WP Crontrol


WP Crontrol enables you to view and control what’s happening in the WP-Cron system. From the admin screens you can:

  • 引数、スケジュール、コールバック関数、そして次回の予定時期とともに、すべての cron イベントを表示します。
  • Cron イベントの編集、削除、および即時実行。
  • 新しい Cron イベントの追加。
  • cron イベントの一括削除
  • Add and remove custom cron schedules.

WP Crontrol is aware of timezones, will alert you to events that have no actions or that have missed their schedule, and will show you a warning message if your cron system doesn’t appear to be working (for example if your server can’t connect to itself to fire scheduled cron events).


  1. Cron イベントを管理するには、ツール -> Cron イベントメニューに移動します。
  2. cron スケジュールを管理するには、設定 -> Cron スケジュールメニューに移動します。

Other Plugins

I maintain several other plugins for developers. Check them out:

  • Query Monitor is the developer tools panel for WordPress.
  • User Switching provides instant switching between user accounts in WordPress.


  • Cron events can be modified, deleted, and executed

  • New cron events can be added

  • 新しい cron スケジュールを追加して、プラグイン開発者にイベントをスケジュールするときのオプションを与えることができます。


Does this plugin work with PHP 8?


I get the error “There was a problem spawning a call to the WP-Cron system on your site”. How do I fix this?

If this error is persistent then you should contact your web host for support. It usually means the HTTP connection that runs cron events on your site is failing for some reason.

Why do some cron events miss their schedule?

You can read all about cron events that miss their schedule here.

Why do some cron events reappear shortly after I delete them?

If the event is added by a plugin then the plugin most likely rescheduled the event as soon as it saw that the event was missing. Unfortunately there’s nothing that WP Crontrol can do about this – you should contact the author of the related plugin and ask for advice.

Is it safe to delete cron events?

This depends entirely on the event. You can use your favourite search engine to search for the event name in order to find out which plugin it belongs to, and then decide whether or not to delete it.

If the event shows “None” as its action then it’s usually safe to delete. Please see the other FAQs for more information about events with no action.

Why can’t I delete some cron events?

The WordPress core software uses cron events for some of its functionality and removing these events is not possible because WordPress would immediately reschedule them if you did delete them. For this reason, WP Crontrol doesn’t let you delete these persistent events from WordPress core in the first place.

What does it mean when “None” is shown for the Action of a cron event?

This means the cron event is scheduled to run at the specified time but there is no corresponding functionality that will be triggered when the event runs, therefore the event is useless.

This is often caused by plugins that don’t clean up their cron events when you deactivate them. You can use your favourite search engine to search for the event name in order to find out which plugin it belongs to, and then decide whether or not to delete it.

How do I change the next run time or the recurrence of a cron event?

You can change the time and recurrence of a cron event by clicking the “Edit” link next to the event.

How can I create a cron event that requests a URL?

From the Tools → Cron Events → Add New screen, create a PHP cron event that includes PHP that fetches the URL using the WordPress HTTP API. For example:

wp_remote_get( 'http://example.com' );

Please see the “Which users can manage PHP cron events?” FAQ for information about which users can create PHP cron events.

Why do changes that I make to some cron events not get saved?

Unfortunately WordPress core doesn’t expose all the errors that can occur in its cron event system, so a plugin such as WP Crontrol can’t always tell you if or what went wrong when saving cron events.

You should try deactivating your other plugins one by one to see if one is causing a problem. Otherwise, I’m afraid I don’t have much useful information for you. Hopefully a future version of WordPress will provide better error handling for its cron event system.

Can I see a historical log of all the cron events that ran on my site?

Not yet, but I hope to add this functionality soon.

新しい cron スケジュールを追加しどの様に使用しますか?

Cron のスケジュールは、定期的に実行されるイベントをスケジュールするために WordPress やプラグインで使用されます。 イベントの間隔は、WordPress コアまたはプラグインによって提供され、使用される必要があります。 たとえば、多くのバックアッププラグインは定期的なバックアップをサポートしています。 毎週のバックアップを行うには、WP Crontrol に毎週の cron スケジュールを入力すると、バックアッププラグインはイベントの間隔としてそれを利用できます。

新しい cron イベントを作成するには?

定期的に実行される cron イベント機能を取得するには、2つのステップがあります。 最初のステップは、WordPressにフックについて伝えることです。 これは、WP Crontrol が提供するために作成された部分です。 2番目のステップは、フックが実行されたときに関数を呼び出すことです。

ステップ1: フックを追加する

In the Tools → Cron Events admin panel, click on “Add New” and enter the details of the hook. You’re best off using a hook name that conforms to normal PHP variable naming conventions. The event schedule is how often your hook will be executed. If you don’t see a good interval, then add one in the Settings → Cron Schedules admin panel.

ステップ2: 関数の記述

この部分はPHPコードで (例えば、テーマのfunctions.phpファイルで) 実行されます。フックを実行するために、WordPress はアクションを実行します。このために、このアクションが実行されたときに実行する関数を WordPress に伝える必要があります。次の行はこれを実現します:

add_action( 'my_hookname', 'my_function' );

次のステップは、関数を書くことです。 ここに簡単な例があります:

function my_function() {
    wp_mail( 'hello@example.com', 'WP Crontrol', 'WP Crontrol rocks!' );

新しい PHP cron イベントを作成するにはどうすればよいですか ?

In the Tools → Cron Events admin panel, click on “Add New”. In the form that appears, select “PHP Cron Event” and enter the schedule and next run time. The event schedule is how often your event will be executed. If you don’t see a good interval, then add one in the Settings → Cron Schedules admin panel. In the “Hook code” area, enter the PHP code that should be run when your cron event is executed. You don’t need to provide the PHP opening tag (<?php).

どのユーザーが PHP cron イベントとスケジュールを管理できますか ?

manage_options 権限を持つユーザーだけが cron イベントとスケジュールを管理できます。デフォルトでは、管理者のみがこの機能を備えています。

PHP の cron イベントを管理できるユーザーは?これは危険なのでしょうか?

edit_files 権限を持つユーザーのみが PHP の cron イベントを管理することができます。これは、ユーザーがサイト上のファイルを編集できない場合(プラグインエディタやテーマエディタなど)、PHP の cron イベントを編集したり追加したりすることができないことを意味します。デフォルトでは、管理者のみがこの機能を持ち、マルチサイトを有効にすると特権管理者のみがこの権限を持つようになります。

DISALLOW_FILE_MODSDISALLOW_FILE_EDIT の設定定数でファイル編集が無効になっている場合、どのユーザーも edit_files の権限を持つことができません。

そのため、WP Crontrol を有効にしても、任意の PHP コードを実行するのに必要なユーザーのアクセスレベルは変わりません。

WP-CLI コマンドは利用できますか ?

これまで WP Crontrol に含まれていた cron コマンドは WP-CLI (0.16以降) に含まれているため、このプラグインは WP-CLI コマンドを提供しません。 詳細については、wp help cronを参照してください。


Thank you for your great work. I'm learning a lot about wp-cron process from this plugin. Thanks.


WP Crontrol はオープンソースソフトウェアです。以下の人々がこのプラグインに貢献しています。


“WP Crontrol” は14ロケールに翻訳されています。 翻訳者のみなさん、翻訳へのご協力ありがとうございます。

“WP Crontrol” をあなたの言語に翻訳しましょう。

開発に興味がありますか ?

コードを閲覧するか、SVN リポジトリをチェックするか、開発ログRSS で購読してみてください。



  • Support for more granular cron-related error messages in WordPress 5.7
  • Several accessibility improvements
  • Warning for events that are attached to a schedule that is too frequent
  • More clarity around events and schedules that are built in to WordPress core
  • Add a Help tab with links to the wiki and FAQs


  • Fix the adding of new cron events when DISALLOW_FILE_EDIT is true.


  • Add filters and sorting to the event listing screen. Props @yuriipavlov.
  • Replace the “Add New” tabs with a more standard “Add New” button on the cron event listing page.
  • Switch back to using browser-native controls for the date and time inputs.
  • Add an error message when trying to edit a non-existent event.
  • Introduce an informational message which appears when there are events that have missed their schedule.
  • Fire actions when cron events and schedules are added, updated, and deleted.


  • Fix an issue with the tabs in 1.8.4.


  • Add a warning message if the default timezone has been changed. More information.
  • Fixed string being passed to strtotime() function when the Now option is chosen when adding or editing an event.


  • Fix the editing of events that aren’t currently listed on the first page of results.


  • Bypass the duplicate event check when manually running an event. This allows an event to manually run even if it’s due within ten minutes or if it’s overdue.
  • Force only one event to fire when manually running a cron event.
  • Introduce polling of the events list in order to show a warning when the event listing screen is out of date.
  • Add a warning for cron schedules which are shorter than WP_CRON_LOCK_TIMEOUT.
  • Add the Site Health check event to the list of persistent core hooks.


  • Fix the bottom bulk action menu on the event listing screen.
  • Make the timezone more prominent when adding or editing a cron event.


  • Searching and pagination for cron events
  • Ability to delete all cron events with a given hook
  • More accurate response messages when managing events (in WordPress 5.1+)
  • Visual warnings for events without actions, and PHP events with syntax errors
  • Timezone-related clarifications and fixes
  • A more unified UI
  • Modernised codebase


  • Correct the PHP.net URL for the strtotime() reference.


  • Remove the date and time inputs and replace with a couple of preset options and a plain text field. Fixes #24 .
  • Ensure the schedule name is always correct when multiple schedules exist with the same interval. Add error handling. Fixes #25.
  • Re-introduce the display of the current site time.
  • Use a more appropriate HTTP response code for unauthorised request errors.


  • Remove the ability to delete a PHP cron event if the user cannot edit files.
  • Remove the Edit link for PHP cron events when the user cannot edit the event.
  • Avoid a PHP notice due to an undefined variable when adding a new cron event.


  • Fix a potential fatal error on the cron events listing screen.


  • Introduce bulk deletion of cron events. Yay!
  • Show the schedule name instead of the schedule interval next to each event.
  • Add core’s new delete_expired_transients event to the list of core events.
  • Don’t allow custom cron schedules to be deleted if they’re in use.
  • Add links between the Events and Schedules admin screens.
  • Add syntax highlighting to the PHP code editor for a PHP cron event.
  • Styling fixes for events with many arguments or long arguments.
  • Improvements to help text.
  • Remove usage of create_function().
  • Fix some translator comments, improve i18n, improve coding standards.


  • Show the hooked actions for each cron event.
  • Don’t show the Delete link for core’s built-in cron events, as they get re-populated immediately.
  • Correct the success message after adding or editing PHP cron events.
  • Correct the translations directory name.


  • Switch to requiring cron event times to be input using the site’s local timezone instead of UTC.
  • Add the ability for a PHP cron event to be given an optional display name.
  • Better UX for users who cannot edit files and therefore cannot add or edit PHP cron events.
  • Terminology and i18n improvements.


  • Display a less scary looking message when DISABLE_WP_CRON is defined.
  • Correct the example code for cron event arguments.


  • Improvements to the UI.
  • More error detection when testing WP-Cron functionality.
  • Improve the capability checks for single site and multisite.
  • Lots of escaping and sanitising.
  • Fix various issues with multiple events with the same hook name.
  • Removed the WP-CLI commands, as these have now been added to WP-CLI core (see wp help cron for more info)


  • Tweaks to i18n and date and args formatting
  • Properly escape the crontrol_message query var (props Julio Potier)


  • Added wp crontrol run-event and wp crontrol delete-event WP-CLI commands
  • Clarify language regarding hooks/entries/events


  • Correctly display the local time when listing cron events
  • Remove a PHP notice
  • Pass the WP-Cron spawn check through the same filter as the actual spawner


  • Added support for WP-CLI
  • Removed some PHP4 code that’s no longer relevant


  • Bug fixes for running cron events and adding cron schedules
  • Added a cron spawn test to check for errors when spawning cron
  • Various small tweaks
  • WordPress 3.4 compatibility


  • Input of PHP code for cron events
  • Non-repeating cron events
  • Handles cron events with arguments


  • Internationalization
  • Editing/deleting/execution of cron events
  • More text, status messages, etc.
  • Allow a user to enter a schedule event in a human manner
  • Looks better on WordPress 2.5


  • Fully documented the code.
  • Fixed the bug that the activate action wouldn’t be run if the plugin wasn’t in a subdirectory.
  • Now will play nicely in case any other plugins specify additional cron schedules.
  • Minor cosmetic fixes.


  • Super basic, look at what’s in WP-Cron functionality.