如何在PHP中取消設置會話數組

Question

我使用創建了一個會話數組

$_SESSION['create'] = array();

然后用這個填充數組

$_SESSION['create']['new-campaign-name']    = $_POST['new-campaign-name'];
$_SESSION['create']['new-campaign-type']    = $_POST['new-campaign-type'];
$_SESSION['create']['new-campaign-country'] = $_POST['new-campaign-country'];
$_SESSION['create']['new-campaign-list']    = $_POST['new-campaign-contact'];
$_SESSION['create']['new-campaign-des']     = $_POST['new-campaign-des'];

但我想刪除會話數組的所有內容。

我嘗試了這個

unset($_SESSION['create']);

但它似乎無法正常工作，並且所有值仍在會話數據上，是否有辦法重置會話數組的內容？

Answer 1

您將需要使用以下內置函數來執行此操作

session_unset();

在PHP.net上的session_unset

Answer 2

基本上，您想再次將會話的create部分設置為空。 您可以使用$_SESSION['create'] = array(); 再次進行初始化操作。

Answer 3

這是我使用您現有的會話變量運行的一些測試，包括我自己的一些變量。

請查閱整個腳本中的注釋。

<?php
session_start();
$_SESSION['create'] = array();

// this one can be used also
// $_SESSION=array();

/*
$_SESSION['create']['new-campaign-name']    = $_POST['new-campaign-name'];
$_SESSION['create']['new-campaign-type']    = $_POST['new-campaign-type'];
$_SESSION['create']['new-campaign-country'] = $_POST['new-campaign-country'];
$_SESSION['create']['new-campaign-list']    = $_POST['new-campaign-contact'];
$_SESSION['create']['new-campaign-des']     = $_POST['new-campaign-des'];

$_SESSION['create_2']['new-campaign-des_2']     = $_POST['new-campaign-des_2'];

*/

// my own test without POST variables
$_SESSION['create']['new-campaign-name']    = 'new-campaign-name';
$_SESSION['create']['new-campaign-type']    = 'new-campaign-type';
$_SESSION['create']['new-campaign-country'] = 'new-campaign-country';
$_SESSION['create']['new-campaign-list']    = 'new-campaign-contact';
$_SESSION['create']['new-campaign-des']     = 'new-campaign-des';

$_SESSION['create_2']['new-campaign-des_2']     = 'new-campaign-des_2';

// echo "Session variables above this";

echo $_SESSION['create']; // this will echo Array

echo "<br>";

// this will unset all in $_SESSION['create'] group
unset($_SESSION['create']);

echo "<br>";

var_dump($_SESSION);

echo "<hr>";

// this will echo NULL
var_dump($_SESSION['create']);

echo "<hr>";

// this will echo Array even after unsetting $_SESSION['create']
echo $_SESSION['create_2'];

echo "<hr>";

// this will echo/dump
// array(1) { ["new-campaign-des_2"]=> string(18) "new-campaign-des_2" } 
var_dump($_SESSION['create_2']);

echo "<hr>";

// this will echo/dump
// array(1) { ["create_2"]=> array(1) { ["new-campaign-des_2"]=> string(18) "new-campaign-des_2" } }
// but not anything in the ['create'] group
var_dump($_SESSION);