Follows proper autoloading standards (#3123)

* Follows proper autoloading standards
 - Splits PHP classes in descriptor.php into separate files
 - Splits MapFieldIter and RepeatedFieldIter into separate files
 - Moves descriptor.php to Internal/functions.php
 - Moves all namespaced functions into Iternal/functions.php

* fixes Makefile.am for added php files

* [PHP] moves all functions to GPBUtil

* removes description.php from the makefile

1 files changed, 56 insertions, 0 deletions

diff --git a/php/src/Google/Protobuf/Internal/EnumDescriptor.php b/php/src/Google/Protobuf/Internal/EnumDescriptor.php
new file mode 100644
index 00000000..7360a477
--- /dev/null
+++ b/php/src/Google/Protobuf/Internal/EnumDescriptor.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace Google\Protobuf\Internal;
+
+class EnumDescriptor
+{
+
+    private $klass;
+    private $full_name;
+    private $value;
+
+    public function setFullName($full_name)
+    {
+        $this->full_name = $full_name;
+    }
+
+    public function getFullName()
+    {
+        return $this->full_name;
+    }
+
+    public function addValue($number, $value)
+    {
+        $this->value[$number] = $value;
+    }
+
+    public function setClass($klass)
+    {
+        $this->klass = $klass;
+    }
+
+    public function getClass()
+    {
+        return $this->klass;
+    }
+
+    public static function buildFromProto($proto, $file_proto, $containing)
+    {
+        $desc = new EnumDescriptor();
+
+        $enum_name_without_package  = "";
+        $classname = "";
+        $fullname = "";
+        GPBUtil::getFullClassName(
+            $proto,
+            $containing,
+            $file_proto,
+            $enum_name_without_package,
+            $classname,
+            $fullname);
+        $desc->setFullName($fullname);
+        $desc->setClass($classname);
+
+        return $desc;
+    }
+}