title: Removing non-integer entries from an array
body: <p>I have a PHP array like this one:</p>
  
  <pre><code>array( [0] =&gt; 1
         [1] =&gt; 2
         [2] =&gt; 3
         [3] =&gt; Some strings
  )
  </code></pre>
  
  <p>How can I remove an entry that is not an integer number from an array? I need to output this:</p>
  
  <pre><code>array( [0] =&gt; 1
         [1] =&gt; 2
         [2] =&gt; 3
  )
  </code></pre>
  
  <p>Can someone give me a clue?</p>