What role does a Cronjob play in managing user registrations and activations in PHP applications?

Cronjobs can be used to automate tasks in PHP applications, such as managing user registrations and activations. By setting up a cronjob to run a script at regular intervals, you can check for newly registered users and send activation emails to them. This helps streamline the process and ensures that users are activated in a timely manner.

// Code snippet to run a cronjob for managing user registrations and activations

// Check for newly registered users
// Code to query the database for new users goes here

// Send activation emails to newly registered users
// Code to send activation emails goes here