SOAP message must not contain a Document Type Declaration

ext/soap/php_packet_soap.c

@@ -24,6 +24,10 @@ int parse_packet_soap(zval *this_ptr, char *buffer, int buffer_size, sdlFunction
 		add_soap_fault(this_ptr, "SOAP-ENV:Client", "looks like we got no XML document", NULL, NULL TSRMLS_CC);
 		return FALSE;
 	}
+	if (xmlGetIntSubset(response) != NULL) {
+		add_soap_fault(this_ptr, "SOAP-ENV:Client", "DTD are not supported by SOAP", NULL, NULL TSRMLS_CC);
+		return FALSE;
+	}
 
 	/* Get <Envelope> element */
 	env = NULL;

ext/soap/soap.c

@@ -1051,6 +1051,9 @@ PHP_METHOD(soapserver, handle)
 		if (doc_request == NULL) {
 			php_error(E_ERROR, "Bad Request");
 		}
+		if (xmlGetIntSubset(doc_request) != NULL) {
+			php_error(E_ERROR,"DTD are not supported by SOAP");
+		}
 
 		SOAP_GLOBAL(sdl) = service->sdl;
 		deseralize_function_call(service->sdl, doc_request, &function_name, &num_params, &params, &soap_version TSRMLS_CC);