Plug-in storage directory
wp-content/plugins
Create a plug-in
Create in plugins For a file plug-in folder, it is best to add a prefix to the name. This prefix can use your name or your own domain name to prevent the plug-in from having the same name as others. Then create a PHP file with the same name as your plug-in.
I create a plug-in called yg-footer-copyright here.
Let WordPress recognize our plug-in
After creating the plug-in, the WordPress backend cannot recognize our plug-in. That is because we did not write the plug-in information according to its standards.
Write the plug-in information in the header of your plug-in entry yg-footer-copyright.php file.
<?php /* Plugin Name: 插件名称 Plugin URI: http://URI_Of_Page_Describing_Plugin_and_Updates Description: 插件的简单描述 Version: 插件版本号, 例如: 1.0 Author: 插件作者 Author URI: http://URI_Of_The_Plugin_Author作者地址 */ ?>
At this time, you can see the plug-in you created by looking at the WordPress backend.
Method called when the plug-in is enabled
Through register_activation_hook this method can add a callback when the plug-in is enabled.
Official document: https://codex.wordpress.org/F...
function ygcopyright_install() {
update_option("yg-copyright","<p>版权信息</p>");
}
//启用插件时调用的方法
register_activation_hook( __FILE__, 'ygcopyright_install' );
Here we add a yg-copyright field in the option table at startup.
Method called when the plug-in is deactivated
Through register_deactivation_hook this method can add a callback when the plug-in is deactivated.
Official document: https://codex.wordpress.org/F...
function ygcopyright_stop(){
update_option("yg-copyright","yes");
}
//停用插件时的方法
register_deactivation_hook( __FILE__, 'ygcopyright_stop' );
Here we change the yg-copyright field in the option table to yes when deactivating.
Operation when deleting the plug-in
When the plug-in is deleted, by default, the uninstall.php file will be found in the plug-in directory and the methods in it will be called.
<?php
//判断是不是从WordPress后台调用的
if(!defined("WP_UNINSTALL_PLUGIN"))
exit();
delete_option("yg-copyright");
?>
Here we’d better add in the uninstall.php file header to determine whether it is called by WordPress background, to prevent others from calling this file directly and delete the plug-in.
Here we delete the yg-copyright field in the option table when deactivating.
If you have any questions, please leave a message.