无法在单选按钮之间切换

I want to display a columns with radio buttons based on a data from mysql table and using php , but I am not able to toggle between the radio buttons. Below is the code.

                while($rows = $stmt->fetch(PDO::FETCH_ASSOC)){ ?>
                    <tr>
                        <td border="0" type="hidden"  style="display:none;"><input type="hidden" name="hidden" value=<?php echo $rows['member_id']; ?></td>   
                        <td class="center"><?php echo $rows['username']; ?></td>
                        <td class="center"><?php echo $rows['email']; ?></td>
                        
                        <?PHP if($_SESSION['user_group'] == 63){
                         echo  '<td class="center"><input type="radio" id='?><?php echo $rows['username']; 'name="gp" value="system admin"' ?>
                              <?php echo ($rows['permission']== 31 )?'checked':'' ?>'</input> </td>' <?PHP ;                         
                        echo '<td class="center"><input type="radio" id='?><?php echo $rows['username']; 'name="gp" value="admin"' ?>
                        <?php echo($rows['permission']== 15 )?'checked':'' ?> '</input> </td>' <?PHP ;
                            echo  '<td class="center"><input type="radio" id='?><?php echo $rows['username'];'name="gp" value="user"'
                             ?><?php echo ($rows['permission']== 1 )?'checked':'' ?> '</input> </td>' <?PHP ; }
                
                         elseif($_SESSION['user_group'] == 31){                                   
                        echo '<td class="center"><input type="radio" id='?><?php echo $rows['username']; 'name="gp" value="admin"' ?>
                        <?php echo($rows['permission']== 15 )?'checked':'' ?> '</input> </td>' <?PHP ;
                            echo  '<td class="center"><input type="radio" id='?><?php echo $rows['username'];'name="gp" value="user"'
                             ?><?php echo ($rows['permission']== 1 )?'checked':'' ?> '</input> </td>' <?PHP ; }
                             elseif($_SESSION['user_group'] == 15){                                               
                            echo  '<td class="center"><input type="radio" id='?><?php echo $rows['username'];'name="gp" value="user"'
                             ?><?php echo ($rows['permission']== 1 )?'checked':'' ?> '</input> </td>' <?PHP ; }?>
                        
                                                
                         <td class="center"><button name="update" type="update">submit</button></td>         
                           </tr>               
                    <?php
                }

looks like there is an error in the code. Any help with it. The current rendition is below.

enter image description here

I want to toggle between the radio buttons.

</div>

was able to figure it out. Deleted echo command from the beginning of the html column lines. the code is presented below.

while($rows = $stmt->fetch(PDO::FETCH_ASSOC)){ ?>
                    <tr>
                        <td border="0" type="hidden"  style="display:none;"><input type="hidden" name="hidden" value=<?php echo $rows['member_id']; ?></td>   
                        <td class="center"><?php echo $rows['username']; ?></td>
                        <td class="center"><?php echo $rows['email']; ?></td>
                        
                        <?PHP if($_SESSION['user_group'] == 63){ ?>
                                   <td class="center"><input type='radio' id=<?php echo $rows['username']; ?> name="gp" value="system admin"
                              <?php echo ($rows['permission']== 31 )?'checked':'' ?>></input> </td>
                        <td class="center"><input type='radio' id=<?php echo $rows['username']; ?> name="gp" value="admin"
                             <?php echo ($rows['permission']== 15 )?'checked':'' ?> ></input> </td>
                              <td class="center"><input type='radio' id=<?php echo $rows['username']; ?> name="gp" value="user"
                             <?php echo ($rows['permission']== 1 )?'checked':'' ?> ></input> </td> <?PHP }
                
                         elseif($_SESSION['user_group'] == 31){ ?>                                     
                        <td class="center"><input type='radio' id=<?php echo $rows['username']; ?> name="gp" value="admin"
                             <?php echo ($rows['permission']== 15 )?'checked':'' ?> ></input> </td>
                              <td class="center"><input type='radio' id=<?php echo $rows['username']; ?> name="gp" value="user"
                             <?php echo ($rows['permission']== 1 )?'checked':'' ?> ></input> </td>  <?PHP }
                             elseif($_SESSION['user_group'] == 15){ ?>                                             
                            <td class="center"><input type='radio' id=<?php echo $rows['username']; ?> name="gp" value="user"
                             <?php echo ($rows['permission']== 1 )?'checked':'' ?> ></input> </td><?PHP }?>

This worked just fine.

</div>