title: divide the multidimensional array
body: <p>I have an initial array:</p>
  
  <pre><code>array
  ( [no] =&gt; array 
            (
               [&lt;30] =&gt; 3
               [&gt;30] =&gt; 5
               [&gt;50] =&gt; 2
            )
    [yes] =&gt; array
            (
               [&lt;30] =&gt; 4
               [&gt;30] =&gt; 2
               [&gt;50] =&gt; 7
            ) 
    [maybe] =&gt; array
            (
               [&lt;30] =&gt; 7
               [&gt;30] =&gt; 9
               [&gt;50] =&gt; 10
            ) 
  )
  </code></pre>
  
  <p>whether the above array can be split into multiple array variables by yes, no and maybe. such as :</p>
  
  <pre><code>$yes = array(3,5,2);
  $no = array(4,2,7);
  $maybe = array(7,9,10);
  </code></pre>