title: how to change the array key to start from 1 instead of 0
body: <p>I have values in some array I want to re index the whole array such that the the first value key should be 1 instead of zero i.e. </p>
  
  <p>By default in PHP the array key starts from 0. i.e. <code>0 =&gt; a, 1=&gt; b</code>, I want to reindex the whole array to start from key = 1 i.e  <code>1=&gt; a, 2=&gt; b, ....</code> </p>