PHP_HTTP_API php_http_message_t *php_http_message_init(php_http_message_t *m, php_http_message_type_t t TSRMLS_DC);
PHP_HTTP_API php_http_message_t *php_http_message_init_env(php_http_message_t *m, php_http_message_type_t t TSRMLS_DC);
PHP_HTTP_API php_http_message_t *php_http_message_copy(php_http_message_t *from, php_http_message_t *to);
+PHP_HTTP_API php_http_message_t *php_http_message_copy_ex(php_http_message_t *from, php_http_message_t *to, zend_bool parents);
PHP_HTTP_API void php_http_message_dtor(php_http_message_t *message);
PHP_HTTP_API void php_http_message_free(php_http_message_t **message);