Function and usage of do_undismiss_core_update() in wordpress


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    The do_undismiss_core_update() function in WordPress is a specialized function used to reverse the dismissal of a core update. When WordPress releases new updates, particularly for its core, these updates are shown in the admin area. Administrators have the option to dismiss these updates, which means they will no longer be actively notified about these specific updates. However, there might be scenarios where an administrator needs to reconsider an update that was previously dismissed.

    Function Definition:



    • Undismiss a Core Update: The primary purpose of this function is to undo the action of dismissing a core update notification. This means that once this function is executed, the update that had been dismissed will again appear as an available update in the WordPress admin area.

    Usage Scenario:

    1. Re-evaluating Updates: If an administrator initially dismisses an update, perhaps due to wanting to wait for stability or compatibility checks, but later decides that the update is necessary, this function can be used to bring the update notification back.
    2. Testing and Development: In a staging or testing environment, this function can be used to simulate the process of dismissing and re-evaluating core updates.

    Sample Usage:

    Here's a basic example of how do_undismiss_core_update() might be used:

    // Check if the function exists to avoid errors
    if ( function_exists( 'do_undismiss_core_update' ) ) {
        // Call the function to undismiss a previously dismissed core update

    This code first checks if the do_undismiss_core_update function exists to prevent errors in case the function is not available in the WordPress installation (which could be due to version differences or other factors). If the function is available, it's then called to undismiss a previously dismissed core update.


    • It's important to use this function cautiously as undismissing updates will make them visible again, and administrators should be prepared to handle these updates appropriately.
    • This function should ideally be used in administrative contexts or under the guidance of a site administrator.

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