title: explode two-item-list in array as key=>value
body: <p>I'd like to explode a multi-line-string like this</p>
  
  <pre><code>color:red
  material:metal
  </code></pre>
  
  <p>to an array like this</p>
  
  <pre><code>$array['color']=red
  $array['material']=metal
  </code></pre>
  
  <p>any idea?</p>