protobuf\Internal\Message
      */
     private $nanos = 0;
 
-    public function __construct() {
+    /**
+     * Constructor.
+     *
+     * @param array $data {
+     *     Optional. Data for populating the Message object.
+     *
+     *     @type int|string $seconds
+     *           Signed seconds of the span of time. Must be from -315,576,000,000
+     *           to +315,576,000,000 inclusive. Note: these bounds are computed from:
+     *           60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
+     *     @type int $nanos
+     *           Signed fractions of a second at nanosecond resolution of the span
+     *           of time. Durations less than one second are represented with a 0
+     *           `seconds` field and a positive or negative `nanos` field. For durations
+     *           of one second or more, a non-zero value for the `nanos` field must be
+     *           of the same sign as the `seconds` field. Must be from -999,999,999
+     *           to +999,999,999 inclusive.
+     * }
+     */
+    public function __construct($data = NULL) {
         \GPBMetadata\Google\Protobuf\Duration::initOnce();
-        parent::__construct();
+        parent::__construct($data);
     }
 
     /**
@@ -149,5 +168,6 @@ class Duration extends \Google\Protobuf\Internal\Message
 
         return $this;
     }
+
 }