Function and usage of is_uninstallable_plugin() in wordpress

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    2024-01-09T00:07:59+00:00

    The is_uninstallable_plugin() function in WordPress is a utility function used to determine if a specific plugin can be uninstalled. Here's a detailed breakdown of its usage:

    Function Signature:

    is_uninstallable_plugin( string $plugin ): bool
    

    Parameters:

    • $plugin (string, required): This parameter takes the path to the plugin file, relative to the WordPress plugins directory. It is essential to provide the correct relative path for the function to work accurately.

    Return Value:

    • The function returns a boolean value (bool):
      • true if the plugin can be uninstalled.
      • false if the plugin cannot be uninstalled.

    Function Description:

    The is_uninstallable_plugin() function is used to check whether a given plugin is uninstallable. In WordPress, a plugin is considered uninstallable if it follows certain criteria, such as having the necessary permissions and not being integral to the WordPress installation. This function checks against these criteria.

    Sample Usage:

    Example 1: Checking if a Plugin is Uninstallable

    $plugin_path = 'sample-plugin/sample-plugin.php'; // Replace with the actual plugin path
    if ( is_uninstallable_plugin( $plugin_path ) ) {
        echo "The plugin is uninstallable.";
    } else {
        echo "The plugin cannot be uninstalled.";
    }
    

    In this example, you replace 'sample-plugin/sample-plugin.php' with the relative path of the plugin you want to check. The function returns true if the plugin can be uninstalled, otherwise false.

    Example 2: Using it in Plugin Uninstallation Logic

    function custom_plugin_uninstall() {
        $plugin_path = 'custom-plugin/custom-plugin.php'; // Your plugin's path
        if ( is_uninstallable_plugin( $plugin_path ) ) {
            // Logic to uninstall the plugin
        }
    }
    

    Here, the is_uninstallable_plugin() function is used as part of a larger uninstallation logic for a custom plugin. It ensures that the uninstallation process proceeds only if the plugin is actually uninstallable.

    Notes:

    • It's important to use this function in the context of WordPress's plugin management system.
    • Always check if the plugin path is correct and relative to the WordPress plugins directory.
    • This function is particularly useful in custom plugin development, where specific uninstallation logic might be required.

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