


Using PHP to create a template framework for static websites (2)_PHP Tutorial
The PHP code is all saved into a separate file, which is the file actually called by the page URL. The web server parses the file through the PHP engine and returns the results to the browser. Generally, PHP code always dynamically generates page content, such as querying a database or performing certain calculations. Here is an example:
// example.php
require('class.FastTemplate.php');
$tpl = new FastTemplate('.');
$tpl->define( array( 'main' => 'main.htm',
'header' => 'header.htm',
' leftnav' => 'leftnav.htm' ) );
// The PHP code here sets $content to contain the appropriate page content
$tpl->assign(' CONTENT', $content);
$tpl->parse('HEADER', 'header');
$tpl->parse('LEFTNAV', 'leftnav');
$tpl ->parse('MAIN', 'main');
$tpl->FastPrint('MAIN');
?>
Here we use the popular FastTemplate template class, but the basic idea is the same for many other template classes. First, you instantiate a class and tell it where to find template files and which template file corresponds to which part of the page; then, generate the page content and assign the result to the content identifier; then, parse each template file in turn, The template class will perform the necessary replacement operations; finally, the parsing results will be output to the browser.
This file is entirely composed of PHP code and does not contain any HTML code. This is its biggest advantage. Now, PHP programmers can focus on writing the code that generates the content of the page, rather than worrying about how to generate the HTML to properly format the final page.
You can use this method and the above files to construct a complete website. If the PHP code generates page content based on the query string in the URL, such as http://www.foo.com/example.php?article=099, you can construct a complete magazine website based on this.
It’s easy to see that there is a second benefit to using templates. As shown in the example above, the navigation bar on the left side of the page is saved as a separate file. We only need to edit this template file to change the navigation bar on the left side of all pages of the website.

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.

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.


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