title: Insert at start of array a key-value pair in php
body: <pre><code>array_unshift ($ids,$product_id =&gt; $catalog_tag);
  </code></pre>
  
  <p>if i put</p>
  
  <pre><code>array($product_id =&gt; $catalog_tag) 
  </code></pre>
  
  <p>would work but wont add $product_id as key..
  I want to add it at the start</p>