title: How to re-index all subarray elements of a multidimensional array?
body: <p>The question is how to reset key e.g. for an array:</p>
  
  <pre><code>Array ( 
      [1_Name] =&gt; Array ( 
          [1] =&gt; leo 
          [4] =&gt; NULL 
      ) 
      [1_Phone] =&gt; Array ( 
          [1] =&gt; 12345 
          [4] =&gt; 434324
      )  
  )
  </code></pre>
  
  <p>reset to :</p>
  
  <pre><code>Array ( 
      [1_Name] =&gt; Array ( 
          [0] =&gt; leo 
          [1] =&gt; NULL 
      ) 
      [1_Phone] =&gt; Array ( 
          [0] =&gt; 12345 
          [1] =&gt; 434324
      ) 
  )
  </code></pre>