private function _getStaticSystemVariables()
{
$static_variables = array('audit_log_buffer_size', 'audit_log_current_session', 'audit_log_file', 'audit_log_format', 'audit_log_policy', 'audit_log_strategy', 'auto_generate_certs', 'back_log', 'basedir', 'bind_address', 'binlog_gtid_simple_recovery', 'character_set_system', 'character_sets_dir', 'core_file', 'daemon_memcached_enable_binlog', 'daemon_memcached_engine_lib_name', 'daemon_memcached_engine_lib_path', 'daemon_memcached_option', 'daemon_memcached_r_batch_size', 'daemon_memcached_w_batch_size', 'datadir', 'date_format', 'datetime_format', 'default_authentication_plugin', 'disabled_storage_engines', 'explicit_defaults_for_timestamp', 'ft_max_word_len', 'ft_min_word_len', 'ft_query_expansion_limit', 'ft_stopword_file', 'gtid_owned', 'have_compress', 'have_crypt', 'have_dynamic_loading', 'have_geometry', 'have_openssl', 'have_profiling', 'have_query_cache', 'have_rtree_keys', 'have_ssl', 'have_statement_timeout', 'have_symlink', 'hostname', 'ignore_builtin_innodb', 'ignore_db_dirs', 'init_file', 'innodb_adaptive_hash_index_parts', 'innodb_additional_mem_pool_size', 'innodb_api_disable_rowlock', 'innodb_api_enable_binlog', 'innodb_api_enable_mdl', 'innodb_autoinc_lock_mode', 'innodb_buffer_pool_chunk_size', 'innodb_buffer_pool_instances', 'innodb_buffer_pool_load_at_startup', 'innodb_checksums', 'innodb_data_file_path', 'innodb_data_home_dir', 'innodb_doublewrite', 'innodb_file_format_check', 'innodb_flush_method', 'innodb_force_load_corrupted', 'innodb_force_recovery', 'innodb_ft_cache_size', 'innodb_ft_max_token_size', 'innodb_ft_min_token_size', 'innodb_ft_sort_pll_degree', 'innodb_ft_total_cache_size', 'innodb_locks_unsafe_for_binlog', 'innodb_log_buffer_size', 'innodb_log_file_size', 'innodb_log_files_in_group', 'innodb_log_group_home_dir', 'innodb_numa_interleave', 'innodb_open_files', 'innodb_page_cleaners', 'innodb_page_size', 'innodb_purge_threads', 'innodb_read_io_threads', 'innodb_read_only', 'innodb_rollback_on_timeout', 'innodb_sort_buffer_size', 'innodb_sync_array_size', 'innodb_sync_debug', 'innodb_temp_data_file_path', 'innodb_undo_directory', 'innodb_undo_tablespaces', 'innodb_use_native_aio', 'innodb_use_sys_malloc', 'innodb_version', 'innodb_write_io_threads', 'language', 'large_files_support', 'large_page_size', 'large_pages', 'lc_messages_dir', 'license', 'locked_in_memory', 'log-bin', 'log_bin', 'log_bin_basename', 'log_bin_index', 'log_bin_use_v1_row_events', 'log_bin_use_v1_row_events', 'log_error', 'log_slave_updates', 'log_slave_updates', 'lower_case_file_system', 'lower_case_table_names', 'max_digest_length', 'mecab_rc_file', 'metadata_locks_cache_size', 'metadata_locks_hash_instances', 'myisam_mmap_size', 'myisam_recover_options', 'named_pipe', 'ndb-batch-size', 'ndb-cluster-connection-pool', 'ndb-cluster-connection-pool-nodeids', 'ndb_log_apply_status', 'ndb_log_apply_status', 'ndb_log_orig', 'ndb_log_orig', 'ndb_log_transaction_id', 'ndb_log_transaction_id', 'ndb_optimized_node_selection', 'Ndb_slave_max_replicated_epoch', 'ndb_use_copying_alter_table', 'ndb_version', 'ndb_version_string', 'ndb-wait-connected', 'ndb-wait-setup', 'ndbinfo_database', 'ndbinfo_version', 'ngram_token_size', 'old', 'open_files_limit', 'performance_schema', 'performance_schema_accounts_size', 'performance_schema_digests_size', 'performance_schema_events_stages_history_long_size', 'performance_schema_events_stages_history_size', 'performance_schema_events_statements_history_long_size', 'performance_schema_events_statements_history_size', 'performance_schema_events_transactions_history_long_size', 'performance_schema_events_transactions_history_size', 'performance_schema_events_waits_history_long_size', 'performance_schema_events_waits_history_size', 'performance_schema_hosts_size', 'performance_schema_max_cond_classes', 'performance_schema_max_cond_instances', 'performance_schema_max_digest_length', 'performance_schema_max_file_classes', 'performance_schema_max_file_handles', 'performance_schema_max_file_instances', 'performance_schema_max_index_stat', 'performance_schema_max_memory_classes', 'performance_schema_max_metadata_locks', 'performance_schema_max_mutex_classes', 'performance_schema_max_mutex_instances', 'performance_schema_max_prepared_statements_instances', 'performance_schema_max_program_instances', 'performance_schema_max_rwlock_classes', 'performance_schema_max_rwlock_instances', 'performance_schema_max_socket_classes', 'performance_schema_max_socket_instances', 'performance_schema_max_sql_text_length', 'performance_schema_max_stage_classes', 'performance_schema_max_statement_classes', 'performance_schema_max_statement_stack', 'performance_schema_max_table_handles', 'performance_schema_max_table_instances', 'performance_schema_max_table_lock_stat', 'performance_schema_max_thread_classes', 'performance_schema_max_thread_instances', 'performance_schema_session_connect_attrs_size', 'performance_schema_setup_actors_size', 'performance_schema_setup_objects_size', 'performance_schema_users_size', 'pid_file', 'plugin_dir', 'port', 'protocol_version', 'relay_log', 'relay_log_basename', 'relay_log_index', 'relay_log_index', 'relay_log_info_file', 'relay_log_recovery', 'relay_log_space_limit', 'report_host', 'eport_password', 'report_port', 'report_user', 'secure_file_priv', 'server_id_bits', 'server_id_bits', 'server_uuid', 'sha256_password_auto_generate_rsa_keys', 'sha256_password_private_key_path', 'sha256_password_public_key_path', 'shared_memory', 'shared_memory_base_name', 'simplified_binlog_gtid_recovery', 'skip_external_locking', 'skip_name_resolve', 'skip_networking', 'skip_show_database', 'slave_load_tmpdir', 'slave_skip_errors', 'slave_type_conversions', 'socket', 'ssl_ca', 'ssl_capath', 'ssl_cert', 'ssl_cipher', 'ssl_crl', 'ssl_crlpath', 'ssl_key', 'system_time_zone', 'table_open_cache_instances', 'thread_concurrency', 'thread_handling', 'thread_stack', 'time_format', 'tls_version', 'tmpdir', 'validate_user_plugins', 'version', 'version_comment', 'version_compile_machine', 'version_compile_os', 'version_tokens_session_number');
return $static_variables;
}