Constants

const CONFIG_DIR			= 'config'; // NB hardcoded as config/constants.php for bootstrap
const CONFIG_FILE			= 'config/config.php';
const CONFIG_DEFAULTS			= 'config/config_defaults.php';
const SITE_LOCK				= 'config/lock';
const AP_LOCK				= 'config/lock_ap';

const ACTION_DIR			= 'action';
const LANG_DIR				= 'lang';
const FORMATTER_DIR			= 'formatter';
const HANDLER_DIR			= 'handler';
const IMAGE_DIR				= 'image';
const THEME_DIR				= 'theme';
const THUMB_DIR				= 'file/thumb';
const UPLOAD_GLOBAL_DIR			= 'file/global';
const UPLOAD_LOCAL_DIR			= 'file/perpage';
const UPLOAD_BACKUP_DIR			= 'file/backup';
const XML_DIR				= 'xml';

const CACHE_CONFIG_DIR			= '_cache/config';
const CACHE_FEED_DIR			= '_cache/feed';
const CACHE_PAGE_DIR			= '_cache/page';
const CACHE_SQL_DIR			= '_cache/query';
const CACHE_TEMPLATE_DIR		= '_cache/template';
const CACHE_SESSION_DIR			= '/tmp';			// '_cache/session'

const CHMOD_SAFE			= 0640;				// better to use 0600 in production
const CHMOD_FILE			= 0644;				// file creation mode
const CHMOD_DIR				= 0755;				// directory creation mode

const SITEMAP_XML			= 'sitemap.xml';

const HTTP_403				= 'image/upload403.svg';
const HTTP_404				= 'image/upload404.svg';

const DAYSECS				= 86400;			// 24 * 60 * 60

const BACKUP_COMPRESSION_RATE		= 9;				// gzip compression rate
const BACKUP_MEMORY_STEP		= 1048576;			// max bytes to process per cycle (make sure it's at least 10 times less than PHP memory limit!)
const BACKUP_FILE_LOG			= 'backup.log';		// backup log filename
const BACKUP_FILE_STRUCTURE		= 'structure.sql';	// tables structure filename
const BACKUP_FILE_DUMP_SUFFIX		= '.dat.gz';		// tables dump filename suffix
const BACKUP_FILE_GZIP_SUFFIX		= '.gz';			// regular compressed files suffix

const GLOB_ALL				= '{,.}*';			// for glob()
const ADD_NO_DIV			= '*';				// for Wacko::method()
const SYSTEM_LANG			= -1;				// for Wacko::_t()

const COOKIE_SAMESITE			= 'Lax';			// Strict, Lax, None
const AUTH_TOKEN			= 'Auth';
const GUEST				= 'guest@wacko';

const INTERCOM_MAX_SIZE			= 262144;

const LOAD_NOCACHE			= 0;
const LOAD_CACHE			= 1;
const LOAD_ALL				= 0;
const LOAD_META				= 1;

const MENU_AUTO				= 0;
const MENU_USER				= 1;
const MENU_DEFAULT			= 2;

const LINK_PAGE				= 0;
const LINK_FILE				= 1;
const LINK_EXTERNAL			= 2;

const OBJECT_PAGE			= 1;
const OBJECT_FILE			= 2;

const NBSP				= ' ';				// \u{00A0} No-Break Space (NBSP)

const RECOVERY_MODE			= 0;				// 1 - restore database
const AUTO_REWRITE			= 1;				// 0 - off, turns off auto rewrite for debugging,

const SQL_MODE_STRICT		= [
		'mariadb'	=> 'TRADITIONAL,NO_ENGINE_SUBSTITUTION,ONLY_FULL_GROUP_BY',
		'mysql'		=> 'TRADITIONAL,NO_ENGINE_SUBSTITUTION,ONLY_FULL_GROUP_BY'
];
const SQL_MODE_LAX		= [
		'mariadb'	=> 'NO_ENGINE_SUBSTITUTION,NO_AUTO_CREATE_USER',
		'mysql'		=> 'NO_ENGINE_SUBSTITUTION'
];

// Do not change these two lines, PLEASE-PLEASE. In fact, don't change anything! Ever!
const WACKO_VERSION			= '6.1.26';
const HTML_ENTITIES_CHARSET		= 'UTF-8';

const WACKO_ENV				= 4;	// Environment: 1 - development, 2 - test, 3 - stage, 4 - production

const ACTION4DIFF			= 'anchor, toc';	// allowed actions in DIFF

const DB_MIN_VERSION			= ['mariadb' => '10.2.2', 'mysql' => '5.7.7'];
const DB_ERROR_MODE			= 0;	// DB error mode: 0 - silent, 1 - warning, 2 - exception

const PHP_MIN_VERSION			= '8.0';	// minimum required PHP version
const PHP_MAX_VERSION			= '8.3';	// maximum required PHP version
const PHP_ERROR_REPORTING		= 0;		// PHP error reporting: 0 - off, 6 - all