如何从 PHP 会话数组中删除变量 [英] How to remove a variable from a PHP session array

问题描述

我有用于向会话添加变量的 PHP 代码:

<预><?php print_r($_SESSION);?>

<form name="input" action="index.php?name=<?php echo $list ?>"方法=发布"><input type="submit" name="add"value="Add"/></表单><form name="input" action="index.php?name=<?php echo $list2 ?>"方法=发布"><input type="submit" name="remove" value="Remove"/></表单>

当用户选择删除"时，我想从会话数组中删除 $list2 中显示的变量.

但是当我取消设置时，数组中的所有变量都会被删除.

如何只删除一个变量?

解决方案

if (isset($_POST['remove'])) {$key=array_search($_GET['name'],$_SESSION['name']);如果($key！==false)未设置($_SESSION['name'][$key])；$_SESSION["name"] = array_values($_SESSION["name"]);}

由于$_SESSION['name']是一个数组，所以需要找到指向你感兴趣的name值的数组key.最后一行重新排列数组的索引供下次使用.

I have PHP code that is used to add variables to a session:

<?php
    session_start();
    if(isset($_GET['name']))
    {
        $name = isset($_SESSION['name']) ? $_SESSION['name'] : array();
        $name[] = $_GET['name'];
        $_SESSION['name'] = $name;
    }
    if (isset($_POST['remove']))
    {
        unset($_SESSION['name']);
    }
?>
<pre>  <?php print_r($_SESSION); ?>  </pre>

<form name="input" action="index.php?name=<?php echo $list ?>" method="post">
  <input type="submit" name ="add"value="Add" />
</form>

<form name="input" action="index.php?name=<?php echo $list2 ?>" method="post">
  <input type="submit" name="remove" value="Remove" />
</form>

I want to remove the variable that is shown in $list2 from the session array when the user chooses 'Remove'.

But when I unset, ALL the variables in the array are deleted.

How I can delete just one variable?

解决方案

if (isset($_POST['remove'])) {
    $key=array_search($_GET['name'],$_SESSION['name']);
    if($key!==false)
    unset($_SESSION['name'][$key]);
    $_SESSION["name"] = array_values($_SESSION["name"]);
} 

Since $_SESSION['name'] is an array, you need to find the array key that points at the name value you're interested in. The last line rearranges the index of the array for the next use.

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