Laravel Session Forget using key - laravel

Question

I've tried to use session forget of laravel but unfortunately I cant manage to run it also I'm trying to use UNSET() still not working, attached below is Controller for receiving a new product via saving is using array and validating whenever that product is already saved it will no be saved anymore.
$product_details = array('product_id' => $request->get('product_id'),
'product_qty' => $request->get('product_qty'));
$products = $request->session()->get('product');
if ($request->session()->has('product')) {
foreach ($products as $key => $value)
{
if($value['product_id']==$request->get('product_id'))
{
$request->session()->forget('product',$request->get('product_id'));
}
}
session()->push('product', $product_details);
}
else
{
session()->push('product', $product_details);
}
return true;

Answer 1

If I get your question, this code should work and a bit of optimizing. You don't need to forget old product and add a new product, that waste of time, just add a flag $product_exists to define is exists or not then add/not add.
$product_details = array('product_id' => $request->get('product_id'),
'product_qty' => $request->get('product_qty'));
$product_exists = false;
if ($request->session()->has('product'))
{
$products = $request->session()->get('product');
foreach ($products as $key => $value)
{
if($value['product_id']==$request->get('product_id'))
{
$product_exists = true;
}
}
if(!$product_exists){
session()->push('product', $product_details);
}
} else {
session()->push('product', $product_details);
}
return true;
Hope this help.

Answer 2

I did my own version by using .$key
$product_details = array('product_id' => $request->get('product_id'),
'product_qty' => $request->get('product_qty'));
$products = $request->session()->get('product');
if ($request->session()->has('product')) {
foreach ($products as $key => $value)
{
if($value['product_id']==$request->get('product_id'))
{
$request->session()->forget('product.'.$key);
}
}
session()->push('product', $product_details);
}
else
{
session()->push('product', $product_details);
}
return true;
}