title: How to add double quote in values inside a PHP variable and convert it to an array
body: <p>I have this variable <code>$numbers</code> and it contains values like this way-> <code>1,2,3,4,5</code></p>
  
  <p>So when I echo this <code>$number</code> I naturally see like this-> <code>1,2,3,4,5</code>  </p>
  
  <p>Now, Could you please tell me how to convert the variable "<code>$number</code>" like following</p>
  
  <pre><code>$topic=array("1","2","3","4","5");
  </code></pre>