session variable name as a variable?-CodePudding

I try to make a session variable where the session variable name should be diffrent, and therefore i make the session variable name a variable name:

$nummer = $_POST['nummer'];
$num = $nummer; 

$vareInfo = array(
    "vareNummer" => "$nummer",
    "vareNavn" => "$vare",
    "varePris" => $pris, 
    "vareBillede" => $VarBillede, 
    "vareAntal" => $antal
);
$_SESSION[$num] = $vareInfo;
$_SESSION[$pris] = "hukabuka";

but i dosen't work, i just changeching the the other sessioen to the new value?

it output this:

Array ( [vareNummer] => 182162 
        [vareNavn] => Solsikke 
        [varePris] => 120 
        [vareBillede] => 63c7cba6cac6d7.24544415.jpg 
        [vareAntal] => 1 
    )

and next time i run it it changing it instead of making a new

CodePudding user response：

To prevent that your session gets overwritten add a check if the session already exists.
That way it only gets created once for each unique $num

$nummer = $_POST['nummer'];
$num = $nummer; 

$vareInfo = array(
    "vareNummer" => "$nummer",
    "vareNavn" => "$vare",
    "varePris" => $pris, 
    "vareBillede" => $VarBillede, 
    "vareAntal" => $antal
);
if(!isset($_SESSION[$num])){
  $_SESSION[$num] = $vareInfo;
}
if(!isset($_SESSION[$pris])){
  $_SESSION[$pris] = "hukabuka";
}

CodePudding user response：

An example how this can be made to work (using PHP 8.2):

my_form.html:

<form action="do_stuff.php" method="POST">
    <input id="data1" name="data1" type="text">
    <input id="data2" name="data2" type="text">
    <input type="submit" value="Do">
</form>

do_stuff.php:

<?php
session_start();

$nummer = $_POST['data1'];
$num = $nummer; 
$pris = $_POST['data2'];
$vareInfo = array(
    "vareNummer" => "$nummer",
    "varePris" => $pris
);
$_SESSION['my_data'][$num] = $vareInfo;
$_SESSION['my_data'][$pris] = "hukabuka";

// or, the session variables can be set using a prefix:
//$_SESSION['my_data_' . $num] = $vareInfo;

?>

EDIT ADD:

An example session data from posting twice from the form using two unique data1 values would be as shown below. The values are 1234 and 7890.

Array ( 
    [my_data] => 
        Array ( 
         [1234] => Array ( [vareNummer] => 1234 [varePris] => 55 ) 
         [55] => hukabuka 
         [7890] => Array ( [vareNummer] => 7890 [varePris] => 99 ) 
         [99] => hukabuka 
        ) 
)

CodePudding user response：

<?php 
$nummer = $_POST['nummer'];
$num = $nummer; 

$vareInfo = array(
    "vareNummer" => "$nummer",
    "vareNavn" => "$vare",
    "varePris" => $pris, 
    "vareBillede" => $VarBillede, 
    "vareAntal" => $antal
);
if(!empty($_SSESSION[$num])) {
$_SESSION[$num] = $vareInfo;
} 
if(!empty($_SESSION[$pris])) {
$_SESSION[$pris] = "hukabuka";
}
?>