Question

我有两个PHP文件：itemTransaction.php和recordItemTransaction.php。我可以从itemTransaction中的表中选择要为其记录交易的行，它链接到recordItemTransaction.php中数据库中的正确行，从而生成一个表格，允许我编辑itemQuantity。我有一个表单，其中包含一个隐藏的ID字段和一个文本框，供用户输入更新的itemQuantity，并将在提交后将其提交到数据库。我想向用户显示当前itemQuantity，因此当他们编辑itemQuantity时，他们会在编辑并记录交易之前知道当前数量。

我的问题是在recordItemTransaction.php中，我无法弄清楚如何在同一文件中同时提取ID和itemQuantity的值。这链接到recordItemTransaction.php。由于我在这里引用ID，因此可以在下一个文件中检索它。但是我无法连同ID一起检索itemQuantity。只有一个。所以，当我切换到... ...我可以在文本框中检索itemQuantity值，但是在提交表单时，它无法确定要更新的行。

itemTransaction.php

    $query = "SELECT * FROM `Items` WHERE `isActive` = 'Active'";
    $result = mysqli_query($con, $query);

        echo "<h1>Record Transaction | Items</h1>";

        echo "<a href='../inventoryIndex.php'><button class='button'>Back</button></a>";

    //Display Data
    echo "<table class='applyFont' cellspacing='0' cellpadding='0'>";
        echo "<tr>";
            echo "<th></th>";
            echo "<th>ITEM</th>";
            echo "<th>COST</th>";
            echo "<th>RECORD TRANSACTION</th>";
        echo "</tr>";

    while($row=mysqli_fetch_array($result)) {
        echo "<tr>";
            echo "<td align='center' width='9%'><img src='/InventoryManager/InventoryManagerImages/Items/{$row['itemImage']}' width='115' height='125' style='display:block'></td>";
            echo "<td align='center' width='30%'>{$row['description']}</td>";
            echo "<td align='center' width='30%'>$ {$row['unitCost']}</td>";
            echo "<td align='center'><a href='recordItemTransaction.php?ID={$row['ID']}'><img src='/InventoryManager/InventoryManagerImages/Icons/couple-of-arrows-changing-places.png' title='Record an update to inventory'></td>";
        echo "</tr>";
    }
    ?>
</body>
</html>

recordItemTransaction.php

> >

<?php
    if(isset($_POST['updateQuantity'])) {
    //Connect to DB
    $hostname = "******";
    $username = "******";
    $password = "******";
    $dbName = "******";

    $con = mysqli_connect($hostname, $username, $password, $dbName);

    //Get Value From User
    $itemQuantity = $_POST["itemQuantity"];
    $ID = $_POST["ID"];

    //Query to Update Data
    $query = "UPDATE `Items` SET `itemQuantity`='$itemQuantity' WHERE ID='$ID'";
    $result = mysqli_query($con, $query);

    //Check if Query Was Successful
    if($result) {
        echo "<p style=font-family:'Roboto Condensed', sans-serif>Item quantity has been updated</p>";
    } else {;
        echo "<p style=font-family:'Roboto Condensed', sans-serif>Error updating the quantity of the item.</p>" . mysqli_error();
    }   
    //Disconnect From DB
    mysqli_close($con);
    }
    ?>
<body>
</body>
</html>

如何从MySQL数据库按ID提取字段数据？

0 个答案: