title: Fastest way to convert php associate array to string
body: <p>What will be the fastest and best way to convert the following PHP associate array to a string without json.</p>
  
  <p>array</p>
  
  <pre><code> Array ( [0] =&gt; A [1] =&gt; S [2] =&gt; G) 
  </code></pre>
  
  <p>to a string, exactly like</p>
  
  <pre><code>String =  "A, S, G";
  </code></pre>
  
  <p>Most of the solutions available are using JSON, that I don't want to use. plus I want to know the "Fastest" and "Best" way.</p>