Undefined index error

[makamo66]

How do I get my session to be unset?

My form looks like this:

foreach ($joined as $i => $qty){
echo "<form action='' method='get' name='yourForm'>";
echo "<button type='submit' name='remove_" . $i . "' value='remove_" . $i . "' class='deletebtn' >X</button>";
echo "</form>";
}

My SESSION is defined like this:

for($i=0; $i<=5; $i++){
if (isset($_REQUEST["element_id_$i"]) ) {
$_SESSION["element_id_$i"] = $_REQUEST["element_id_$i"];
$id = $_SESSION["element_id_$i"];    
array_push($_SESSION["element_id"],$id);
}
$id = $_SESSION["element_id"];
}

and the form submits to:

if (isset($_REQUEST["remove_$i"]) ){

unset($_SESSION["quantity[$i]"]);
unset($_SESSION["element_id[$i]"]);
var_dump($_SESSION["element_id"]);
var_dump($_SESSION["quantity"]);
echo "Received variable " . $_REQUEST["remove_$i"];
echo 'TARGET INDEX TO BE REMOVED: ' . $_SESSION["element_id[$i]"] . '<br><br>';
}

The output is:

array(1) { [0]=> string(1) "1" } array(1) { [0]=> string(1) "1" } Received variable remove_1
Notice: Undefined index: element_id[1] in C:\xampp\htdocs\TopView\cart5.php on line 147
TARGET INDEX TO BE REMOVED: 
 

[requinix]

Look at what you call the element thing in the session according to the first bit of code, then look at what you call it in the second bit of code.