Added method to retrieve the implementation class from a Value object

include/value.h

@@ -31,6 +31,7 @@ namespace Php {
 /**
  *  Forward definitions
  */
+class Base;
 template <class Type> class HashMember;
 
 /**
@@ -599,6 +600,35 @@ class Value
     Value call(const std::string &name, Value p0, Value p1, Value p2, Value p3, Value p4, Value p5, Value p6, Value p7, Value p8);
     Value call(const std::string &name, Value p0, Value p1, Value p2, Value p3, Value p4, Value p5, Value p6, Value p7, Value p8, Value p9);
 
+    /**
+     *  Retrieve the original implementation
+     * 
+     *  This only works for classes that were implemented using PHP-CPP,
+     *  it returns nullptr for all other classes
+     * 
+     *  @return Base*
+     */
+    Base *implementation() const;
+
+    /**
+     *  Retrieve the original implementation
+     * 
+     *  This only works for classes that were implemented using PHP-CPP,
+     *  it returns nullptr for all other classes
+     * 
+     *  @return mixed
+     */
+    template <typename T>
+    T *implementation() const
+    {
+        // retrieve the implementation
+        Base *base = implementation();
+        if (!base) return nullptr;
+
+        // try casting it
+        return dynamic_cast<T*>(base);
+    }
+
 private:
     /**
      *  Call function with a number of parameters

src/value.cpp

@@ -1553,6 +1553,27 @@ HashMember<std::string> Value::operator[](const char *key)
     return HashMember<std::string>(this, key);
 }
 
+/**
+ *  Retrieve the original implementation
+ * 
+ *  This only works for classes that were implemented using PHP-CPP,
+ *  it returns nullptr for all other classes
+ * 
+ *  @return Base*
+ */
+Base *Value::implementation() const
+{
+    // must be an object
+    if (!isObject()) return nullptr;
+
+    // retrieve the mixed object that contains the base
+    MixedObject *object = (MixedObject *)zend_object_store_get_object(_val);
+    if (!object) return nullptr;
+
+    // retrieve the associated C++ class
+    return object->cpp;
+}
+
 /**
  *  Custom output stream operator
  *  @param  stream