PHP开发程序,通常都是php代码和html混编在一起,那么这样有什么问题呢?
首先,不利于分工合作。一般来说,都会由程序员来写代码,美工人员设计页面。那么在这种方式中,程序员必须等待美工人员把界面设计好才能开始工作。也就是说程序员和美工的工作是不能同步的。
其次、不利于维护,可维护性差。比如说程序固定后,要修改界面,那么必须由美工修改后,程序员再重新添加。
最后,程序结构混乱,可读性差。HTML和PHP混编在一起,一旦程序一多,就会变的非常的凌乱。
模板技术正是为了解决这些问题而出现的,为了解决这些问题,最早出现的是使用php标签的模板技术。
1. 解释型的 PHPLIB
(1)程序处理过程
$t = new Template()
$t->set_file
$t->set_var
$t->parse
$t->p
翻译成中文就是
初始化模板类$t 设置模板文件 设置模板变量 分析模板文件中的模板变量 输出内容通过了最少5个步骤在php程序中实现模板的处理
(2)处理循环嵌套:
{it}
2. 编译型的 Smarty 的程序处理过程
(1)程序处理过程:
$s = new Smarty
$s->assign
$s->display
翻译成中文就是
初始化模板类 设置模板变量 解析并输出模板(2)处理循环嵌套:
(当然还有foreach这样的)
总结:
PHP不需要非常精通的语法;PHP不需要你自己去开发众多的库;PHP不需要你去为性能、稳定性等语言自身的特性而担心。
PHP需要的是你的逻辑;PHP需要的是你的创造力;PHP需要的是你的思想!!!

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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