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HomeBackend DevelopmentPHP TutorialWORDPRESS插件开发学习(1)HELLO WORLD

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:

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