如何将我的$ _POST变量永久保存在$ _SESSION中？

Question

我刚刚计划创建一个程序，我需要使用DBHost，DBUser，DBPassword和DBName连接USER的数据库，以将未来需要的值保存在MySQL服务器上。 对于这一点，我已经写了这样的代码：

<?php session_start(); ?> 
 
<?php 
 

 
require('functions.php'); 
 
iq_add_style('DBConForm_Styles' , 'assets/scripts/css/iq_styles' , 'stylesheet' , 'css'); 
 

 
function IQ_DB_Form(){ 
 
    ?> 
 

 
    <form id="iq-dbconform" method="post" action="<?php $_SERVER['PHP_SELF'] ?>"> 
 
    <label>Server Host:&nbsp;<input type="text" maxlength="15" placeholder="localhost" name="host-name" /></label> 
 
    <label>Database User:&nbsp;<input type="text" maxlength="15" placeholder="root" name="user-name" /></label> 
 
    <label>Password:&nbsp;<input type="password" maxlength="15" placeholder="User Password" name="user-pass" /></label> 
 
    <label>Name of the Database:&nbsp;<input type="text" maxlength="20" placeholder="developing_house" name="db-name" /></label> 
 
    <input type="submit" value="Connect" name="dbconbtn" />&nbsp;<input type="reset" value="Reset" name="dbresetbtn" /> 
 
    </form> 
 

 
    <?php 
 
} 
 
IQ_DB_Form(); 
 

 
// Database connection 
 
$dbhost = $_POST['host-name']; 
 
$dbuser = $_POST['user-name']; 
 
$dbpass = $_POST['user-pass']; 
 
$dbname = $_POST['db-name']; 
 

 
$db_details = array(
 
    'host' => $dbhost, 
 
    'user' => $dbuser, 
 
    'password' => $dbpass, 
 
    'dbname' => $dbname, 
 
); 
 
$IQcon = mysqli_connect($db_details['host'],$db_details['user'],$db_details['password'],$db_details['dbname']); 
 

 

 

 
// Check connection 
 
if (mysqli_connect_errno()) 
 
    { 
 
    echo "Looks like an Error connecting IQubex Database: " . mysqli_connect_error(); 
 
    } 
 

 
// Store Values in Session 
 
foreach ($_POST as $key => $value) { 
 
    ${$key} = $value; 
 
    $_SESSION[$key] = $value; 
 
} 
 

 
echo $_SESSION['db-name']; 
 
echo $_SESSION['user-pass']; 
 
echo $_SESSION['user-name']; 
 

 
// Perform queries 
 
if ($IQcon){ 
 
mysqli_query($IQcon,"CREATE TABLE `Persons` (
 
    `FirstName` varchar(30) NOT NULL, 
 
    `LastName` varchar(60) NOT NULL, 
 
    `Age` int(255) NOT NULL, 
 
);"); 
 
mysqli_query($IQcon,"CREATE TABLE `MadBoys` (
 
    `FirstName` varchar(30) NOT NULL, 
 
    `LastName` varchar(60) NOT NULL, 
 
    `Age` int(255) NOT NULL, 
 
);"); 
 
mysqli_close($IQcon); 
 
} 
 
else{ 
 
    echo "There seems a problem with your server."; 
 
} 
 
?>

，这样，当我写echo $_SESSION['db-name']，印在插入数据库的名字我已经在会话中保存数据库配置表单值。但是当页面重新加载，在页面上再次返回时，或者类似的东西，所有的值都会被重置！因此，我不希望我的用户一次又一次地连接数据库。我希望它永久保存，以便我可以为下一个程序步骤工作。

Answer 1

您可以检查值是否保存在会话中。如果他们不连接到数据库否则得到的值，并将其保存在DB：

请参见下面的例子：

session_start(); 
if(isset($_SESSION['stored-in-db'])) 
{ 
    //USE SESSION VALUES 
} 
else 
{ 
$dbhost = $_POST['host-name']; 
$dbuser = $_POST['user-name']; 
$dbpass = $_POST['user-pass']; 
$dbname = $_POST['db-name']; 

$db_details = array(
    'host' => $dbhost, 
    'user' => $dbuser, 
    'password' => $dbpass, 
    'dbname' => $dbname, 
); 
    $IQcon = mysqli_connect($db_details['host'],$db_details['user'],$db_details['password'],$db_details['dbname']); 
    foreach ($_POST as $key => $value) 
    { 
     $_SESSION[$key] = $value; 
    } 
    $_SESSION['stored-in-db] = true; 
} 

Answer 2

尝试添加

session_start(); 

在您的网页，上面你正在使用会话。