我试图在$ _Session [deptselect]中保存一个变量，并在另一个页面中调用它，但对声明它的位置感到困惑。当我回显$ _Session [deptselect]时，它为空白。
我已经在表格内或表格下方的多个位置尝试过，但似乎没有任何效果。我想将其从约会发送到约会2，但约会2似乎没有获取变量。
我已经尝试过使用$ _post [deptselect]在第二页中获取该值，然后在那儿获取它，但是一旦我在第二页中按Submit，它就会消失。
appointment.php
<?php
include("dbconnection.php");
session_start();
if(!isset($_SESSION['username'])) {
die("Please login");
}
$_SESSION['deptselect']=$_POST['deptselect'];
?>
<form class="" action="appointment2.php" method="post">
<fieldset>
<legend>Appointment</legend>
<label>Select Department</label>
<select class="" name="deptselect" required>
<option ></option>
<?php
$deptsql=mysqli_query($con,"select deptname,deptid from department where status='1'");
while ($row = mysqli_fetch_assoc($deptsql))
{
echo "<option id='deptselect' value='" . $row['deptid'] ."'>" . $row['deptname'] ."</option>";
}
?>
</select>
</fieldset>
<input type="submit" name="submit" value="Submit">
</form>
<?php
include("footer.php");
?>
appointment2.php
<?php
session_start();
if(!isset($_SESSION['username']))
{
include('footer.php');
die("Please login");
}
if(!empty($_POST)){
include("dbconnection.php");
$dept=$_SESSION['deptselect'];
echo $dept;
$daate=$_POST['date'];
$doc = $_POST['doc'];
$tiime=$_POST['time'];
$user=$_SESSION['username'];
$pd="SELECT * from patient where name='$user'";
$pid=mysqli_query($con,$pd);
while($row = mysqli_fetch_assoc($pid)){
$piid=$row['pid'];
}
$query="insert into appointment (deptid, docempid,pid,apptime,appdate) VALUES ('$dept','$doc','$piid','$tiime','$daate') " ;
//$res=mysqli_query($con,$query);
// echo "$query";
//echo "$dept";
}
?>
<body>
<form class="" action="appointment2.php" method="post">
<label>Select doctor</label>
<select class="" name="doc" >
<option ></option>
<?php
$dee=$_POST['deptselect'];
$_SESSION['id']=$dee;
$sql="SELECT * FROM doctor where deptid='$dee'";
$docsql= mysqli_query($con,$sql);
while ($row = mysqli_fetch_assoc($docsql))
{
echo "<option value='" . $row['docempid'] ."'>" . $row['name'] ."</option>";
}
?>
</select>
<br><br><br>
<label>Enter Time</label>
<input type="time" name="time" placeholder="enter time" >
<br><br><br>
<label>Enter date</label>
<input type="date" name="date" placeholder="enter date" >
<br> <br>
<input type="submit" name="submit" value="Submit">
</form>
</body>
<?php include("footer.php");
?>
我希望在pointing2.php中使用$ _session [deptselect]，以便我可以运行命令insert，因为我对js的了解为零，所以不可能执行依赖列表。 TIA
最佳答案
在第一个脚本的开头，您有：
if(!isset($_SESSION['username'])) {
die("Please login");
}
在第二个开始时：
if(!isset($_SESSION['username']))
{
include('footer.php');
die("Please login");
}
如果未设置
$_SESSION['username']，则两者都会立即停止。那么，如果从未执行您的正文代码，应该如何设置
$_SESSION['username']？