WORDPRESS插件开发学习(一)HELLO WORLD
WORDPRESS插件开发学习系列文章第一篇,在每篇文章的后面追加固定的字符“Hello World”
一.打开wordpress目录->wp-content->plugins
二.在plugins下新建一个目录1100w-hello-world
三.在1100w-hello-world下新建两个文件
1100w-hello-world.php 插件所必须文件,插件的入口文件。放置插件主要功能代码。如果插件包含功能比较多,可以将功能代码放置到不同的php页面中,在本例中,因为只显示hello world,所以功能代码脂肪到1100w-hello-world.php代码中
readme.txt 如果需要将插件分享到wordpress社区中,需要使用这个文件。测试时,可是建立不使用。
建立完成后,目录结构如下:
四.编辑1100w-hello-word.php文件,先输入如下代码
<span style="color: #000000;">php </span><span style="color: #008000;">/*</span><span style="color: #008000;">Plugin Name: Hello-WorldPlugin URI: http://1100w.com/Description: 最简单的插件实现,在每篇文章的后面追加hello worldVersion: 1.0Author: 1100wAuthor URI: http://1100w.comLicense: GPL</span><span style="color: #008000;">*/</span>?>
代码保存后,打开wordpress,进入后台插件管理,虽然没有加入功能代码,但可以看到我们开发的插件信息
以上的注释代码便是wordpress插件的描述代码,格式固定,每个wordpress插件所必须遵守的。分别对应于:
插件名
插件的官方链接
插件描述
版本
作者
作者的官方链接
开源协议
五.在1100w-hello-word.php加入功能代码
<span style="color: #008000;">//</span><span style="color: #008000;">添加过滤器,在the_content显示时,执行hello_world函数,追加返回数据</span>add_filter('the_content','hello_world'<span style="color: #000000;">); </span><span style="color: #008000;">//</span><span style="color: #008000;">回调函数</span><span style="color: #0000ff;">function</span> hello_world(<span style="color: #800080;">$content</span><span style="color: #000000;">){ </span><span style="color: #008000;">//</span><span style="color: #008000;">检测是否为single页面.</span> <span style="color: #0000ff;">if</span><span style="color: #000000;"> ( is_single() ) { </span><span style="color: #008000;">//</span><span style="color: #008000;">添加Hello World.</span> <span style="color: #0000ff;">return</span> <span style="color: #800080;">$content</span> . "<h1 id="Hello-World"> Hello World </h1>"<span style="color: #000000;">; } </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> { </span><span style="color: #008000;">//</span><span style="color: #008000;">如果是其它页面不予处理。</span> <span style="color: #0000ff;">return</span> <span style="color: #800080;">$content</span><span style="color: #000000;">; }}</span>
六.激活插件,打开一篇链接,插件功能显示如下:

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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