Question

所以我有这个PHP应用程序，您可以在其中创建任务并删除它们。问题是当我有多个任务时，所有删除任务链接将删除最新任务而不是您尝试删除的任务。例如，最新任务的id = 25。我想删除id = 18的任务，但是在单击删除链接时，它会删除id = 18的任务。

以下是任务视图的代码：

while($row = $stmt->fetch(PDO::FETCH_ASSOC))
{                                                       
    $id = $_SESSION['id'] = $row['id'];
    $_SESSION['task'] = $row['task'];
    $_SESSION['startdate'] = $row['startdate'];
    $_SESSION['enddate'] = $row['enddate'];

    //convert session startdate to a php date object
    $startdate = new DateTime($_SESSION['startdate']);
    $enddate = new DateTime($_SESSION['enddate']);

    //echo task properties in a table
    print "<div class='task'>";
    print "<p><a href='editview.php?id=$id'>Edit Task</a> | <a href='delete.php?id=$id'>Delete Task</a></p>";
    print "<p>Start Date: ".$startdate->format('d M Y')."</p>";
    print "<p>Date to Complete By: ".$enddate->format('d M Y')."</p>";
    print "<p>".$_SESSION['task']."</p>";
    print "</div>";
}

以下是调用的删除函数（这也适用于editview函数，但它们都是同一个问题）：

session_start();
    //remove task from tasks table 
    $query="DELETE FROM tasks WHERE id=?";
    //assign task id to variable id
    $id = $_SESSION['id'];
    try
    {   
        //prepare the query
        $stmt = $dbh->prepare($query);  
        //bind the id table value to the variable id
        $stmt->bindParam(1,$id);

        $stmt->execute();
    }

Answer 1

你有一个链接：

<a href='delete.php?id=$id'>

所以要获取您从$_GET而非$_SESSION

获取的ID

$query="DELETE FROM tasks WHERE id=?";
//assign task id to variable id
$id = $_GET['id'];

并且避免循环中的Sessions，这不是必需的：

while($row = $stmt->fetch(PDO::FETCH_ASSOC))
{       
    $id = $row['id'];

    //convert session startdate to a php date object
    $startdate = new DateTime($row['startdate']);
    $enddate = new DateTime($row['enddate']);

    //echo task properties in a table
    print "<div class='task'>";
    print "<p><a href='editview.php?id=$id'>Edit Task</a> | <a href='delete.php?id=$id'>Delete Task</a></p>";
    print "<p>Start Date: ".$startdate->format('d M Y')."</p>";
    print "<p>Date to Complete By: ".$enddate->format('d M Y')."</p>";
    print "<p>".$row['task']."</p>";
    print "</div>";
}

Answer 2

我认为你没有正确绑定参数，请尝试

session_start();
    //remove task from tasks table 
    $query="DELETE FROM tasks WHERE id=:id";
    //assign task id to variable id
    $id = $_SESSION['id'];
    try
    {   
        //prepare the query
        $stmt = $dbh->prepare($query);  
        //bind the id table value to the variable id
        $stmt->bindParam(:id,$id,PDO::PARAM_INT);
        $stmt->execute();
    }

无法删除特定条目PHP

2 个答案: