Question

点击“删除位置”链接时，我无法从行程/数组中删除项目。

要删除的位置的值作为其唯一的“loc_id”传递到“remove_loc.php”文件中，并分配给新变量。执行此操作后，我尝试使用'unset（）'将其从会话数组中删除，但它似乎不起作用。

该位置的值肯定会被传递到'remove_loc.php'文件，因为我已经在另一端运行了一个echo语句以确保，并且我正在连接ok等db，所以我相信错误是在我的remove_loc.php文件中。

代码为itinerary.php（显示位置）。注意'删除位置'href链接：

<?php

session_start();

include ("includes/db.php");
include("functions/functions.php");
include("includes/head.html");
include("includes/search_box.html");
include("includes/left_sidebar.html");


//If user not already logged in then redirect to the login page
if (!isset($_SESSION['user_id'])){
    load_page();

    }//if

    //Display contents of itinerary
    if(!empty($_SESSION['itinerary'])){

        //Retrieve details of each location in array from database
        $query = "SELECT * FROM locations WHERE loc_id IN (";
        foreach ($_SESSION['itinerary'] as $loc_id=>$value)
        {$query.=$loc_id.',';}
        $query = substr($query, 0, -1).')ORDER BY loc_id ASC';
        $result = mysqli_query($db, $query);

    echo'<form action="itinerary.php" method="POST"><table><tr><th colspan="5">Locations in your itinerary<br></br></th></tr><tr>';

    //Display locations in array
    while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)){

        $loc_id = $row['loc_id'];

        echo"<tr><td>{$row['loc_name']}<br></br></td>
        <td>{$row['loc_desc']}</td>
        <td><a href=remove_loc.php?value=$loc_id>Remove location</a><br></br></td>
        ";
    }//while


    mysqli_close($db);

    }//if

    else {echo '<p>Your itinerary is empty.<br></br></p>';}

echo '<p>

<a href=submit.php?submit=$submission>Save itinerary</a><br></br>
<a href="user_details.php">Your details</a><br></br>
<a href="logout.php">Logout</a><br></br>
</p>';


?>

'remove_loc.php'的代码（用于从会话数组中删除位置）：

<?php

session_start();

include ("includes/db.php");
include("functions/functions.php");
include("includes/head.html");
include("includes/search_box.html");
include("includes/left_sidebar.html");

?>

<html>

<h1>REMOVE LOCATION</h1>
<br></br>

<?php

//If user not already logged in then redirect to the login page
if (!isset($_SESSION['user_id'])){
    load_page();

    }//if

//Assign ID of location which has been passed to new variable
if(isset($_GET['value']))
    $loc_id = $_GET['value'];
//Remove location from sess array?
if(isset($_SESSION['itinerary'][$loc_id])) unset($_SESSION['itinerary'][$loc_id]);
echo 'Removal successful!';

print_r($_SESSION);


?>

</html>

从会话数组中删除项目

0 个答案: