1 files changed, 26 insertions, 0 deletions
diff --git a/php/src/Google/Protobuf/Syntax.php b/php/src/Google/Protobuf/Syntax.php
index 3a52dc9e1..9812669da 100644
--- a/php/src/Google/Protobuf/Syntax.php
+++ b/php/src/Google/Protobuf/Syntax.php
@@ -4,6 +4,8 @@
 
 namespace Google\Protobuf;
 
+use UnexpectedValueException;
+
 /**
  * The syntax in which a protocol buffer element is defined.
  *
@@ -23,5 +25,29 @@ class Syntax
      * Generated from protobuf enum <code>SYNTAX_PROTO3 = 1;</code>
      */
     const SYNTAX_PROTO3 = 1;
+
+    private static $valueToName = [
+        self::SYNTAX_PROTO2 => 'SYNTAX_PROTO2',
+        self::SYNTAX_PROTO3 => 'SYNTAX_PROTO3',
+    ];
+
+    public static function name($value)
+    {
+        if (!isset(self::$valueToName[$value])) {
+            throw new UnexpectedValueException(sprintf(
+                    'Enum %s has no name defined for value %s', __CLASS__, $value));
+        }
+        return self::$valueToName[$value];
+    }
+
+    public static function value($name)
+    {
+        $const = __CLASS__ . '::' . strtoupper($name);
+        if (!defined($const)) {
+            throw new UnexpectedValueException(sprintf(
+                    'Enum %s has no value defined for name %s', __CLASS__, $name));
+        }
+        return constant($const);
+    }
 }