php在页面加载后多次运行脚本

Question

我正在尝试让php脚本多次运行，以便将几个项目从mysql服务器返回到主页面。 这是代码：

function getServerData(){
var serverData = <?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "testdb";

$conn = new mysqli($servername, $username, $password, $dbname);

if($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "SELECT videoId FROM videoList LIMIT 1;";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo json_encode($row["videoId"]);
        $deleteCommand = "DELETE FROM videoList WHERE videoId = '".$row["videoId"]."';";
        $conn->query($deleteCommand);
        $result = "";
    }
} else {
    echo "'No results'";
}

$conn->close();
?>;
console.log(serverData);
return serverData;
}

是否可以多次使用此代码，或者我是否需要寻找其他路线？