php - 使用 PHP 获取 mySQL 行项目 ID

Question

现在我有一个显示菜单项的表格，我希望管理员能够删除和编辑特定的行项目。如果我的 id 等于特定数字，我的 delete.php 代码可以正常工作，但我希望 id 等于删除按钮所在行的 id。所以我的问题是如何获取该 id 数字？因为我现在做的事情是不正确的。

这是我的delete.php 文件:

<?php 
$con = mysql_connect("localhost", "root", "");
if(!$con)
    {
    die('Could not connect: ' .mysql_error());
    }
mysql_select_db("bics_place", $con);

echo "mysql connected";

$myid = $_POST['id'];

$sql = "DELETE FROM menu WHERE id='$myid'";

echo "sql = $sql";

if(!mysql_query($sql, $con))
    {
    die('Error: ' .mysql_Error());
    }
echo "1 record deleted";
header("location:admin_menu.php");

mysql_close($con);

?>

这是在 admin_menu.php 中制作的表格

            $result = mysql_query("SELECT * FROM menu");

            echo "<table border='1' id='menu'>
            <form method='post' action='delete.php'>
            <tr>
            <th> Id </th>
            <th> Type </th>
            <th> Product Name </th>
            <th> Price </th>
            <th></th>
            <th></th>
            </tr>";


            while($row = mysql_fetch_assoc($result))
              {
              echo "<tr>";
              echo "<td>" . $row['id'] . "</td>";
              echo "<td>" . $row['type'] . "</td>";
              echo "<td>" . $row['productName'] . "</td>";
              echo "<td>" . $row['price'] . "</td>";
              echo "<td>" . '<input type="submit" name="delete" value="Delete">' . "</td>";
              echo "<td>" . '<input type="submit" name="edit" value="Edit">' . "</td>";
              echo "</tr>";
              }
            echo "</form>";
            echo "</table>";

Answer 1

在表单中获取隐藏字段。然后在提交之前将按钮 onclick 事件将 id 设置为隐藏字段。

<script>
function setId(idValue){
    document.getElementById('myid').value=idValue;
}
</script>
echo "<table border='1' id='menu'>
            <form method='post' action='delete.php'>
            <input type="hidden" name="id" id="myid" value="" />
            <tr>
            <th> Id </th>
            <th> Type </th>
            <th> Product Name </th>
            <th> Price </th>
            <th></th>
            <th></th>
            </tr>";


            while($row = mysql_fetch_assoc($result))
              {
              $myID = $row["id"];

              echo "<tr>";
              echo "<td>" . $row['id'] . "</td>";
              echo "<td>" . $row['type'] . "</td>";
              echo "<td>" . $row['productName'] . "</td>";
              echo "<td>" . $row['price'] . "</td>";
              echo "<td>" . '<input type="submit" name="delete" value="Delete" onClick="setId('.$myID.');">' . "</td>";
              echo "<td>" . '<input type="submit" name="edit" value="Edit">' . "</td>";
              echo "</tr>";
              }
            echo "</form>";
            echo "</table>";