Views in ThinkPHP
1. Template comments
In actual project development, the annotation function is often used. If it is a ThinkPHP framework, you can use the following method to annotate in the template file:
{//Comment content}: Single line comment
{/* Comment content */ }: Multi-line comment
Sample code:
Running the above code shows that the template comments in the ThinkPHP framework are server-side comments and will not be displayed in the client browser.
2. fetch to obtain template content
In actual project development, if we only want to obtain the template content but not output it, then we can consider using the fetch method to implement it at this time.
$this->fetch(): ① Load template ② Replace variables
$this->display(): ① Load template ② Replace variables ③ Output template content
Sample code:
3. Variable output
In the ThinkPHP template engine, you can use the assign method to assign variables to the template file and output it. The assigned variable types can be ordinary variables, array variables, and object variables.
1) Ordinary variables
In the template, you can access it through {$variable name}:
2) Array variable
① One-dimensional array
You can use the following methods to display output in the template:
② Two-dimensional array
In the template file, it can be accessed as follows:
3) Object variables
In the template file, it can be accessed as follows:
4. System variables
$Think.server: $_SERVER[]
$Think.get :$_GET[]
$Think.post: $_POST[]
$Think.request: $_REQUEST[]
$Think.cookie: $_COOKIE[]
$Think.session: $_SESSION[]
$Think.config: Read the configuration information in the configuration file
Sample code:
Run results:
5. Use function (variable regulator)
Main function: implement formatting operations on variables, basic syntax:
{$name|fn1|fn2=arg1,arg2,###}
Special note: When using a function, it has a special form: ### represents the current variable itself
Sample code:
6.Default value
In actual project development, a certain variable is often judged. If it is empty, it will not display any content, but the experience is not very friendly, so in order to solve this problem, you might as well consider using the default value. set up:
{$variable|default="default value"}
7. Operators
In some template engines such as Smarty, they cannot directly participate in mathematical operations. However, in the ThinkPHP template engine, it allows direct mathematical operations. The basic syntax is:
+
-
*
/
% {$a%$b}
++ {$a++} or {++$a}
-- {$a--} or {--$a}
Sample code:
In the template page, you can use operators to perform mathematical operations on the above two variables:
The above introduces View 2 in ThinkPHP, including the content of thinkphp. I hope it will be helpful to friends who are interested in PHP tutorials.