Using WordPress ‘pre_schema_upgrade()’ PHP function

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The pre_schema_upgrade() WordPress PHP function runs before the schema is upgraded.

Usage

pre_schema_upgrade();

Parameters

  • None

More information

See WordPress Developer Resources: pre_schema_upgrade()

Examples

Add a custom action before schema upgrade

// Create a function to perform custom action
function my_custom_action() {
    // Add your custom action here
}

// Hook the custom function to 'pre_schema_upgrade' action
add_action('pre_schema_upgrade', 'my_custom_action');

Log schema upgrade events

// Create a function to log schema upgrade events
function log_schema_upgrade() {
    error_log("Schema upgrade started.");
}

// Hook the logging function to 'pre_schema_upgrade' action
add_action('pre_schema_upgrade', 'log_schema_upgrade');

Backup database before schema upgrade

// Create a function to backup database
function backup_database() {
    // Add your database backup logic here
}

// Hook the backup function to 'pre_schema_upgrade' action
add_action('pre_schema_upgrade', 'backup_database');

Notify admin before schema upgrade

// Create a function to notify admin
function notify_admin() {
    $admin_email = get_option('admin_email');
    $subject = 'Schema upgrade started';
    $message = 'The schema upgrade process has started on your WordPress site.';
    wp_mail($admin_email, $subject, $message);
}

// Hook the notification function to 'pre_schema_upgrade' action
add_action('pre_schema_upgrade', 'notify_admin');

Disable caching before schema upgrade

// Create a function to disable caching
function disable_caching() {
    if (function_exists('wp_cache_flush')) {
        wp_cache_flush();
    }
}

// Hook the caching function to 'pre_schema_upgrade' action
add_action('pre_schema_upgrade', 'disable_caching');