----------------------------------------System variables and constants used in templates-- -----------------------------------------------
(1) System variables : Output system variables in the template: including 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: output using $Think.const
Note: server, cookie, and config are not case-sensitive, but variables are case-sensitive. For example:
{$Think.server.script_name} is equivalent to {$Think.SERVER.script_name}
SESSION and COOKIE also support the output of two-dimensional arrays
For example:
{$Think.CONFIG.user.user_name}
{$Think.session.user.user_name}
The system does not support array output of more than three dimensions.
(2) Language variable: Output the current language definition value of the project
{$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} //Now time
{$Think.template|basename} //Template page
{$Think.LDELIM} //Template label starting symbol
{$Think.RDELIM} //Template tag end symbol
(4) Configuration parameters: Output the configuration parameter values of the project
{$Think.config.db_charset}
The output value is the same as the result of C('db_charset').
----------------------------------------System constants used in 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 template directory
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 file directory
PLUGIN_PATH // Project plug-in file directory
VENDOR_PATH // Third-party 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 Windows environment
IS_LINUX //Whether it belongs to Linux environment
IS_FREEBSD //Whether it belongs to FreeBsd environment
NOW_TIME // current timestamp
MEMORY_LIMIT_ON // Is there a memory usage limit?
OUTPUT_GZIP_ON // Whether to enable 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__ // Website 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 the current operation (including path)
WEB_PUBLIC_URL //Website public directory
APP_PUBLIC_URL //Project public template directory
---------------------------------------- System constants used in templates---- ----------------------------------
__ROOT__ // Website root directory address
__APP__ // Current project (entry file) address
__URL__ // Current module address
__ACTION__ // Current operation address
__SELF__ // Current URL address
__PUBLIC__ // Website public directory
../Public (not case sensitive) //Project public template directory
Note: When we use constants, check the source code in the browser after the template is loaded. When we observe some URLs that use constants, we will find a phenomenon. We cannot see the IP address of the server, and the URL is from the item.
It starts with the project name, so why can the corresponding controller be accessed correctly? In fact, this is a joke played by the browser on us. When we move the mouse to the URL, right-click and copy the
Paste the URL somewhere else, and the server IP will be displayed. It can be seen that the server IP is included in the constant used in the URL.
---------------------------------------- Custom constants------ ----------------------------------
Create a new common.php under the Common folder in the project folder (eg: Home)
Add the following statement:
define('XXX', XXX); //The first parameter is the constant name, the second parameter is the constant value