Analysis of variable output of ThinkPHP template engine

不言
Release: 2023-03-30 22:14:01
Original
1494 people have browsed it

This article mainly introduces the usage of variable output of ThinkPHP template engine, and analyzes the common usage and usage skills of variable output. It is of great practical value. Friends in need can refer to it

This article analyzes ThinkPHP with examples Usage of variable output in template engine. Share it with everyone for your reference. The specific analysis is as follows:

We already know that we can use the assign method in Action to assign values ​​to template variables. How to output the value of the variable in the template file after assigning it?

If we assign a name template variable in Action:

$name = 'ThinkPHP';
$this->assign('name',$name);
Copy after login

Use the built-in template engine to output the variable, just use it in the template file:
{$name}

The result after template compilation is

<?php echo($name);?>
Copy after login

When it is finally run, the output result of ThinkPHP can be displayed at the label position. Note that there cannot be any spaces between the { and $ of the template label, otherwise the label will be invalid. The default start tag of ordinary tags is {, and the end tag is }. It can also be changed by setting TMPL_L_DELIM and TMPL_R_DELIM. For example, we define in the project configuration file:

&#39;TMPL_L_DELIM&#39;=>&#39;<{&#39;,  
&#39;TMPL_R_DELIM&#39;=>&#39;}>&#39;,
Copy after login

Then, the above variable output label should be changed Into:

<{$name}>
Copy after login

We will use the default tag definition to explain the following content. The first parameter in the assign method is the variable name used in the template file. If it is changed to the following code:

$name = &#39;ThinkPHP&#39;;
$this->assign(&#39;name2&#39;,$name);
Copy after login

The output will be invalid if {$name} is used again. {$name2} must be used to output the value of the template variable. If we need to assign a user data object to the template variable:

$User = M(&#39;name&#39;);
$user = $User->find(1);
$this->assign(&#39;user&#39;,$user);
Copy after login

Also That is to say, $user is actually an array variable. We can use the following method to output related values:

{$user[&#39;name&#39;]}//输出用户的名称
{$user[&#39;email&#39;]} //输出用户的email地址
Copy after login

If $user is an object instead of an array.

$User = M(&#39;name&#39;);
$User->find(1);
$this->assign(&#39;user&#39;,$User);
Copy after login

You can use the following Output related attribute values ​​in the following way:

{$user:name}// 输出用户的名称
{$user:email} // 输出用户的email地址
Copy after login

After version 3.1, the class attribute output method has been adjusted to support the native PHP object writing method, so the above tag needs to be changed to:

{$user->name}// 输出用户的名称
{$user->email} // 输出用户的email地址
Copy after login

In order to facilitate template definition, dot syntax can also be supported. For example, the above

{$user[&#39;name&#39;]}// 输出用户的名称
{$user[&#39;email&#39;]} // 输出用户的email地址
Copy after login

can be changed to

{$user.name}
{$user.email}
Copy after login

. Because the default output of dot syntax is array mode, the above two methods are available without It is equivalent under configuration. We can determine the output effect of point syntax by configuring the TMPL_VAR_IDENTIFY parameter. Take the following output as an example: {$user.name}

If TMPL_VAR_IDENTIFY is set to array, then

{$user.name} is equivalent to {$user['name']}, which is the output array variable.

If TMPL_VAR_IDENTIFY is set to obj, then

{ $user.name} is equivalent to {$user:name}, which is the attribute of the output object.

If TMPL_VAR_IDENTIFY is left blank, the system will automatically determine whether the variable to be output is an array or an object. This method will affect efficiency to a certain extent, and only supports two-dimensional arrays and two-level object attributes.

If it is the output of a multi-dimensional array or multi-layer object attribute, you can use the following definition method:

{$user.sub.name}//使用点语法输出
Copy after login

or use

{$user[&#39;sub&#39;][&#39;name&#39;]}// 输出三维数组的值  
{$user:sub:name}// 输出对象的多级属性
Copy after login

The above is the entire content of this article, I hope it will be helpful Everyone’s learning is helpful. For more related content, please pay attention to the PHP Chinese website!

Related recommendations:

Usage of action classes in Laravel program architecture design

ThinkPHP template range judgment output In tag and Range tag usage

The above is the detailed content of Analysis of variable output of ThinkPHP template engine. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template