Basic syntax of php template engine smarty

In the smarty template, both built-in and custom functions have the same syntax. annotation
The template comment is surrounded by the asterisk (*) in the format of {* this is a comment *}
Example: {* Smarty annotation Www.php118.com*} {* Include the header file here *} {include file = "header. tpl"} {* display dropdown lists *} {Html_options values = $ vals selected = $ selected output = $ output}

Function
In the smarty template, both built-in and custom functions have the same syntax.
Built-in functions will work within smarty, such as {if}, {section}, and {strip}. they cannot be modified.
UDFs work through the plug-in mechanism. they are additional functions. you can modify them as you like. you can also add them as needed.
For example, {html_options} and {html_select_date}
Function syntax: {funcname attr1 = "val" attr2 = "val "}
Most functions have their own parameters to regulate and modify their behavior.
The static values of functions in the smarty template engine do not need to be enclosed by quotation marks, but strings must be added.
Variables are referenced when values are assigned, and no quotation marks are required.
Code snippet:
{Html_select_date display_days = yes} {Html_options values = $ vals selected = $ selected output = $ output}As shown in the preceding figure, if the parameter is a Boolean value, double quotation marks are not required.