Variable not updating always getting a NULL VALUE

[JustBob]

PHP Code:

if(isset($_POST['add'])){
foreach($_SESSION as $ps => $value){
$getcartname = (explode('_', $ps));
if($getcartname[0] == 'ps'){
$getLine = (explode('_', $ps));
$line = $getLine[0];
$getVal = (explode('_', $value));
$arrayContent = $getVal[0];
$arrTotal += $arrayContent;
}
}
if($line == ''){
$line = 1;
}
else{
$line++;
}
$_SESSION['ps_'.$line] = $num.'_'.$totalqtyt.'_'.$amount;
tempList();
} 


The script is suppose to do...

If add has been set, check the array with ps_ if $line is NULL meaning the array is empty, set the $line to 1 if not increment $line.

My problem is it doesnt seem to increment line after the first 'clicking' of $_POST['add']; What seems to be the problem?

[Fou-Lu]

This can be simplified:

PHP Code:

$iTotal = 0;
$line = 0;
foreach ($_SESSION AS $ps => $value)
{
    list($type, $line) = explode('_', $ps);
    if (strcascmp($type, 'ps') == 0)
    {
        list($num, $qty, $amt) = explode('_', $value);
        $iTotal += $num;
    }
}
$line = $line > 0 ? ++$line : 1; 


This of course does not accommodate for gaps. IMO this is also way too much work, sessions are serialized, and any type that can be serialized can be added to a session. This does include arrays and objects, so you can add as many dimensions as you want and can completely avoid the explode mess.