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, 6 insertions, 6 deletions

diff --git a/php/tests/well_known_test.php b/php/tests/well_known_test.php
index a7760685..1e8c4f42 100644
--- a/php/tests/well_known_test.php
+++ b/php/tests/well_known_test.php
@@ -14,8 +14,8 @@ use Google\Protobuf\Enum;
 use Google\Protobuf\EnumValue;
 use Google\Protobuf\Field;
 use Google\Protobuf\FieldMask;
-use Google\Protobuf\Field_Cardinality;
-use Google\Protobuf\Field_Kind;
+use Google\Protobuf\Field\Cardinality;
+use Google\Protobuf\Field\Kind;
 use Google\Protobuf\FloatValue;
 use Google\Protobuf\GPBEmpty;
 use Google\Protobuf\Int32Value;
@@ -206,11 +206,11 @@ class WellKnownTest extends TestBase {
     {
         $m = new Field();
 
-        $m->setKind(Field_Kind::TYPE_DOUBLE);
-        $this->assertSame(Field_Kind::TYPE_DOUBLE, $m->getKind());
+        $m->setKind(Kind::TYPE_DOUBLE);
+        $this->assertSame(Kind::TYPE_DOUBLE, $m->getKind());
 
-        $m->setCardinality(Field_Cardinality::CARDINALITY_OPTIONAL);
-        $this->assertSame(Field_Cardinality::CARDINALITY_OPTIONAL, $m->getCardinality());
+        $m->setCardinality(Cardinality::CARDINALITY_OPTIONAL);
+        $this->assertSame(Cardinality::CARDINALITY_OPTIONAL, $m->getCardinality());
 
         $m->setNumber(1);
         $this->assertSame(1, $m->getNumber());