title: How do I fix this error in PHP: "A non well formed numeric value encountered"
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/6136430/a-non-well-formed-numeric-value-encountered">A non well formed numeric value encountered</a>  </p>
  </blockquote>
  
  
  
  <p>Why doesn't this work?</p>
  
  <pre><code>echo gmdate('Y-m-d H:i:s',strtotime('+7 days','2035-01-01 00:00:00'));
  </code></pre>
  
  <p>The error I see is:</p>
  
  <blockquote>
    <p>A non well formed numeric value encountered</p>
  </blockquote>