title: php remove key on $_POST
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/2448964/php-how-to-remove-specific-element-from-an-array">PHP: How to remove specific element from an array?</a>  </p>
  </blockquote>
  
  
  
  <p>Here in my $_POST, I am quite confused on how to trim or drop the key 'submit'. I'm quite confused with this array manipulation. Thanks.</p>
  
  <pre><code>Array
  (
      [Physical_Education] =&gt; 43
      [Statistics] =&gt; 34
      [Biology] =&gt; 43
      [Math] =&gt; 34
      [quarter] =&gt; 1
      [submit] =&gt; Submit Grades
  )
  </code></pre>