title: Prevent json_encode associative array sorting
body: <p>I have a associative array</p>
  
  <pre><code>Array(
     [289] =&gt; Array(
      'name'=&gt; 'One'
     ),
     [292] =&gt; Array(
      'name'=&gt; 'One'
     ),
     [290] =&gt; Array(
      'name'=&gt; 'One'
     )
  )
  </code></pre>
  
  <p>After i use json_encode on this array. The keys are sorted, although i get it as JSON object.</p>
  
  <p>Is there way to prevent this behaviour?</p>