php.MVC的模板标签系统(PhpMVC_Tags)现在提供了3种类型的标签:包含指令,声明和表达式.
包含指令能让我们将内容分隔为许多模块,比如:页眉,页脚或者内容.包含的页面可以是HTML,或者其他标签模板页.据个例子,下面的包含指令能用来包含一个页眉:
声明允许我们在模板种声明一个页面级别的变量,或者甚至其他包含页面.一个声明看起来像以下代码:
表达式标签允许我们在模板页中执行表达式.表达式的结果将被包含进模板页.以下表达式将被用来显示一个简单的字符串(salesAreaID),也可以找回框架配置类的属性:
PHP.MVC beta 0.4.0引进了一个新配置类叫做ViewResourcesConfig.这个类能被用来定义能被用在VIEW资源(模板)中的全局参数,并且也能去配置模板标签系统,它将在下面显示.phpmvc-config.xml配置文件中的view-resources元素在下面的显示:
copyright = "Copyright @ 2010 Flash Jack. All rights reserved."
contactInfo = "flash.jack@jackshost.com"
PRocessTags = "true"
compileAll = "true"
className = "MyViewResourcesConfig">
模板页面处理使用模板标签系统能被
processTags = "true"
compileAll = "true"
...
Action Dispatcher
PHP.MVC版本beta 0.4.0以上ActionDispatcher类用来负责使FormBean,Errors,Value(商务数据)和ViewResourcesConfig对象在我们的VIEW(模板)中可以使用.
在检查模板标签系统之前我们应该快速的看一下ActionObjects和ViewResourcesConfig类,当在使用标准的ActionDispatcher时.
ActionObjects
ActionDispatcher使一些对象在我们所使用的模板页面中的应用程序VIEW资源可用.3种标准的ActionObjects为:FormBean,Errors,和Value(商务数据)对象.
一下表格显示了在FormAction和Action类中如何使用FormBean,Errors和Value对象:
Saving ActionObjects in ActionForm Classes
ActionErrors $this->saveErrors($request, $actionErrors)
FormBeans $this->saveFormBean($request, $this)
ValueObjects $this->saveValueObject($request, $valueObject)
Saving ActionObjects in Action Classes
ActionErrors $this->saveErrors($request, $actionErrors)
FormBeans $this->saveFormBean($request, $form)
ValueObjects $this->saveValueObject($request, $valueObject)
Retrieving ActionObjects in View Resources (Templates)
ActionErrors $errors->getItemString('logon_username_reqd')
FormBeans $form->username
ValueObjects $data->salesNorth
一个ActionObject将被初始化为NULL如果对象没有在之前被创建和保存.要想得到ActionObjects的详细信息请看这里:http://www.phpmvc.net/docs/guides/guidesIdx.php?doc=action-objects
View Resources
ActionDispatcher也能暴露ViewResourcesConfig对象到我们的模板页面中.ViewResourcesConfig对象被phpmvc-config.xml配置文件中的
下面这段代码显示了使用模板标签系统的表达式在我们的HTML页眉模板中如何访问ViewResourcesConfig属性:
配置Action Dispatcher
ActionDispatcher是默认的PHP.MVC(在beta 0.4.0以上版本)Dispatcher类.这个Action Dispatcher被包含于框架将默认被使用,除非我们定义了一个类来替代Dispatcher类.在下一节中我们将看到怎样配置我们的应用程序来使用一个替代类--TagActionDispatcher类.

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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