title: using if empty , but it needs to see 0 as a item
body: <p>I am making a enquete for school , and you need to give numbers for each thing , so 0 is a number that is possible , but I use if empty , like this :</p>
  
  <pre><code>if (empty($Jurylid) or empty($Organisatie) or empty($Firma) or empty($Standnummer) or empty($Aanmelden) or empty($Ontvangst) or empty($Contact) or empty($Gesprek) or empty($Luisteren) or empty($ProductKennis) or empty($HandelKennis) or empty($Onderhandelen) or empty($TaalGebruik) or empty($Voorkomen)){
      echo "&lt;script&gt;alert('Make sure everything is filled in!')&lt;/script&gt;";
      echo "&lt;script&gt;document.location.href='Enquete.php'&lt;/script&gt;";
  
  }
  </code></pre>
  
  <p>So how can I make sure it counts 0 as a number ,and not as a empty?
  The $Jurylid etc are coming for radio buttons from another page.</p>