PHP会话变量不跨页携带

Question

Hi I have created two session variables with the purpose of storing the list of ids of the query in a Comma-separated string to be broken apart into an array later. The code works fine when I was running the code on localhost with apache; however, when I upload the file on the actual server the $_SESSION variables declared in the main page never gets carried over to the second place. I did an if statement on case.php page to test it, and I also did a var_dump() and they all showed NULL.

I was wondering is there anything I need to configure with the server? As it reads PHP and does all other functions without any errors. Appreciate any help or comments.

Please see code below:

Main page: patients.php

<?php 
// store session data 
session_start(); 
// store SQL line

// store patient ID
$_SESSION['pid']='';

// store case ID
$_SESSION['cid']='';


...
while ($record = mysql_fetch_row($result)) {

    $patient = $record[0];
    $statusD = $record[1];
    $substatusD = $record[2];
    $caseCount = $record[3];
    $statusReason = $record[4];
    $dateReviewed = $record[5];
    $caseID = $record[6];
    $lastUser =$record[7];  

    //statusFlagged($patient,$caseID,$dateReviewed);            
    $statusFlagged = $record[8];
    //StatusFlag should be working as of 5/30/2013. Please double check

    // comma-delimited patient ID
    $_SESSION['pid'].=$patient.',';

    // comma-delimited case ID
    $_SESSION['cid'].=$caseID.',';

Next Page: case.php

<?php 
// start session data 
session_start(); 
if(isset($_SESSION['pid'])) {
echo "Your session is running " . $_SESSION['pid'] . "and" . $_SESSION['cid'];
}
else { echo "Session not running";}

$patientIDString = $_SESSION['pid'];
$caseIDString = $_SESSION['cid'];
$patientIDArray = explode(',', $patientIDString);
$caseIDArray = explode(',', $caseIDString);

Answer 1

Thanks for the helpful suggestions. I found the solution by making sure that the path stored in session.save_path under php.ini is accessible. Particularly if you are working with Apache. Need to make sure that the owner of the directory is the same as apache.

After changing the path and the read/write access, everything works as it should.