Question

我从特定列车编号的车站的数据库值创建了一个下拉列表。当我从下拉列表中选择两个电台时，我想显示特定列车编号的两个选定电台之间的电台列表，但我无法这样做。我用它来在两个电台之间进行选择，但它没有给出结果。

<?php
include "config.php"; // Database connection using PDO
if(isset($_POST['submit'])){
        $tnumber=$_POST['tnumber'];
$sql="select sname from traininfo where tnumber = '".$tnumber."' ORDER by day, arrival ASC ";
echo $sql;
}
/* You can add order by clause to the sql statement if the names are to be displayed in alphabetical order */
?>
 <form action="#" method="post">
 <?php

echo "<select name='to'>
<option value=''>Station Name</option>"; // list box select command

foreach ($dbo->query($sql) as $row){//Array or records stored in $row

echo "<option value=$row[sname]>$row[sname]</option>"; 

/* Option values are added by looping through the array */ 

}

 echo "</select>";// Closing of list box


 echo "<select name='from'>
<option value=''>Station Name</option>"; // list box select command

foreach ($dbo->query($sql) as $row){//Array or records stored in $row

echo "<option value=$row[sname]>$row[sname]</option>"; 

/* Option values are added by looping through the array */ 

}

 echo "</select>";// Closing of list box

 ?> 



<input type="submit" name="next" value="Get Selected Values" />
</form>

<?php
include "config.php"; 
if(isset($_POST['next'])){
$selected_val = $_POST['to']; 
$selected_val2 = $_POST['from']; // Storing Selected Value In Variable
echo "You slept at :" .$selected_val; 
 // Displaying Selected Value
echo "You wake up at:" .$selected_val2;  // Displaying Selected Value


    $sql5 = "SELECT (sname, tname, tnumber, arrival, depart, day) FROM stations WHERE sname BETWEEN sname='$selected_val' and sname='$selected_val2' ORDER BY day, arrival ASC";
    echo $sql5;
    $q5=mysql_query($sql5);
}   
else
    {
        $sql5="SELECT * FROM stations";
        echo $sql5;
    $q5=mysql_query($sql5);
    }





?>
<html>
<body>


<table>

    <?php
   while($res=mysql_fetch_array($q5)){
    ?>
     <tr>
            <th>id</th><br>

            <th>Station Name</th><br>

            <th>Train name</th><br>

            <th>Train Number</th><br>

            <th>Arrival</th><br>

            <th>Departure</th><br>
            <th>Day</th>
    </tr>
    <tr>
        <td><?php echo $res['id'];?></td>
        <td><?php echo $res['sname'];?></td>
        <td><?php echo $res['tname'];?></td>
        <td><?php echo $res['tnumber'];?></td>
        <td><?php echo $res['arrival'];?></td>
        <td><?php echo $res['depart'];?></td>
        <td><?php echo $res['day'];?></td>
    </tr>

    <?php }
?> 
</table>
</body>
</html>

我想从下拉列表中选择两个站之间的列车，但我无法这样做

0 个答案: