University Group Project

A bunch of us built a medical appointment scheduling app together at university. It's some of the oldest code I wrote that I still have a copy of. For nostalgia's sake, here's the contents of doctor.php
as seen in the address bar above.
//include 'includes/common.php';
$doctorID = $user->getDoctorID();
$date = isset($_GET['date']) ? $_GET['date'] : DEBUG_DATE;
$res1 = $dbs->query(
'SELECT
Users.lastName
FROM
Doctors,
Users
WHERE
Doctors.userID = Users.userID
AND Doctors.doctorID = %d',
$doctorID
);
$row = $res1->getNextRow();
$doctorName = $row['lastName'];
$page->addData('doctorName', $doctorName);
$res2 = $dbs->query(
'SELECT
Appointments.appointmentID,
Appointments.appointmentType,
Appointments.appointmentDate,
Users.firstName,
Users.lastName
FROM
Doctors,
Appointments,
Patients,
Users
WHERE
Doctors.doctorID = Appointments.doctorID
AND Appointments.patientID = Patients.patientID
AND Patients.userID = Users.userID
AND Doctors.doctorID = %d
AND appointmentDate LIKE \'%s%%\'
ORDER BY
Appointments.appointmentDate
ASC',
$doctorID,
$date
);
$apps = array();
while ($res2->hasNextRow()) {
$row = $res2->getNextRow();
$time = substr($row['appointmentDate'], 11, 5);
$name = $row['firstName'] .' '. $row['lastName'];
$appID = $row['appointmentID'];
$type = $row['appointmentType'];
$apps[$time] = array(
'id' => $appID,
'name' => $name,
'type' => $type,
);
}
$tstamp = datetimeToTimestamp($date);
$page->addData('doctorID', $doctorID);
$page->addData('hours', array('09', '10', '11', '12', '13'));
$page->addData('minutes', array('00', '15', '30', '45'));
$page->addData('viewDate', date(NICE_DATE_FORMAT, $tstamp));
$page->addData('tomorrow', date('Y-m-d', $tstamp + (60 * 60 * 24)));
$page->addData('yesterday', date('Y-m-d', $tstamp - (60 * 60 * 24)));
$page->addData('appointments', $apps);