static PHP_RINIT_FUNCTION(libxml)
{
	if (_php_libxml_per_request_initialization) {
		/* report errors via handler rather than stderr */
                xmlSetGenericErrorFunc(NULL, php_libxml_error_handler);
                xmlParserInputBufferCreateFilenameDefault(php_libxml_input_buffer_create_filename);
                xmlOutputBufferCreateFilenameDefault(php_libxml_output_buffer_create_filename);
        }
        return SUCCESS;
 }

Unknown