System constants and system variables commonly used in thinkphp

This article mainly introduces the common system constants and variables in thinkphp, and the friends who need them can refer to the following

----------------------------------------the system variables and constants used in the template----------------------------------------

(1) System variables: output system Variables in a template: Include server, env, session, post, get, request, cookie

{$Think. Server.script_name}//Output $_server variable

{$Think. SESSION.SESSION_ID|MD5}//Output $_session variable

{$Think. Get.pagenumber}//Output $_get variable

{$Think. Cookie.name}//Output $_cookie variable

The above method can also be written as:

{$_server.script_name}//Output $_server variable

{$_SESSION.SESSION_ID|MD5}//Output $_session variable

{$_get.pagenumber}//Output $_get variable

{$_cookie.name}//Output $_cookie variable

System constants: Using $think.const output

Note: Server, cookie, config is case-insensitive, but variables are case-sensitive. For example:

{$Think. Server.script_name} and {$Think. Server.script_name} are equivalent

Session, cookies also support the output of two-dimensional arrays

For example:

{$Think. CONFIG.user.user_name}

{$Think. Session.user.user_name}

The system does not support more than three-dimensional array output.

(2) Language variable: Output the current language definition value of an item

{$Think. Lang.page_error}

{$Think. Const.module_name}

or use it directly.

{$Think. Module_name}

(3) Special variables: constants defined internally by the thinkphp system

{$Think. Version}//version

{$Think. Now}//Present time

{$Think. Template|basename}//Template page

{$Think. Ldelim}//template label start symbol

{$Think. Rdelim}//template tag end symbol

(4) configuration parameter: Output item's configuration parameter value

{$Think. Config.db_charset}

The output value is the same as the result of C (' Db_charset ').

----------------------------------------the system constants used in the action----------------------------------------

Think_path//thinkphp system directory

App_path//Current project directory

App_name//Current project name

Module_name//Current module name

Action_name//Current operation name

Tmpl_path//Project templates Catalog

Lib_path//Project Class Library Directory

Cache_path//project Template Cache Directory

Config_path//project configuration file directory

Log_path//project log file directory

Lang_path//Project Language file directory

Temp_path//Project Temporary Files directory

Plugin_path//Project plug-in file directory

Vendor_path//Third party Class library directory

Data_path//Project data file directory

Is_apache//Whether it belongs to APACHE

Is_iis//Whether it belongs to IIS

Is_win//Whether it belongs to the Windows environment

Is_linux//Whether it belongs to the LINUX environment

IS_FREEBSD//Whether belong to FREEBSD environment

Now_time//Current time stamp

MEMORY_LIMIT_ON//Whether there is a memory usage limit

OUTPUT_GZIP_ON//whether to turn on output compression

MAGIC_QUOTES_GPC//MAGIC_QUOTES_GPC

Think_version//thinkphp Version number

Lang_set//Browser language

Template_name//Current template name

Template_path//Current template path

__root__//Site root directory Address

__APP__//Current project (entry file) address

__URL__//Current module address

__ACTION__//Current operation address

__self__//Current URL address

Tmpl_file_name//Default template name for current operation (including path)

Web_public_url//web site Public directory

App_public_url//Project Public template Catalog

----------------------------------------the system constants used in the template----------------------------------------

__root__//Site root directory Address

__APP__//Current project (entry file) address

__URL__//Current module address

__ACTION__//Current operation address

__self__//Current URL address

__public__//web site Public directory

.. /public (case-insensitive)//Project Public template Catalog

Note: When we use constants, after the template is loaded in the browser to view the source code, we observe some use of the constant URL, we will find a phenomenon, the server's IP address is not seen, URL is from the item

Starting with the name of the head, then why does the correct access to the corresponding controller? In fact, this is the browser to give us a joke, when we move the mouse to the URL, click the right button to copy the source code

URL, paste to another place, the server's IP will be displayed, the visible server IP is included in the URL used in the constant.

----------------------------------------Custom Constants----------------------------------------

Create a new common.php under the common folder in the project folder (such as: Home)

Add the following statement:

Define (' xxx ', xxx); The first argument is a constant name, and the second argument is a constant value