PHP数据库查询未及时完成？

Question

I have a php function that on page load checks the database to see if a session exists for the user that may be resuming a session. If nothing exists in the database, we start them on "Step 1" of the process. However, if they do have an active session they are returning to, we get the current step number they left off on. Here is my code:

<?php   
//Start the session we will use to track the activity.
session_start();

//Get the session ID from a previous session if it exists; if not, create one.
$sessionID = $_GET['session'];
$sessionID = ($sessionID ? $sessionID : session_id());

//Define some vars
$mainPage = 'wizard';
require_once('includes/header.php'); 

//Lets see if we can retrieve an active session for the user.
$objDB = new DB;
    $retrieveSession = $objDB->setStoredProc('shadowFetchUserSession')
         -> setParam("sessionID", $sessionID)   
         -> setParam("empID", $empID)    
         -> execStoredProc()
         -> parseXML();

//Do we have a session already?
if($retrieveSession->sessionData){

            //This doesnt seem to get the variable in time before the rest of the code fires.
    $currentStep = $retrieveSession->sessionData->currentStep;

}else{  

//Since we didnt get a step number from the session, lets start at 1.
    $currentStep = 1;   

//Lets add the session to the database now that we have the sessionID and the current step.
$objDB = new DB;
    $makeSession = $objDB->setStoredProc('shadowCreateSession')
         -> setParam("sessionID", $sessionID)   
         -> setParam("empID", $empID)    
         -> setParam("currentStep", $currentStep)            
         -> execStoredProc();    
}
?>

If you look inside this statement

 if($retrieveSession->sessionData){

The $currentStep variable seems to not be getting set before other parts of the code below this have executed.

Is there something obvious I'm missing?

Answer 1

Is this as simple as you having the If Else Endif terminator in the wrong place??

session_start();

//Get the session ID from a previous session if it exists; if not, create one.
$sessionID = $_GET['session'];
$sessionID = ($sessionID ? $sessionID : session_id());

//Define some vars
$mainPage = 'wizard';
require_once('includes/header.php'); 

//Lets see if we can retrieve an active session for the user.
$objDB = new DB;
$retrieveSession = $objDB->setStoredProc('shadowFetchUserSession')
                         -> setParam("sessionID", $sessionID)   
                         -> setParam("empID", $empID)    
                         -> execStoredProc()
                         -> parseXML();

//Do we have a session already?
if($retrieveSession->sessionData){

    //This doesnt seem to get the variable in time before the rest of the code fires.
    $currentStep = $retrieveSession->sessionData->currentStep;
} else {  

    //Since we didnt get a step number from the session, lets start at 1.
    $currentStep = 1;   
}

//Lets add the session to the database now that we have the sessionID and the current step.
$objDB = new DB;
$makeSession = $objDB->setStoredProc('shadowCreateSession')
                     -> setParam("sessionID", $sessionID)   
                     -> setParam("empID", $empID)    
                     -> setParam("currentStep", $currentStep)            
                     -> execStoredProc();    

?>

If thats it, then proper indentation of code may help you identify issues in the future.