Question

我正在尝试根据它的ID从数据库中删除一行。用户应该能够单击删除按钮，并且该行中的所有内容都应该被删除 - 根据我在下面的代码，它有点工作，但它会从表中删除所有行，而不是仅删除基于ID。

我感谢您看到的任何代码可能不是最佳实践，但这只是在个人项目的基本测试阶段，以便我更好地学习PHP。

我做错了什么？

try {
    $results = $db->query("SELECT * FROM property_details ORDER BY id ASC");
} catch (Exception $e) {
    echo "Data could not be retrieved from the database.";
    exit;
}

$property = $results->fetchAll(PDO::FETCH_ASSOC); 


echo '<form method="post">';
echo '<table><th> Property Name </th><th> Description </th><th> Host Name </th><th> Location </th><th> Price </th>';
foreach ($property as $property_details) {
$id = $property_details['id'];
    echo '<tr>';
    echo '<td>';
    echo $property_details['property_name'] . '<br />';
    echo '</td>';
    echo '<td>';
    echo $property_details['property_description'] . '<br />';
    echo '</td>';
    echo '<td>';
    echo $property_details['host_name'] . '<br />';
    echo '</td>';
    echo '<td>';
    echo $property_details['location'] . '<br />';
    echo '</td>';
    echo '<td>';
    echo "&#163;" . $property_details['price'] . " per night";
    echo '</td>';
    echo '<td>';
    echo '<input type="submit" name="deleteItem" value="DELETE ID '.$id.'" />';
    echo '</td></tr>';

    if(isset($_POST['deleteItem'])) {
    try {
            $results = $db->prepare("DELETE FROM 
                                property_details
                        WHERE
                    id = :theid
                        ");
        $results->bindParam(':theid', $id);
        $results->execute();
        } 

    catch (Exception $e) {
            echo "Could not insert data in to the database";
    }   
    }
    } 

echo '</table>';
echo '</form>';

Answer 1

整理处理的粗略方式。

这将获取deleteItem的calue，根据空间将其展开，并使用第3项作为要删除的项目的ID： -

<?php


if(isset($_POST['deleteItem'])) 
{
    list($filler, $filler2, $id_to_delete) = explode(' ', $_POST['deleteItem']);
    if (is_numeric($id_to_delete))
    {
        try 
        {
            $results = $db->prepare("DELETE FROM 
                                        property_details
                                        WHERE
                                        id = :theid
                                        ");
            $results->bindParam(':theid', (int)$id_to_delete);
            $results->execute();
        } 

        catch (Exception $e) 
        {
            echo "Could not delete data from the database";
        } 
    }   
}

try 
{
    $results = $db->query("SELECT id, property_name, property_description, host_name, location, price FROM property_details ORDER BY id ASC");
} catch (Exception $e) 
{
    echo "Data could not be retrieved from the database.";
    exit;
}

$property = $results->fetchAll(PDO::FETCH_ASSOC); 

echo '<form method="post">';
echo '<table><th> Property Name </th><th> Description </th><th> Host Name </th><th> Location </th><th> Price </th>';
foreach ($property as $property_details) 
{
    $id = $property_details['id'];
    echo '<tr>';
    echo '<td>';
    echo $property_details['property_name'] . '<br />';
    echo '</td>';
    echo '<td>';
    echo $property_details['property_description'] . '<br />';
    echo '</td>';
    echo '<td>';
    echo $property_details['host_name'] . '<br />';
    echo '</td>';
    echo '<td>';
    echo $property_details['location'] . '<br />';
    echo '</td>';
    echo '<td>';
    echo "&#163;" . $property_details['price'] . " per night";
    echo '</td>';
    echo '<td>';
    echo '<input type="submit" name="deleteItem" value="DELETE ID '.$id.'" />';
    echo '</td></tr>';
}
echo '</table>';
echo '</form>';

?>

可能应该检查第三部分是否是要删除的有效项目（即有效身份证）

从数据库中删除单行

1 个答案: