PHP template engine Smarty built-in functions and smarty Functions
This example describes the built-in functions of the PHP template engine Smarty. We will share this with you for your reference. The details are as follows:
Smarty's built-in functions: Smarty comes with some built-in functions, which are part of the template language. You cannot create custom functions with the same name as built-in functions or modify built-in functions.
The following describes the built-in functions in Smarty and provides examples:
The Smarty template engine initialization file init. inc. php and the main file index. php used in the instance
Init. inc. php
<? Php define ('root _ path', dirname (_ FILE _); // set the website ROOT directory require ROOT_PATH. '/libs/Smarty. class. php '; // load the Smarty template engine $ _ tpl = new Smarty (); // create an instance object $ _ tpl-> template_dir = ROOT_PATH. '/tpl/'; // specify the template directory $ _ tpl-> compile_dir = ROOT_PATH. '. /com/'; // specify the compilation directory $ _ tpl-> left_delimiter =' <{'; // re-specify the left delimiter $ _ tpl-> right_delimiter = '}>'; // re-specify the right delimiter?>
Index. php
<? Php require 'init. inc. php'; // introduce the template initialization file global $ _ tpl; $ _ tpl-> display ('index. tpl '); // introduce the template?>
1. capture
| Attribute | Type | Required? | Default Value | Description |
|---|---|---|---|---|
| Name | String | No | Default | Data collection region name |
| Assign | String | No | N/ | Where is the data collection Region allocated to the variable name? [Pending] |
/Tpl/index. tpl
<Html>2. config_load
| Attribute | Type | Required? | Default Value | Description |
|---|---|---|---|---|
| File | String | Yes | N/ | Name of the configuration file to be included |
| Section | String | No | N/ | Name of the part to be loaded in the configuration file |
| Scope | String | No | Local | The data loading scope. The value must be local, parent, or global. local indicates that the variable scope is the current template. parent indicates that the variable scope is the current template and the parent template of the current template (call the template of the current template ). global indicates that the scope of the variable is all templates. |
| Global | Boolean | No | No | Indicates whether the loaded variables are globally visible, which is equivalent to scope = parent. Note: This attribute can be set when the scope attribute is specified, but this attribute is ignored in the template and the scope attribute prevails. |
3. include
| Attribute | Type | Required? | Default Value | Description |
|---|---|---|---|---|
| File | String | Yes | N/ | Template file name to be included |
| Assign | String | No | N/ | This attribute specifies a variable to save the output of the template to be included |
| [Var...] | [Var type] | No | N/ | The local parameter passed to the template to be included. It is valid only in the template to be included. |
The include function is used to include other templates in the current template. the variables in the current template are available in the included template. You must specify the file attribute, which specifies the template resource location. If the assign attribute is set, the variable name corresponding to this attribute is used to save the output of the template to be included, so that the output of the template to be included will not be displayed directly. See the following example:
/Tpl/index. tpl
{include file="header.tpl"}{* body of template goes here *}{include file="footer.tpl"}
4. if, elseif, else
The if statement in Smarty is as flexible and easy to use as the if statement in php, and several features are added to fit the template engine. if must appear in/if pairs. else and elseif clauses can be used.
You can use the following conditional modifiers: eq, ne, neq, gt, lt, lte, le, gte, ge, is even, is odd, is not even, is not odd, not, mod, div by, even by, odd by, = ,! =,>, <, <=,> =. When using these modifiers, they must be opened with an empty lattice with variables or constants.
The meanings of these modifiers are described below:
| Condition Modifier | Role description |
| Eq | = |
| Ne | ! = |
| Neq | ! = |
| Gt | > |
| Lt | < |
| Lte | <= |
| Le | <= |
| Gte | > = |
| Ge | > = |
| Is even | Even number |
| Is odd | Odd or not |
| Is not even | Is it not an even number? |
| Is not odd | Is it not an odd number? |
| Not | ! = |
| Mod | Modulo |
| Div | Can be divisible? |
| Even | Whether the quotient is an even number |
| Odd | Whether the operator is an odd number |
| && | And |
| | | Or |
| () | Parentheses change priority |
5. ldelim and rdelim
The output separator, that is, braces "{" and "}". The template engine always tries to explain the content in braces. Therefore, if you need to output braces, use this method. See the following example:
/Tpl/index. tpl
<Html>6. literal
Data in the literal label area is processed as text, and all characters in the template are ignored. this feature is used to display javascript scripts that may contain characters such as braces. when the information is in the {literal} {/literal} tag, the template engine directly displays the information without analyzing them. In fact, according to the label style in all my examples (because in init. inc. the left and right delimiters have been reset in the php initialization file), rather than the default style of Smarty. This is basically not the case. For how to use this function, see the following example.
/Tpl/index. tpl
7. php
The php tag allows you to directly embed a php script in the template. The tag uses the content inside the tag as a PHP script for parsing and execution. See the following example.
/Tpl/index. tpl
<Html>8. strip
Web developers often encounter situations where spaces and carriage return affect HTML output. To get specific results, you have to run all the labels in the template. this problem is often encountered in difficult-to-understand or difficult-to-handle templates. Before the display, Smarty removes spaces at the beginning and end of the data in the {strip} {/strip} tag and returns the carriage return. This ensures that the template is easy to understand and does not have to worry about unnecessary spaces.
All right, there are so many built-in functions in the Smarty template engine. for the use of the two most important functions (foreach, foreachelse, section, and sectionelse) in the built-in functions, see the previous article titled Usage Analysis of the Smarty built-in functions foreach and foreachelse of the PHP template engine
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