php - Storing multiple values in $_SESSION array

496

I am new to php and this issue is bugging me sincelast one day. I have three pages, 1. classpage.php ---- which holds,

<?php
session_start();

class addStock{
    public function storeSessArray($stk_code){
         array_push($_SESSION['recentlyView'],$stk_code);
    }
}

?>

logic.php---which holds,

$_SESSION['recentlyView']=array();
$checkSession = new addStock;

$chkSession = $checkSession->storeSessArray($val);
echo '<pre>';
print_r($_SESSION);
echo '</pre>';
?>

and 3. front.php which holds

<!DOCTYPE html>
<html lang="">

<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Title Page</title>
</head>

<body>
<?php
   $val='5';
?>
<?php
   include 'logic.php';
?>
</body>

</html>

I want to keep an array of values stored in$_SESSION['recentlyView'] array when someone loads front.php. But each time I assign a different value to $val, only the last value which was stored in $val appears in$_SESSION['recentlyView'] array. I want each of the value that was used in$val to be stored in$_SESSION['recentlyView']

994

Answer

Solution:

Likely you keep overwriting the session array. Try checking if it’s set already:

if(!isset($_SESSION['recentlyView']))
    $_SESSION['recentlyView'] = array();

This will only set the array once, then your method will just add to it.

Also, as noted in the other answer, make sure to put thesession_start(); in the most top-level page at the very beginning.

780

Answer

Solution:

try this, it should solve your problem.

class addStock{

public function storeSessArray($stk_code){

   $_SESSION['recentlyView'][] =$stk_code;

}

}

207

Answer

Solution:

You must callsession_start() before there is any output. The documentation notes

To use cookie-based sessions, session_start() must be called before outputing anything to the browser.

As you've presented your code, the very first thing that is loaded isfront.php which includeslogic.php which calls the class inclasspage.php. (I don't see how that page is referenced-- whether it is by include or spl.

You've got the right idea in separating your presentation from the logic, but you've got the order backwards. The very first thing that needs to happen is the execution and loading of relevant php code, with presentation being the very last thing that happens. Unfortunately the very first things that happens in your script is it immediately starts output.

The solution is to funnel all requests through index.php (look up how to do seo-friendly urls), and from there use a "front controller" or "router".

Short of that, you need to include a brief php section on top of front.php, so that session start is called before output.

<?php
    session_start();
    include 'logic.php'; // don't print anything from your logic; pass back a variable to print below.
?>
<!DOCTYPE html>
<html lang="">
....

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