PHP/MYSQL - 如何将从数据库中获取的数据（存储在变量中）分配给会话变量？

Question

我在传递从数据库中获取并存储在变量中的数组变量并将它们传递到会话变量以在整个站点上使用时遇到了一点问题。

代码：

$rid=$_SESSION['SESS_MEMBER_ID'] ;

$recquery = 'SELECT * FROM clinic_receptionist,clinic_table where clinic_receptionist.recep_clinic_id = clinic_table.ID AND recep_id ='.$rid;

$recresult = mysqli_query($conn,$recquery);

if(mysqli_num_rows($recresult)>0)
{
while($row = mysqli_fetch_assoc($recresult))
{
$cid = $row['clinic_id'];
$cname = $row['clinic_name'];
$name = $row['recep_full_name'];
$phone = $row['recep_mobile'];
$email = $row['recep_email'];
$address = $row['recep_address'];
$gender = explode(",",$row['recep_gender']);
$dob = $row['recep_dob'];
$doj = $row['recep_doj'];
}
}
?>

上面的代码是选择查询发生的地方。我想知道如何将$cid 和$cname 分配给不同页面中的$_SESSION 变量。任何帮助将非常感激。谢谢

代码：

<?php session_start();
include('header.php');

include('menu.php');
include('config.php');

$appquery = 'SELECT * FROM appointment_table,clinic_table where clinic_table.ID = appointment_table.clinic_id';
$appresult = mysqli_query($conn,$appquery);
if(mysqli_num_rows($appresult)>0)
{
while($row = mysqli_fetch_array($appresult))
{
$_SESSION['cid'] = $row['ID'];
$_SESSION['cname'] = $row['clinic_name'];
$ptdate = $row['date'];
$pttime = $row['time'];
$ptname = $row['pt_name'];
$ptphone = $row['pt_ph_num'];
$ptemail = $row['pt_email_id'];

}
}
?>

上面的代码是我想要接收 id 和诊所名称的地方。

Answer 1

<?php
    // Start the session
    session_start();

    //Assigning the values to $_SESSION
    $_SESSION['cid'] = $row['clinic_id'];

    $_SESSION['cname'] = $row['clinic_name'];;
    ?>

session_start

Answer 2

你需要在每个页面上调用session_start()来初始化会话，当然；之后你就可以了

$_SESSION['cid'] = $cid;
$_SESSION['cname'] = $cname;

将这些值存储在$_SESSION。

顺便说一句，有人会告诉你对那个查询使用准备好的语句，所以它可能是我。

也许是为了说明。

page1.php:

<?php
    session_start();  // find session, or create new one

    include('header.php');
    include('menu.php');
    include('config.php');

    $appquery = 'SELECT * FROM appointment_table,clinic_table where clinic_table.ID = appointment_table.clinic_id';

    $appresult = $conn->query($appquery);
    if(($rowcount = $appresult->num_rows()) > 0)
    {
        // create arrays to pass data
        $cids = array($rowcount);
        $cnames = array($rowcount);
        $i = 0;
        while($row = $appresult->fetch_array())
        {
            // add values to arrays
            $cids[$i] = $row['ID'];
            $cnames[$i] = $row['clinic_name'];
            $i++;
        }
        // add arrays to session
        $_SESSION['cids'] = $cids;
        $_SESSION['cnames'] = $cnames;
    }

page2.php:

<?php
    session_start();  // find session, or create new one

    include('header.php');
    include('menu.php');
    include('config.php');

    // retrieve arrays from session        
    $cnames = $_SESSION['cnames'];
    $cids = $_SESSION['cids'];

    // ... and print them
    $count = count($cids);
    for ($i = 0; $i < $count; $i++)
    {
        echo "cid = " . $cid[$i] . "; cname = " . $cname[$i] . "<br>";
    }

page1.php 执行查询并将cid 和cname 值存储在数组中，然后存储在$_SESSION 中。 page2.php 从$_SESSION 检索数组并将它们回显。当然，在生产中，在显示查询的页面上运行查询会被认为更有效，并且只在页面之间传递键值。

我还为mysqli 使用了对象语法而不是过程语法，只是为了展示它的样子。像往常一样，我将错误处理留给读者作为练习。