Thinkphp System Constants

Pre-defined constants

Constants	Description
Url_common=0	Normal Mode URL
Url_pathinfo=1	PATHINFO URL
url_rewrite=2	REWRITE URL
Url_compat=3	Compatibility Mode URL
Has_one=1	Has_one Association Definitions
belongs_to=2	BELONGS_TO Association Definitions
Has_many=3	Has_many Association Definitions
Many_to_many=4	Many_to_many Association Definitions
Think_version	Frame version number

These pre-defined constants do not change as the environment changes.

Path constants

System and project path constants are used for the system's default directory specification, and can be redefined by redefining changes, which generally do not need to be changed if you do not want to customize the catalog.

constant Name	Description	Default Value
Core_path	System Core Class Library Directory	Think_path. ' lib/'
Extend_path	System Extensions Directory	Think_path. ' Extend/'
Mode_path	Pattern Extensions Directory	Extend_path. ' mode/'
Engine_path	Engine Extensions Directory	Extend_path. ' engine/'
Vendor_path	Third-party class library catalogs	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 Catalog	App_path. ' lib/'
Runtime_path	Project Run-time catalog	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 Catalog	Runtime_path. ' data/'
Tmpl_path	Project Template Catalog	App_path. ' tpl/'
Html_path	Project Static Cache Directory	App_path. ' Html/'

System constants

The following system constants will change as the development environment changes or settings change.

constant Name	Description
is_cgi	Whether it belongs to CGI mode
Is_win	Whether it belongs to a Windows environment
Is_cli	Whether it belongs to the command line mode
__root__	Site root directory Address
__app__	Current project (entry file) address
__group__	The URL address of the current group
__url__	The URL address of the current module
__action__	The URL address of the current action
__self__	Current URL Address
__info__	The 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	Whether to turn on debug mode
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	Current Template Theme Path
App_tmpl_path	Current Template URL Path
Lang_set	Current browser language
Magic_quotes_gpc	Magic_quotes_gpc

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Thinkphp System Constants