What is the role of a cronjob in executing PHP scripts at scheduled times?

A cronjob is a scheduled task that runs at specific intervals on a server. To execute PHP scripts at scheduled times using a cronjob, you need to create a cronjob that calls the PHP interpreter with the path to your PHP script as an argument. This will allow the script to run automatically at the specified times without manual intervention.

// Example PHP script to be executed by a cronjob
<?php
echo "Hello, this script was executed by a cronjob!";
?>
```

To set up a cronjob to run this PHP script every day at 3:00 AM, you would add the following line to your crontab file:

```
0 3 * * * /usr/bin/php /path/to/your/script.php