Function and usage of is_wpmu_sitewide_plugin() in wordpress


Answers ( 1 )


    The is_wpmu_sitewide_plugin() function in WordPress is a deprecated function that was used to determine if a plugin was enabled across the entire network in a WordPress Multisite installation. This function has been replaced by is_network_only_plugin().

    Function Signature:

    is_wpmu_sitewide_plugin( $file )
    • $file: The path to the plugin file relative to the plugins directory.


    • This function was used in WordPress Multisite setups to check if a given plugin was activated network-wide (i.e., across all sites in the network).
    • Being deprecated means that this function is no longer recommended for use in WordPress development as it may be removed in future releases.


    • Instead of using is_wpmu_sitewide_plugin(), you should now use is_network_only_plugin(), which provides the same functionality but adheres to the current WordPress code standards and practices.

    Sample Usage:

    if ( function_exists( 'is_network_only_plugin' ) ) {
        // Check if the plugin is network activated
        if ( is_network_only_plugin( 'my-plugin/my-plugin.php' ) ) {
            // Code for network-only plugin
    } else {
        // Fallback for older WordPress versions
        if ( function_exists( 'is_wpmu_sitewide_plugin' ) && is_wpmu_sitewide_plugin( 'my-plugin/my-plugin.php' ) ) {
            // Code for network-only plugin

    In this example, we first check if is_network_only_plugin() exists to ensure compatibility with the latest WordPress version. If it does, we use it to check if the plugin is network activated. Otherwise, we fall back to is_wpmu_sitewide_plugin() for older WordPress versions. However, it's best to update your WordPress installation to avoid using deprecated functions.

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