PHP ITForm::add_nonce示例

 function start_form($options = array(), $nonce_var = null)
 {
     if (isset($_REQUEST['page'])) {
         list($location, $query) = explode('?', $_SERVER['REQUEST_URI']);
         $file = basename($location);
         if ('admin.php' == $file) {
             $default_action = "{$location}?page={$_REQUEST['page']}";
         } else {
             if ('edit.php' == $file && isset($_REQUEST['post_type'])) {
                 $default_action = "{$location}?post_type={$_REQUEST['post_type']}&page={$_REQUEST['page']}";
             }
         }
     }
     if (!isset($default_action)) {
         $default_action = $_SERVER['REQUEST_URI'];
     }
     $defaults = array('id' => 'posts-filter', 'enctype' => 'multipart/form-data', 'method' => 'post', 'action' => $default_action);
     $options = array_merge($defaults, $options);
     echo '<form';
     foreach ((array) $options as $var => $val) {
         if (!is_array($val)) {
             $val = str_replace('"', '&quot;', $val);
             echo " {$var}=\"{$val}\"";
         }
     }
     echo ">\n";
     if (false !== $nonce_var) {
         ITForm::add_nonce($nonce_var);
     }
 }