title: Delete entry in nested PHP array
body: <p>I want to delete the entry identified by  <code>c9f0f895fb98ab9159f51fd0297e236d</code> from the array below. How could I do this? Your help will be greatly appreciated. Thanks in advance.</p>
  
  <pre><code> array (size=12)
     'session_id' =&gt; string 'd1ac9074e254a49429c6ad3aeb19aef5' (length=32)
     'ip_address' =&gt; string '127.0.0.1' (length=9)
     ...
     'cart_contents' =&gt; 
       array (size=8)
         'c9f0f895fb98ab9159f51fd0297e236d' =&gt; 
           array (size=15)
             'id' =&gt; string '8' (length=1)
             'code' =&gt; string 'aloo-chana-puri-v' (length=17)
             ...
         ...
  </code></pre>