title: why session push in laravel store my value in new array with zero index
body: <p>my first code line is </p>
  
  <pre><code>Session::put('step_1', array('security' =&gt; 'yes'));
  </code></pre>
  
  <p>2nd is </p>
  
  <pre><code>    $vat=10;
      \Session::push('step_1.vat',$vat);
  </code></pre>
  
  <p>my current output:</p>
  
  <pre><code>Array
  (
      [security] =&gt; yes
      [vat] =&gt; Array
          (
              [0] =&gt; 10
          )
  
  )
  </code></pre>
  
  <p><strong>My Desired Output:</strong></p>
  
  <pre><code>Array
  (
      [security] =&gt; yes
      [vat] =&gt; 10
  )
  </code></pre>
  
  <p>hot to achieve my desired output, please suggest, thanks. </p>