Register Uninstall Hook Example
LINK > https://urlgoal.com/2tfKOY
Understanding the installation sequence is important because it prevents using methods you may be used to. register_activation_hook() is called in-between the user clicking on the activation link and consequently seeing the activation notice. It runs on an intermediary page, which redirects immediately before any hooks can have a chance to run.
Instead of relying on a check that needs to run all the time, we use the activation function to register our post types. Note that once our plugin is activated, the post types will always be registered from the init hook.
The first function, jal_install() creates a new database table. The second function, jal_install_data adds initial data to the table. Instead of using register_activation_hook() to add one function containing all of this code, we can use register_activation_hook multiple times.
There are two ways to run code when uninstalling a plugin. You can use the uninstallation hook via register_uninstall_hook() or you can use a dedicated uninstall.php file within your plugin. I will show you both, but the preferred method is to use the uninstall file.
The plugin should not run arbitrary code outside of functions, when registering the uninstall hook. In order to run using the hook, the plugin will have to be included, which means that any code laying outside of a function will be run during the uninstallation process. The plugin should not hinder the uninstallation process.
If the plugin can not be written without running code within the plugin, then the plugin should create a file named 'uninstall.php' in the base plugin folder. This file will be called, if it exists, during the uninstall process bypassing the uninstall hook.
As to the problem, i think the issue is you're trying to add the deactivation callback during the activation hook, which just seems a little backward or incorrect to me, i'd assume deactivation hooks should be registered in the same way as the activation hook, but neither nested inside the other.
today while looking inside WP Codex, I saw two ways to handle plugin uninstall scripts (like deletings, options, data, tables etc.). One way is using register_uninstall_hook() and the other is by using the simple uninstall.php.
The benefit of uninstall.php, and the reason that it was introduced, is that it allows you to isolate your uninstallation code from the rest of your plugin's code. This means that your entire plugin doesn't have to be loaded when it is uninstalled. That minimizes the chance that your plugin will inadvertently run code during uninstallation that is only intended to be run when the plugin is active. However, in general, you shouldn't be running arbitrary code in your plugin files anyway, most everything should only run if triggered by a hook.
The plugin should not run arbitrary code outside of functions, when registering the uninstall hook. In order to run using the hook, the plugin will have to be included, which means that any code laying outside of a function will be run during the uninstall process. The plugin should not hinder the uninstall process.
Note that uninstall_plugin() will run the pre_uninstall_plugin and uninstall_{$plugin_file} [edit: uninstall_{$plugin_file} will only run if register_uninstall_hook() is used] action hook regardless of which method you use. (See ticket #34569.)
Well, it depends on what you want. register_uninstall_hook() creates hooks and it executes when the uninstall link clicked. That means it actually create a hook which will be called on clicking the uninstall link. Say you developed a plugin and based on that plugin you want to create other plugins and those add on plugins needs to perform operation on based plugin uninstall, then this hook is gonna be useful. Here you'll get a full overview.
I set the debug to true and I got this message:Notice: register_uninstall_hook was called incorrectly. Only a static class method or function can be used in an uninstall hook. Please see Debugging in WordPress for more information.
Here is the solution, I just had to register an uninstall-hook target like this, and then perform the necessary tasks, for removing the directories. In this example ${pkgdatadir} would expand to /usr/share/foo. The if-then is necesseary as otherwise the make distcheck target would fail.
Register an uninstall-hook target, and then perform the necessary tasks, for removing the directories. In this example ${pkgdatadir} would expand to /usr/share/foo. The minus sign in front of rmdir tells make to ignore the return code (so that if the directory isn't empty, make won't fail) Note that the minus sign can be used in front of any make target command.
If your extension has some clean ups to be done when it is uninstalled from VS Code, you can now do that by registering a node script to the uninstall hook vscode:uninstall under scripts section in extension's package.json.
Practically speaking, this means that if you create resources in a hook, youcannot rely upon helm uninstall to remove the resources. To destroy suchresources, you need to eitheradd a custom helm.sh/hook-delete-policyannotation to the hook template file, orset the timeto live (TTL) field of a Jobresource.
To use also other versions of WordPress, I suggest to use the constant WP_UNINSTALL_PLUGIN, because this one exists in version 2.7. Alternative you can use the hook register_uninstall_hook(), since this one is necessary to function via hook. Both possibles are listed in the following examples.
Alternatively you can register the deinstallation via hook, so that you are not depend on the file and you can use a easier possibility to integrate an uninstallation in your Plugin. For that you can use the hook register_uninstall_hook().
You can use hooks to proactively enforce a variety of requirements and guidelines. For example, a security-related hook might verify security groups for the appropriate inbound and outbound traffic rules for your Amazon Virtual Private Cloud (Amazon VPC). A cost-related hook might restrict development environments to only use smaller Amazon Elastic Compute Cloud (Amazon EC2) instance types. A hook designed for data availability could enforce automatic backups for Amazon Relational Database Service (Amazon RDS). All of these hooks can be registered and invoked in your accounts.
To register a hook, submit your hook to be registered either as a private or a public third-party extension. Register your hook with the submit operation. For more information, see Registering hooks for Java and Registering hooks for Python.
Hook targets are the destination where hooks are invoked. You can specify targets such as, CloudFormation resources, registry resources, or custom resource. For example, customers can author a hook targeting AWS::S3::Bucket resource. Hooks support an unlimited number of resource targets.
Target actions are the type of operation that your hook invokes at runtime. For example, if you specify a target action for CREATE on an AWS::S3::Bucket, your hook only invokes when creating an S3 bucket.
Invocation points and target actions specify the exact point where the hook is invoked. Hook handlers hosts executable custom logic for these points. For example, an invocation point of the CREATE operation uses a preCreate handler. Your code written in the hook handler will start any time targets and services perform a matching action.
Probably the most common uninstall technique is to delete plugin options using the WordPress function delete_option(). For example, to remove an option named myplugin_options, add this code to uninstall.php:
As useful as uninstall.php may be, it is important to be careful when removing any data from the database. For example in some cases, users may uninstall a plugin accidentally or temporarily. So if the user has configured options or other data for the plugin, they may be extremely upset to find that changes were lost.
For example, my free WordPress plugin User Submitted Posts enables users to submit posts from the front-end of the site. So its uninstall.php file removes only the plugin options; it does NOT remove any of the user-submitted posts from the database. So you have to be smart about which data to remove.
Registers a hook name (adds it to the list of the known hook names). Used by plugins.It is not necessary to call register, but if you use it, your plugin hook will be used returned bythe getRegistered method. (which itself is used in the demo).
The first time pre-commit runs on a file it will automatically download,install, and run the hook. Note that running a hook for the first time may beslow. For example: If the machine does not have node installed, pre-commitwill download and build a copy of node.
Hook repositories must have a Cargo.toml file which produces at least onebinary (example),whose name should match the entry definition for your hook. The repo will beinstalled via cargo install --bins (with the binaries stored in yourpre-commit cache, not polluting your user-level Cargo installations).
By default, if you have existing hooks pre-commit install will install in amigration mode which runs both your existing hooks and hooks for pre-commit.To disable this behavior, pass -f / --overwrite to the install command.If you decide not to use pre-commit, pre-commit uninstall willrestore your hooks to the state prior to installation.
Hooks can however be confined to a stage by setting the stagesproperty in your .pre-commit-config.yaml, and the corresponding stagesproperty in the hook's .pre-commit-hooks.yaml definition. The stages propertiesare arrays and can contain any of commit, merge-commit, push, prepare-commit-msg,commit-msg, post-checkout, post-commit, post-merge, post-rewrite, and manual.It is useful to provide an appropriate set of stages out of the box in.pre-commit-hooks.yaml hook definitions to avoid unnecessary runs of hooks instages where they do not and can not do anything useful. For example, areasonable setting for code formatter and the like hooks would bestages: [commit, merge-commit, push, manual], and one for hooks that operateon commit messages could be stages: [commit-msg, manual]. 153554b96e