How can a PHP script be set up as a cronjob to run every 24 hours?

To set up a PHP script as a cronjob to run every 24 hours, you need to create a cronjob entry that specifies the path to the PHP executable and the path to your PHP script. You can do this by editing your crontab file using the `crontab -e` command. Then, add an entry like `0 0 * * * /usr/bin/php /path/to/your/script.php` to run the script every day at midnight.

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