我正在使用javascript函数 setInterval 每30秒用ajax检查一次mysql表。使用ajax，它可以用新结果更新页面，而无需重新加载页面。
我想用这个效果 highlight 要给某些记录上色，在下面的示例中，将突出显示id 1和10：

$("#image_li_1").effect("highlight", {}, 25000);
$("#image_li_10").effect("highlight", {}, 25000);

我想强调自上次加载以来添加的所有新记录。
索引.php

// Run polling function every 60 seconds
var myVar = setInterval(myfunction, 30000);

// Load data from check_status page
function myfunction() {
    $.ajax({
        url: "check_status.php", success: function(result2) {
            $("#div2").html(result2);
            $("#title").html("Food Items AUTO Poll");
            $("#image_li_1").effect("highlight", {}, 25000);
            $("#image_li_10").effect("highlight", {}, 25000);
        }
    });
}

检查\u status.php

// Include and create instance of db class
require_once 'DB.class.php';
$db = new DB();

<?php
    // Fetch all items from database
    $data = $db->getRows();
    if (!empty($data)) {
        foreach ($data as $row) {
?>
            <li id="image_li_<?php echo $row['id']; ?>" class="ui-sortable-handle">
                <a href="javascript:void(0);" style="float:none;" class="image_link">
                    <?php echo $row['name']; ?>
                </a>
            </li>
<?php
        }
    }

?>

db.class.php文件

<?php
class DB {
    // Database configuration
    private $dbHost     = "###";
    private $dbUsername = "###";
    private $dbPassword = "###";
    private $dbName     = "###";
    private $itemTbl    = "###";

    function __construct() {
        if (!isset($this->db)) {
            // Connect to the database
            $conn = new mysqli($this->dbHost, $this->dbUsername, $this->dbPassword, $this->dbName);
            if ($conn->connect_error) {
                die("Failed to connect with MySQL: " . $conn->connect_error);
            } else {
                $this->db = $conn;
            }
        }
    }

    // Get rows from data table
    function getRows() {
        $query = $this->db->query("SELECT * FROM ".$this->itemTbl." ORDER BY img_order ASC");
        if ($query->num_rows > 0) {
            while ($row = $query->fetch_assoc()) {
                $result[] = $row;
            }
        } else {
            $result = FALSE;
        }
        return $result;
    }