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我正在尝试在单击提交按钮时更新“Cart_View02”表。我这个学期是 php 和 sql 的新手。有人知道我在做什么错吗？

<?PHP
 if (isset($_GET['tab'])) $table= $_GET['tab'];
 else $table="Cart_view02";
$reset = true;
$errmsg = array("","");
//1. Make a connection to the database
$dbconn = mysqli_connect("localhost","root","","mydatabase1") 
      or die(mysqli_connect_error());
if($_SERVER['REQUEST_METHOD']=='POST'){
    $action = $_POST['action']; 
    $qty = $_POST['txtqty'];
    $crtnum = $_POST[100];
    $itemid = $_POST[$row[0]];
        if($action == "select"){
        $sql = "INSERT INTO cart_lineitems VALUES ($crtnum, '$itemid',
'$qty');";
        $result = mysqli_query($db,$sql) or die(mysql_error($db));
        }
//print_r($_POST);
header("location: cartdump.php");
}
?>

<!DOCTYPE html>
<html>
<head><title>Order Page</title>
<link href="css/styles.css" type="text/css" rel="stylesheet" />
<script type="text/javascript">
</script>

<img class="banner" src="Images/acme_banner.jpg" alt="Acme Spook Shoppe"/>

</head>
<body> 
<br><br> 
<a href= "home.php">Home</a>

<form name="form1" method='POST'>
<?php
if (isset($_GET['prod'])) $prod=$_GET['prod'];
else $prod = "arm01";
//echo $prod;   //<------To print results



$sql = "select productid,name,imagefile, "
    ."shortdescription, longdescription,"
    ."unitprice "
    ."from products "
    ."where productid='$prod'";
    echo "<br>";
//echo $sql;    //<------To print results

//2. Run a query against the database
$result = mysqli_query($dbconn,$sql) 
    or die(mysqli_error($dbconn));

    //print_r($result); //<------To print results

//3. Return the results
    echo "<table class=ordertable >";
while ($row = mysqli_fetch_array($result))
{
    echo "<tr>";
    echo "<td>$row[1]<br><br>";
    echo "$row[3]<br><br>";
    echo "$row[4]<br><br>";
    echo "Price: $row[5]<br><br>";
    echo "<input type='text' name='txtqty' value='1' size=2 maxlength=2>";
    echo "<input type='submit' name='btnadd' value='Add To Cart'
OnClick='SubmitForm'>";
    echo "</td>";
    echo "<td><img src='images/products/$row[2]' "
     ."height=300px width =250px></td>";
    echo "</tr>";
    echo "</table>";

//print_r($row);
}
//4. Release the resources
mysqli_free_result($result);
//5. Close the connection
mysqli_close($dbconn);
?>



</form>
</body>
</html>

对此的任何帮助将不胜感激。

4

1 回答 1

0

这就是我最终的结果：

<!DOCTYPE html>

<?PHP
print_r($_POST);
if (isset($_GET['prod'])) $prod=$_GET['prod'];
else $prod = "arm01";
 //if (isset($_GET['tab'])) $table= $_GET['tab'];
// else $table="Cart_view02";
//$reset = true;
//$errmsg = array("","");
//1. Make a connection to the database
$dbconn = mysqli_connect("localhost","root","","mydatabase1") 
      or die(mysqli_connect_error());
if($_SERVER['REQUEST_METHOD']=='POST'){

    $qty = $_POST['txtqty'];
    $crtnum = 100;
    if (preg_match("/^[0-9]{1,2}$/",$qty)){
        $sql = "INSERT INTO cart_lineitems VALUES ($crtnum, '$prod', $qty);";
        $result = mysqli_query($dbconn,$sql) or die(mysqli_error($dbconn));

        //echo"<br>$sql";
         header("location: cartdump.php");
    }
    else echo "Quantity is not valid<br>";
}
?>


<html>
<head><title>Order Page</title>
<link href="css/styles.css" type="text/css" rel="stylesheet" />
<script type="text/javascript">
</script>

<img class="banner" src="Images/acme_banner.jpg" alt="Acme Spook Shoppe"/>

</head>
<body> 
<br><br> 
<a href= "home.php">Home</a>

<form name="form1" method='POST'>
<?php

//echo $prod;   //<------To print results



$sql = "select productid,name,imagefile, "
    ."shortdescription, longdescription,"
    ."unitprice "
    ."from products "
    ."where productid='$prod'";
    echo "<br>";
//echo $sql;    //<------To print results

//2. Run a query against the database
$result = mysqli_query($dbconn,$sql) 
    or die(mysqli_error($dbconn));

    //print_r($result); //<------To print results

//3. Return the results
    echo "<table class=ordertable >";
while ($row = mysqli_fetch_array($result))
{
    echo "<tr>";
    echo "<td>$row[1]<br><br>";
    echo "$row[3]<br><br>";
    echo "$row[4]<br><br>";
    echo "Price: $row[5]<br><br>";
    echo "<input type='text' name='txtqty' value='1' size=2 maxlength=2>";
    echo "<input type='submit' name='btnadd' value='Add To Cart' OnClick='SubmitForm'>";
    echo "</td>";
    echo "<td><img src='images/products/$row[2]' "
     ."height=300px width =250px></td>";
    echo "</tr>";
    echo "</table>";

//print_r($row);
}
//4. Release the resources
mysqli_free_result($result);
//5. Close the connection
mysqli_close($dbconn);
?>



</form>
</body>
</html>
于 2015-10-16T05:49:21.037 回答