ThinkPHP3.1 constant reference

The path constants of the system and project are used in the system's default directory specification. you can change them by redefinition. if you do not want to customize directories, these constants do not need to be changed. Predefined Constants

Constant	Description
URL_COMMON = 0	Normal mode URL
URL_PATHINFO = 1	PATHINFO URL
URL_REWRITE = 2	REWRITE URL
URL_COMPAT = 3	Compatible Mode URL
HAS_ONE = 1	HAS_ONE Association definition
BELONGS_TO = 2	BELONGS_TO Association definition
Has_records = 3	HAS_MANY Association definition
Many_to_records = 4	MANY_TO_MANY join definition
THINK_VERSION	Framework version number

These predefined constants will not change as the environment changes. Path constants the path constants of the system and projects are used in the default directory specification of the system. you can change them by redefinition. if you do not want to customize directories, these constants do not need to be changed.

Constant name	Description	Default value
CORE_PATH	System core class library directory	THINK_PATH. 'Lib /'
EXTEND_PATH	System Extension Directory	THINK_PATH. 'extend /'
MODE_PATH	Mode extension directory	EXTEND_PATH. 'mode /'
ENGINE_PATH	Engine extension directory	EXTEND_PATH. 'engine /'
VENDOR_PATH	Third-party Class Library Directory	EXTEND_PATH. 'vendor /'
LIBRARY_PATH	System Extension class library directory	EXTEND_PATH. 'Library /'
COMMON_PATH	Project Public Directory	APP_PATH. 'common /'
LIB_PATH	Project Class Library Directory	APP_PATH. 'Lib /'
RUNTIME_PATH	Project runtime Directory	APP_PATH. 'runtime /'
CONF_PATH	Project configuration Directory	APP_PATH. 'conf /'
LOG_PATH	Project log Directory	RUNTIME_PATH. 'logs /'
CACHE_PATH	Project template cache Directory	RUNTIME_PATH. 'cache /'
LANG_PATH	Project language pack Directory	APP_PATH. 'Lang /'
TEMP_PATH	Project cache Directory	RUNTIME_PATH. 'temp /'
DATA_PATH	Project Data Directory	RUNTIME_PATH. 'data /'
TMPL_PATH	Project Template directory	APP_PATH. 'tpl /'
HTML_PATH	Static project cache Directory	APP_PATH. 'HTML /'

The following system constants change with the development environment or settings.

Constant name	Description
IS_CGI	Whether it belongs to CGI mode
IS_WIN	Is it in Windows?
IS_CLI	Whether it belongs to the command line mode
_ ROOT __	Website root directory address
_ APP __	Current project (entry file) address
_ GROUP __	URL of the current group
_ URL __	URL of the current module
_ ACTION __	URL of the current operation
_ SELF __	Current URL
_ INFO __	Current PATH_INFO string
APP_NAME	Current project name
GROUP_NAME	Current group name
MODULE_NAME	Current module name
ACTION_NAME	Current operation name
APP_DEBUG	Debug Mode enabled?
MODE_NAME	Current Mode name
APP_PATH	Current project path
THINK_PATH	System Framework path
MEMORY_LIMIT_ON	System Memory Statistics support
RUNTIME_FILE	Project compilation cache file name
THEME_NAME	Current topic name
THEME_PATH	Path of the current template topic
APP_TMPL_PATH	URL path of the current template
LANG_SET	Current browser language
MAGIC_QUOTES_GPC	MAGIC_QUOTES_GPC