Smarty the method of using GET, post, request, cookie, session variable in the template _php instance

{$smarty} reserved variables do not need to be allocated from PHP scripts, they are array type variables that can be accessed directly in the template, and are typically used to access some special template variables. For example, accessing a page request variable directly in a template, getting a timestamp when accessing a template, accessing a constant in PHP directly, reading a variable from a configuration file, and so on.

1. Accessing page request variables in a template

We can use the Super Global array $_get, $_post, $_request to get data submitted to the server in different ways on the client in PHP scripts, or to track variables between multiple scripts through $_cookie or $_session, or through $_env and $_ Server gets system environment variables. If you need these arrays in the template, you can call the Assign () method in the Smarty object to assign to the template. However, in the Smarty template, you can access these page request variables directly through the {$smarty} retention variables. Examples that are used in templates are as follows:

PHP code

1. {$smarty. get.page} {* php mode: $_get["page"] *}

2. {$smarty. post.page} {* php mode: $_post["page"] *}

3. {$smarty. cookies.username} {* php mode: $_cookie["username"] *}

4. {$smarty. session.id} {* php mode: $_session["id"] *}

5. {$smarty. server.server_name} {* php mode: $_server["SERVER_NAME"] *}

6. {$smarty. Env.path} {* php mode: $_env["PATH"]*}

7. {$smarty. request.username} {* php mode: $_request["username"] *}
2. Accessing variables in PHP in a template

There are two kinds of system constants and custom constants in the PHP script, the same two constants can be accessed in the Smarty template, and do not need to be allocated from PHP, you can directly output the value of a constant simply by retaining the variable through {$smarty}. Examples of output constants in a template are as follows:

1, {$smarty. const._my_const_val} {* Output the custom Constants *} in PHP script

2. {$smarty. const.__file__} {* Direct output of system constants by reserving variable array *}

3. Other

1.{$smarty. Now} variable to access the current timestamp

The output can be formatted with the Date_format adjuster. For example {$smarty. Now|date_format: "%y-%m-%d%h:%m:%s"}

2.{$smarty. Const}

You can access the PHP constants directly. For example {$smarty. Const._my_const_val}

3.{$smarty. Capture}

You can pass {capture}. The output of the {/CAPTURE} structure interception can be accessed using the {$smarty} variable.

4.{$smarty. config}

{$smarty} variable can access a config variable that has already been loaded

For example, {$smarty. Config.foo} can represent {#foo #}

5.{$smarty. Section}, {$smarty. foreach}

{$smarty} variable can access properties of ' section ' and ' foreach ' Loops

6.{$smarty. Template} Displays the name of the template that is currently being processed

7.{$smarty. Version}

Displays the version of the Smarty template

8.{$smarty. Ldelim} Displays the left separator

9.{$smarty. Rdelim} Displays the right separator