我一直在作为个人练习的一部分进行测试和玩耍，但是，我陷入了以下要通过JavaScript添加项目列表的问题，提交后，我想验证然后存储添加的内容清单。但是，一旦提交，我将得到一个错误的Unidentified索引，好像该值未按isset函数检查的那样提交，并且始终返回空值。在进一步查看StackOverflow之后，我注意到有些引用HTML结构。因此，我将HTML最小化为如下所示：
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="assets/vendor/bootstrap/css/bootstrap.min.css">
<link href="assets/vendor/fonts/circular-std/style.css" rel="stylesheet">
<link rel="stylesheet" href="assets/libs/css/customeStyle.css">
<link rel="stylesheet" href="assets/libs/css/style.css">
<link rel="stylesheet" href="assets/vendor/fonts/fontawesome/css/fontawesome-all.css">
<title>Concept - Bootstrap 4 Admin Dashboard Template</title>
</head>
<body>
<!-- ============================================================== -->
<!-- main wrapper -->
<!-- ============================================================== -->
<?php //include("navBar.php"); ?>
<!-- ============================================================== -->
<!-- left sidebar -->
<!-- ============================================================== -->
<?php //include("SlideBar.php"); ?>
<!-- ============================================================== -->
<!-- end left sidebar -->
<!-- ============================================================== -->
<!-- ============================================================== -->
<?php
if(isset($_POST["submit"])){
//$test = $_POST["patName"];
if(isset($_POST["medAdded0"])){
//echo $value;
$listName= $_POST["medAdded0"];
echo '<script language="javascript">';
echo 'alert("'.$listName.'")';
echo '</script>';
echo $listName;
}else {
//echo $value;
echo '<script language="javascript">';
echo 'alert("still empty")';
echo '</script>';
echo $_POST["medAdded0"];
}
}
?>
<form action="#" method="POST">
<div class="row">
<div class="col-xl-8 col-lg-8 col-md-8 col-sm-12 col-12">
<div id="medListContainer" class="form-group">
</div>
</div>
</div>
<div class="col-lg-4">
<div class="card">
<h5 class="card-header">List of Medication</h5>
<div class="card-body">
<div class="list-group" id="pillsList">
<button class="list-group-item list-group-item-action" value="noor">Dapibus ac facilisis in</button>
<button class="list-group-item list-group-item-action" value="btn2">Morbi leo risus</button>
<button class="list-group-item list-group-item-action" value="btn3">Porta ac consectetur ac</button>
</div>
</div>
</div>
</div>
<input class="btn btn-success" type="submit" name="submit" value="Save">
</form>
<!-- Optional JavaScript -->
<!-- jquery 3.3.1 -->
<script src="assets/vendor/jquery/jquery-3.3.1.min.js"></script>
<!-- bootstap bundle js -->
<script src="assets/vendor/bootstrap/js/bootstrap.bundle.js"></script>
<!-- slimscroll js -->
<script src="assets/vendor/slimscroll/jquery.slimscroll.js"></script>
<!-- main js -->
<script src="assets/libs/js/main-js.js"></script>
<script>
var indexCounter=0;
$('#pillsList').on('click', function (e) {
e.preventDefault();
var targetList = document.getElementById("medListContainer");
var medValue= e.target.value;
if (indexCounter==10) {
//code
alert("you've exceeded your limit, please generate new ");
}else{
addMedList(medValue,targetList);
}
});
function addMedList(BtnValue,targetList) {
//function to place the list of selected medicaition
var btn = document.createElement("INPUT");
btn.innerHTML= BtnValue;
btn.className = "list-group-item list-group-item-action";
btn.setAttribute("value", BtnValue);
btn.setAttribute("id", 'medAdded' + indexCounter);
btn.setAttribute("name", 'medAdded' + indexCounter);
indexCounter++;
btn.setAttribute("type", "button");
targetList.appendChild(btn);
}
</script>
</body>
</html>
答案 0 :(得分：0)
将其替换并重试
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="assets/vendor/bootstrap/css/bootstrap.min.css">
<link href="assets/vendor/fonts/circular-std/style.css" rel="stylesheet">
<link rel="stylesheet" href="assets/libs/css/customeStyle.css">
<link rel="stylesheet" href="assets/libs/css/style.css">
<link rel="stylesheet" href="assets/vendor/fonts/fontawesome/css/fontawesome-all.css">
<title>Concept - Bootstrap 4 Admin Dashboard Template</title>
</head>
<body>
<!-- ============================================================== -->
<!-- main wrapper -->
<!-- ============================================================== -->
<?php //include("navBar.php"); ?>
<!-- ============================================================== -->
<!-- left sidebar -->
<!-- ============================================================== -->
<?php //include("SlideBar.php"); ?>
<!-- ============================================================== -->
<!-- end left sidebar -->
<!-- ============================================================== -->
<!-- ============================================================== -->
<?php
if(isset($_POST["submit"])){
//$test = $_POST["patName"];
if(isset($_POST["medAdded0"])){
//echo $value;
$listName= $_POST["medAdded0"];
echo '<script language="javascript">';
echo 'alert("'.$listName.'")';
echo '</script>';
echo $listName;
}else {
//echo $value;
echo '<script language="javascript">';
echo 'alert("still empty")';
echo '</script>';
}
}
?>
<form action="#" method="POST">
<div class="row">
<div class="col-xl-8 col-lg-8 col-md-8 col-sm-12 col-12">
<div id="medListContainer" class="form-group">
</div>
</div>
</div>
<div class="col-lg-4">
<div class="card">
<h5 class="card-header">List of Medication</h5>
<div class="card-body">
<div class="list-group" id="pillsList">
<button class="list-group-item list-group-item-action" value="noor">Dapibus ac facilisis in</button>
<button class="list-group-item list-group-item-action" value="btn2">Morbi leo risus</button>
<button class="list-group-item list-group-item-action" value="btn3">Porta ac consectetur ac</button>
</div>
</div>
</div>
</div>
<input class="btn btn-success" type="submit" name="submit" value="Save">
</form>
<!-- Optional JavaScript -->
<!-- jquery 3.3.1 -->
<script src="assets/vendor/jquery/jquery-3.3.1.min.js"></script>
<!-- bootstap bundle js -->
<script src="assets/vendor/bootstrap/js/bootstrap.bundle.js"></script>
<!-- slimscroll js -->
<script src="assets/vendor/slimscroll/jquery.slimscroll.js"></script>
<!-- main js -->
<script src="assets/libs/js/main-js.js"></script>
<script>
var indexCounter=0;
$('.list-group-item').on('click', function (e) {
e.preventDefault();
var targetList = document.getElementById("medListContainer");
var medValue= $(this).val();
if (indexCounter==10) {
//code
alert("you've exceeded your limit, please generate new ");
}else{
addMedList(medValue,targetList);
}
});
function addMedList(BtnValue,targetList) {
//function to place the list of selected medicaition
var btn = document.createElement("INPUT");
btn.innerHTML= BtnValue;
btn.className = "list-group-item list-group-item-action";
btn.setAttribute("value", BtnValue);
btn.setAttribute("id", 'medAdded' + indexCounter);
btn.setAttribute("name", 'medAdded' + indexCounter);
indexCounter++;
btn.setAttribute("type", "button");
targetList.appendChild(btn);
}
</script>
</body>
</html>
答案 1 :(得分：0)
您写了：
if(isset($_POST["medAdded0"])){
//echo $value;
$listName= $_POST["medAdded0"];
echo '<script language="javascript">';
echo 'alert("'.$listName.'")';
echo '</script>';
echo $listName;
}else {
//echo $value;
echo '<script language="javascript">';
echo 'alert("still empty")';
echo '</script>';
echo $_POST["medAdded0"];
}
未设置else时执行$_POST["medAdded0"]块。因此尝试在此处回显是没有意义的。摆脱困境
echo $_POST["medAdded0"];