title: php create empty JSONarray
body: <p>How do I create an empty JSON array?</p>
  
  <p>I tried <code>$finalJSON["items"][0] =  '';</code> but that gave me <code>{"items":[""]}</code> </p>
  
  <p>I tried <code>$finalJSON["items"][0] =  null;</code> but that gave me <code>{"items":[null]}</code> </p>
  
  <p>What I actually want is <code>{"items":[]}</code> </p>
  
  <p>How to achieve this?</p>