any help you offer on this will be useful. Am working on my school project and this error code keeps popping up on the application "Undefined index: client_id" on line 1001"
Here is the code
public function onNewclientaddress(){
    $addShipmentForm  = Settings::get('addShipmentForm',true);
    $data = post();
      = \Spot\Shipment\Models\Address::where('user_id', $data['client_id'])->update(['default' => 0]);
    if ( $addShipmentForm == "add_form_normal"){
        $subitem = new \Spot\Shipment\Models\Address;
        $subitem->name              = htmlspecialchars($data['street_addr']);
        $subitem->user_id           = htmlspecialchars($data['client_id']);
        $subitem->street            = htmlspecialchars($data['street_addr']);
        $subitem->city              = htmlspecialchars($data['city_id']);
        $subitem->zipcode           = htmlspecialchars($data['postal_code']);
        $subitem->country            = htmlspecialchars($data['country_id']);
        $subitem->default           = 1;
        $subitem->created_at        = \Carbon\Carbon::now();
        $subitem->updated_at        = \Carbon\Carbon::now();
        $subitem->save();
    }
    else{
       line 1001 is the first line of code in the post. please pardon my English
 
    