title: php function integer parameter problem
body: <pre><code>function is_zipcode_valid($zipcode){ ... }
  </code></pre>
  
  <p>if I call that function with <code>is_zipcode_valid(08004);</code>
  my parameter 08004 gets in as 8004, basically it removed all precending 0's.</p>
  
  <p>How can I get around that problem?</p>
  
  <p>thanks</p>