laravel token in url code example

Example 1: current URL without url site laravel

is work
{{Request::path()}}
or
request()->path()

Example 2: comment = Comment::find($this->route('comment')); in laravel

Schema::create('comments', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('user_id')->unsigned();
            $table->foreign('user_id')->references('id')->on('users')->onCascade('update')->onDelete('cascade');
            $table->integer('post_id')->unsigned();
            $table->foreign('post_id')->references('id')->on('users')->onCascade('update')->onDelete('cascade');
            $table->text('comment');
            $table->timestamps();
            $table->rememberToken();
        });