Access variable from include in blade template in php

I have a blade template that includes other blade template. Here is the main template called accountnav.blade.php

@if (count($subaccounts) > 0)
   <ul class="nav navbar-nav">
       @foreach ($subaccounts as $account)
           @include('frontend.template.subaccount', array('p_link' => $account->link))
       @endforeach
   </ul>
@endif

and here is the included template titled subaccount.blade.php

<li >
        @if(count($account->children) == 0 )
            <a href=""></a>
        @else
            <a class="dropdown-toggle" data-toggle="dropdown" href="#" onclick="return false;" aria-expanded="false">
            
                <i class="icon-caret-down"></i>
            </a>
        @endif
    @if (count($account->children) > 0)
        <ul class="dropdown-menu">
            @foreach($account->children as $account)
                 @include('frontend.template.subaccount', array('p_link' => $account->link))
            @endforeach
        </ul>
    @endif
</li>

However, when I tried to access the variable p_link in the subaccount.blade.php, there is an error that says the variable $p_link is not defined.

What is the correct way to pass a variable in an @include and how to access the passed variable?

via Chebli Mohamed