IF-Else condition in PHP

Based on the status which displays whether appointment is available or unavailable. I want to display if the status is available the user will redirected through a link to new page and if appointment is unavailable the status will be hidden. Not sure where I am going wrong..

</thead>
          <tbody>
          <?php
          if(is_array($appointmentdetails) || isset($displayAppointment)){
          foreach($appointmentdetails as $displayAppointment) { ?> 


          <tr>

            <td><?php print $displayAppointment['DOCTOR_LICENSE_NO']; ?></td>
            <td><?php print $displayAppointment['DOCTOR_FNAME']; ?></td>
            <td><?php print $displayAppointment['DOCTOR_LNAME']; ?></td>
            <td><?php print $displayAppointment['DOCTOR_EMAIL_ID']; ?></td>
            <td><?php print $displayAppointment['DOCTOR_PHONE']; ?></td>
            <td><?php print $displayAppointment['APPOINTMENT_DATE']; ?></td>
            <td><?php print $displayAppointment['APPOINTMENT_TIME']; ?></td>


   --> Here I want to display the given condition 

    <?php if('APPOINTMENT_STATUS'=="Available")
        echo 'APPOINTMENT_STATUS';
                            { ?>    
                                <td><a href="input_user.php?APPOINTMENT_STATUS=<?php print $displayAppointment['APPOINTMENT_STATUS']; ?>"><?php print $displayAppointment['APPOINTMENT_STATUS']; ?></a></td>
                            <?php } 
                             else ?>
                            <?php {?>
                                <td> <input type="hidden" name="APPOINTMENT_STATUS" value="<?php print $displayAppointment['APPOINTMENT_STATUS'];?>" ></td>
                            <?php}?>

          </tr>
          <?php } } ?>
          </tbody>
      </table>

        </body>