我想根据从下拉列表中选择的内容显示数据库中的数据。例如，如果我选择tbl3并单击“提交”，则必须显示包含tbl3的所有数据。
期待一个合适的答案。谢谢大家！
这是我的代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<body>
<?php
error_reporting(0);
include("../connection/connection.php");
//
if(!isset($_SESSION['u']))
{
header("location../resto/index.php");
//$cust_id=!isset($_GET['cust_id'])?0:$_GET['cust_id'];
?>
<form method="post" action="">
<p>Table No.
<select id="cust" name ="cust">
<?php
$query1 = mysql_query("SELECT table_num, item, price, ca_id FROM tblcash WHERE status='FINISHED' GROUP BY table_num");
$sid=!isset($_GET['id'])?0:$_GET['id'];
while($row = mysql_fetch_array($query1)){
$ca_id = $row['ca_id'];
$lamesa = $row['table_num'];
if($_GET['id']==$row['ca_id']){
echo "<option value=\"$ca_id\" selected>$lamesa</option>";
}
else{
echo "<option value=\"$ca_id\">$lamesa</option>";
}
}
?>
</select>
<input type="submit" name="select_cust" />
</p>
<p>
<?php
if(isset($_GET['id']))
{
$result = mysql_query("SELECT table_num, item, price FROM tblcash WHERE table_num=$sid AND status='FINISHED' ") or die(mysql_error());
echo "<table width='400' border='1' align='center'>";
echo "<tr>";
//echo "<td>Code</td>";
echo "<td align='center' style='font-size:20px;'>Tbl #</td>";
echo "<td align='center' style='font-size:20px;'>Item</td>";
echo "<td align='center' style='font-size:20px;'>Price</td>";
echo "<tr>";
while ($row=mysql_fetch_array($result))
{
echo "<tr>";
echo "<td>" .$row['table_num'];
echo "<td>" .$row['item'];
echo "<td>" .$row['price'];
echo "<tr>";
}
echo "</table>";
}
}
?>
</p>
<br />
<?php
if(isset($_GET['id'])){
$query3 = mysql_query("SELECT SUM(price) FROM tblcash WHERE table_num=$sid AND status='FINISHED' GROUP BY table_num ");
$price = mysql_fetch_array($query3);
$price = round($price[0],2);
echo "<div style=\"margin:0 auto;width:50%\" ><h2>TOTAL PRICE IS:$price</h2></div>";
}
?>
<br />
<br />
<?php if(isset($_GET['id'])){ ?>
</p>
<div style="margin:0 auto;width:50%" ><input type="submit" name="save" value="SAVE" /></div>
<?php } ?>
</form>
</body>
</html>
<?php
if(isset($_POST['select_cust'])){
$selected = $_POST['cust'];
header("location:counter2.php?id=$selected");
}
?>
<?php
if(isset($_POST['save'])){
$customer_id = $_GET['id'];
$query4 = mysql_query("SELECT COUNT(*) FROM tblcash WHERE table_num=$customer_id AND status='FINISHED' GROUP BY table_num") or die(mysql_error());
if(mysql_num_rows($query4)>0){
$message ='';
$test_pending=mysql_query("SELECT COUNT(*) FROM tblcash WHERE table_num=$customer_id AND status='PENDING' GROUP BY table_id");
if(mysql_num_rows($test_pending)>0){
$message =' But there are dishes that are not yet cooked.';
}
$query11 = mysql_query("SELECT SUM(price) FROM tblcash WHERE table_num=$customer_id AND status='FINISHED' GROUP BY table_num") or die(mysql_error());
$price1 = mysql_fetch_array($query11);
$price1 = round($price1[0],2);
$query_delete = mysql_query("DELETE FROM tblcash WHERE table_num=$customer_id AND status='FINISHED'") or die(mysql_error());
if($query_delete){
$query_get_name = mysql_query("SELECT * from tblcustomer WHERE table_num=$customer_id") or die(mysql_error());
$row = mysql_fetch_array($query_get_name);
$tbl_name = $row['table_num'];
$query_ins = mysql_query("INSERT INTO tblcashtrans(ca_id,table_num,total_price) VALUES ($ca_id,'$tbl_name',$price1)") or die(mysql_error());
if($query_ins){
echo "<script>
alert(\"Successfully saved items.$message\");
window.location='cash2.php';
</script>";
}
else{
echo '<script>
alert("Unsuccessfully saved items")
window.location="cash2.php";
</script>';
}
}
else{
echo '<script>
alert("Unsuccessfully saved items")
window.location="cash2.php";
</script>';
}
}
else{
echo '<script>
alert("No Item to be saved")
window.location="cash2.php";
</script>';
}
}
?>