title: php split each value of an array into 2 with a delimiter
body: <p>I have a php array with each value in array having a <code>space</code> delimiter like</p>
  
  <pre><code>a[1]="1 32"
  a[2]="2 33"
  a[3]="3 67"
  ...
  </code></pre>
  
  <p>I want to divide this array into 2 arrays using the delimiter <code>space</code>. Result should be something like:</p>
  
  <pre><code>a[1]="1"
  a[2]="2"
  a[3]="3"
  ...
  b[1]="32"
  b[2]="33"
  b[3]="67"
  ...
  </code></pre>
  
  <p>What should be the optimal way to go about this?</p>