我修改了您的代码以为headingOne生成唯一的ID.

I have modified your code to generate unique ids for headingOne.

<?php

   $i=0;
   while ($row = mysqli_fetch_assoc($notice)) {

?>

 <div class="panel-group" id="<?php echo 'accordion'.$i; ?>" role="tablist" aria-multiselectable="true">
    <div class="panel panel-default">
        <div class="panel-heading" role="tab" id="<?php echo 'headingOne'.$i; ?>">
            <h4 class="panel-title">
                <a role="button" data-toggle="collapse" data-parent="<?php echo '#accordion'.$i; ?>" href="#<?php echo $i; ?>" aria-expanded="true" aria-controls="<?php echo 'collapseOne'.$i; ?>">
                    <?php echo $row['title']; ?>
                </a>
            </h4>
        </div>
        <div id="<?php echo $i; ?>" class="panel-collapse collapse" role="tabpanel" aria-labelledby="<?php echo 'headingOne'.$i; ?>">
            <div class="panel-body">
                <?php echo $row['description']; ?>
            </div>
        </div>
    </div>

</div>
<?PHP 
    $i++;
}?>