title: string split using regex PHP
body: <p>My string is <code>"30OKOKOKOKOKOKOKOK30OKOKOKOKOKOKOKOKOKOKOKOKOKOK120"</code> 
  i want to split it in digits and 'OK' string, my expected output is </p>
  
  <pre><code>array(0=&gt;30,1=&gt;OK,2=&gt;OK,......,n=&gt;120)
  </code></pre>
  
  <p>currently i am using this </p>
  
  <pre><code>preg_match_all('!\d+!', $str, $matches);
  </code></pre>
  
  <p>but it only returns me digits i.e. 30,30,120 
  please help me to get above expected output</p>