gistfile1.aw

<?php
function humanize($string){
  return ucwords(str_replace('_',' ',$string));
}
if(isset($_POST['email'])){ //just picking this because you need something
  $errors = array();
  foreach($_POST as $name => $field){
    if(substr($name, 0, 1) == '_'){
      continue;
    }else{
      if(empty($field)){
        $errors[$name] = humanize($name) . ' cannot be blank';
      }
    }
  }
  if(count($errors) > 0){
    $error_message = '<h3>The following ' . ((count($errors) == 1) ? 'field needs' : 'fields need') . ' your attention:</h3><ul>';
    foreach($errors as $error){
      $error_message .= '<li>' . $error . '</li>';
    }
    $error_message .= '</ul>';
  }else{
    //do whatever you do to a successful form post here
    header('Location: success.html');
    exit;
  }
}
?>