Javascript 当单击其他选择元素选项时，如何将Mysql数据加载到html选择元素中

请注意，我最近在ajax请求代码中遇到了一个关键问题。 问题：我试图使用php从mysql数据库加载数据，但在我的程序中单击了一个html选择标记选项，该选项用于将从数据库接收到的数据加载到另一个html选择标记中。因此，它在Firefox浏览器中工作，但在其他浏览器如chrome.g、safari和opera中不起作用。为了得到更多的澄清，我将在下面留下我的代码。多谢各位

ajax:
get_service_categories_ready_for_booking_selection();
function get_service_categories_ready_for_booking_selection() {
    $.ajax({
        url: "query.php",
        method: "POST",
        data: {getServicesCategoriesReadyForBooking:1},
        success: function (data, status) {
            $("#display-services-categories-options").html(data);
            console.log(status)
        }
    });
}

$("body").on("click", "#service_cate_options", function () {
    var cate_id = $(this).attr("s_cate_id");
    $.ajax({
        url: "query.php",
        method: "POST",
        data: {getServicesReadyForUsingCategoriesBooking:1, cate_id:cate_id},
        success: function (data, status) {
            $("#display-services").html(data);
            console.log(status)
            // load_selected_service_cost();
        }
    });
});

PHP:
function fetch_services_based_on_selected_category(){
    include("includes/db.php");
    $output = "";
    $cate_id = mysqli_real_escape_string($con, $_POST["cate_id"]);

    $query = "SELECT * FROM `services` WHERE `cate_id`='".$cate_id."'";
    $run = $con->query($query);
    $output .= "<option>Select your choice of service</option>";
    if ($run->num_rows > 0) {
        while ($row = $run->fetch_array()) {
            $service_id = $row["id"];
            $service_name = $row["title"];
            $service_charge = $row["cost"];

            $output .= "<option id='service_options' service_id='".$service_id."'>".$service_name."</option>";
        }
    }else{
            $output .= "<option>We're currently out of services</option>";
        }
    return $output;
}

HTML:

检查你的

确保url路径正确。那么这个应该很好用！如果这是你要找的，请按回答回答

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另外：请检查此ID:service_cate_options未提及任何内容。我想您应该参考一个选择选项

感谢同事的所有贡献，尽管上面提供的答案都无法解决问题，因此：

HTML选择元素：

<select class="form-control form-control-sm cate_name" id="display-services-categories-options">
</select>

jquery之后：

PHP之前：

PHP之后：

在php代码中，将自己创建的属性名称更改为select选项ID所指定的值

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有关详细信息：[https://www.codegrepper.com/code-examples/delphi/how+要+get+value+from+select+option+使用+input+name+in+jquery][1]

您可以显示您的HTML和PHP，在那里您可以调用基于所选类别函数的获取服务吗？您的代码也可能受到SQL注入攻击！Service Eyid不是一个添加到任何HTML元素的有效属性——考虑使用DataSet属性来替代，例如DataService EdId＝X EtCurn ID使用IE：Service Enter选项必须是唯一的眼睛，每个选择选项都有它唯一的ID$输出。

<select class="form-control form-control-sm cate_name" id="display-services-categories-options">

<select class="form-control form-control-sm cate_name" id="display-services-categories-options" onChange="get_service_categories_ready_for_booking_selection()">

<select class="form-control form-control-sm cate_name" id="display-services-categories-options" onChange="get_service_categories_ready_for_booking_selection(this.value)">

function get_service_categories_ready_for_booking_selection(id) {
    $.ajax({
        url: "query.php",
        method: "POST",
        data: {getServicesCategoriesReadyForBooking:id},
        success: function (data, status) {
            $("#display-services-categories-options").html(data);
            console.log(status)
        }
    });
}

<select class="form-control form-control-sm cate_name" id="display-services-categories-options">
</select>

$("body").on("click", "#service_cate_options", function () {
    var cate_id = $(this).attr("s_cate_id");
    $.ajax({
        url: "query.php",
        method: "POST",
        data: {getServicesReadyForUsingCategoriesBooking:1, cate_id:cate_id},
        success: function (data, status) {
            $("#display-services").html(data);
            console.log(status)
            // load_selected_service_cost();
        }
    });
});

$("select.cate_name").change(function () {
    var cate_id = $(this).children("option:selected").val();
    $.ajax({
        url: "query.php",
        method: "POST",
        data: {getServicesReadyForUsingCategoriesBooking:1, cate_id:cate_id},
        success: function (data, status) {
            $("#display-services").html(data);
            console.log(status)
            // load_selected_service_cost();
        }
    });
});

function fetch_services_based_on_selected_category(){
    include("includes/db.php");
    $output = "";
    $cate_id = mysqli_real_escape_string($con, $_POST["cate_id"]);

    $query = "SELECT * FROM `services` WHERE `cate_id`='".$cate_id."'";
    $run = $con->query($query);
    $output .= "<option>Select your choice of service</option>";
    if ($run->num_rows > 0) {
        while ($row = $run->fetch_array()) {
            $service_id = $row["id"];
            $service_name = $row["title"];
            $service_charge = $row["cost"];

            $output .= "<option id='service_options' **service_id**='".$service_id."'>".$service_name."</option>";
        }
    }else{
            $output .= "<option>We're currently out of services</option>";
        }
    return $output;
}

function fetch_services_based_on_selected_category(){
    include("includes/db.php");
    $output = "";
    $cate_id = mysqli_real_escape_string($con, $_POST["cate_id"]);

    $query = "SELECT * FROM `services` WHERE `cate_id`='".$cate_id."'";
    $run = $con->query($query);
    $output .= "<option>Select your choice of service</option>";
    if ($run->num_rows > 0) {
        while ($row = $run->fetch_array()) {
            $service_id = $row["id"];
            $service_name = $row["title"];
            $service_charge = $row["cost"];

            $output .= "<option id='service_options' **value**='".$service_id."'>".$service_name."</option>";
        }
    }else{
            $output .= "<option>We're currently out of services</option>";
        }
    return $output;
}