


Detailed explanation of how to use php Smarty template_PHP tutorial
1. Comments in the template
Each Smarty template file is developed through Web front-end language (xhtml, css and javascript, etc.) combined with the syntax of the Smarty engine.
The language used for web front-end development is exactly the same as the original one, and the comments have not changed either
Smarty comment syntax is 'left terminator variable value*' and '*right terminator variable value'. The content between these two delimiters is the comment content, which can contain one or more lines, and the user can browse the web page to view it. You will not see comments in the original code, they are just comments inside the template. The following is a small example of comments.
$smarty->left_lelimiter = '<{';
$smarty->right_delimiter = '}>';
Note: <{* this a note *}>
The code is as follows | Copy code |
$smarty->left_lelimiter = '<{'; $smarty->right_delimiter = '}>'; Note: <{* this a note *}> |
2: Variable declaration in template
In Smarty, everything is based on variables, and all presentation logic is controlled by the template itself
There are several different types of variables. The type of a variable depends on what symbol it is prefixed with or surrounded by
Variables can be directly output or parameters of job function attributes and modifiers or used in internal conditional expressions, etc.
<{$name}> <{*Regular type variables, you need to call the assign function in the template to assign the value*}>
;
Accessing objects in templates is the same as in php scripts, both through the '->' operator.
Variables in templates cannot be directly assigned values, but they can participate in mathematical operations. As long as mathematical operations can be performed in PHP scripts, they can be applied in templates, as shown below:
<{$foo + 1}> <{* Variable plus 1 *}>
<{$foo * $bar}> <{* Multiply two variables *}>
Copy code | |||||||||
<{$foo * $bar}> <{* Multiply two variables *}>
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The code is as follows | Copy code |
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<{"test `$foo[0]` test"}> <{* array variable enclosed in backticks in double quotes *}>
<{"test `$foo.bar` test"}> <{* Object member variables enclosed in backticks in double quotes *}>
Step 1: Load Smarty template engine, such as: require 'libs/Smarty.class.php'
Step 2: Create a Smarty object, such as: $smarty = new Smarty();
Step 3: Modify Smarty’s default behavior, such as enabling caching, template storage path, etc.
Step 4: Assign the data obtained in the program to the corresponding variables in the template through the assign() method of the Smarty object
Step 5: Use the display() method of the Smarty object to output the template content
assign() method
This method is used to assign values to variables in the template, which is easier to use
Prototype: void assign(string varname,mixed var)
This method can assign the type data supported by php to template variables including arrays and objects
There are two ways to use it
//Specify a pair of 'name/value'
$smarty->assign('question','How are you');
$smarty->assign('answer','not so good');
//Specify to include 'name/value'
$smarty->assign(array('question' => 'How are you','answer' => 'Not so good'));//This method is less used
display() method
This method must be used in Smarty-based scripts, and can only be used once in a script. It is responsible for obtaining and displaying the template referenced by the Smarty engine
Prototype: var display(string template[,string cache_id][,string compile_id])
Parameter 1: template is required, specify the type and path of a legal template resource
Parameter two: cache_id specifies the name of a cache identifier
Parameter 3: compile_id is used when maintaining multiple caches for one page
How to use it is as follows
$smarty->display('tpl/template_dir/template.html');
Simple example
1. libs: It is the Smarty class library
2. tpl/cache_dir: store cache templates
3. tpl/compile_dir: stores compiled template files
4. tpl/config_dir: stores special configuration files
5. tpl/template_dir: store template files
Y 6. In the Smarty.php file, a Smarty class object is released and the attribute values of each object are set, as follows
require 'libs/Smarty.class.php';//Load the Smarty.class.php file
$tpl = new Smarty();
$tpl->compile_dir = SITE_ROOT . 'compile_dir';//Save the compiled template file
$tpl->config_dir = SITE_ROOT . 'config_dir';//Save special configuration files
$tpl->cache_dir = SITE_ROOT . 'cache_dir';//Save Smarty cache files
$ TPL-& GT; Caching = 1; // Enable cache
$tpl->cache_lifetime = 60*60*24;//Cache time 1 day
$tpl->right_delimiter = '}>';//Right terminator
The code is as follows | Copy code | ||||||||
require 'libs/Smarty.class.php';//Load the Smarty.class.php file
$ TPL-& GT; Caching = 1; // Enable cache
$tpl->cache_lifetime = 60*60*24;//Cache time 1 day
7. Index.php file, the homepage code is as follows
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