如何从heroku仪表板测试警报的清除？

Question

在悬停的heroku仪表板上，可以通过 # Name Type 1 search_idPrimary int(11) 2 activity varchar(255) 3 description varchar(5000) 4 activity_img varchar(255) 5 origin varchar(255) 6 to varchar(255) 7 date_from date 8 date_to date <?php define('DB_HOST', 'localhost'); define('DB_USER', 'root'); define('DB_PASS', ''); define('DB_NAME', 'website5.0'); //connecting to database and getting the connection object $conn = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME); //Checking if any error occured while connecting if (mysqli_connect_errno()) { echo "Failed to connect to MySQL: " . mysqli_connect_error(); die(); } $stmt = $conn->prepare("SELECT activity, description, activity_img, origin, to, date_from, date_to FROM search;"); $stmt->execute(); $stmt->bind_result( $activity, $description, $activity_img, $origin, $to, $date_from, $date_to); $search = array(); while($stmt->fetch()){ $temp = array(); $temp ['activity'] = $activity; $temp ['description'] = $description; $temp ['activity_img'] = $activity_img; $temp ['origin'] = $origin; $temp ['to'] = $to; $temp ['date_from'] = $date_from; $temp ['date_to'] = $date_to; $array_push ($search, $temp); } echo json_encode($search); ?> 按钮模拟问题警报，但是如何模拟清除警报？

这是仪表板的示例：

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