See http://www.dokuwiki.org/plugin:newpagetemplate

This plugin loads into the new page creation box a template specified in the $_REQUEST “newpagetemplate” parameter. Effectively, this means that you can pass a template page, similar to the namespace template pages, either in the URL or in a POST form to the creation page. I've posted a patch below to modify the addnewpage plugin to take advantage of this functionality.

How do I use this? If I have a template that I would like students to use for a particular homework set, say “:templates:homeworkset1”, then I just put

{{NEWPAGE>|newpagetemplate=:templates:homeworkset1&newpagevars=@LINK@,[[link:to:homework:page]]}}

in the homework submission page. Any page a student creates using the resulting “Add new page” button will automatically be pre-filled in with the template. In addition, the template will substitute the variable @LINK@ with the link I provided ([[link:to:homework:page]]).

Here is the patch for the addnewpage plugin:

--- syntax.php  (revision 1141)
+++ syntax.php  (revision 1142)
@@ -28,8 +28,8 @@
     }
 
     function handle($match, $state, $pos, &$handler){
-         $ns = substr($match, 10, -2);  // strip markup
-      return $ns;
+          $ns = explode('|',substr($match, 10, -2),2);  // strip markup
+          return array(trim($ns[0]),trim($ns[1]));
     }
     
  
@@ -38,7 +38,7 @@
                $renderer->info['cache'] = false;
     
                if ($mode == 'xhtml') {
-                       $cmb=$this->_makecombo($data);
+                       $cmb=$this->_makecombo($data[0]);
                        if ($cmb==$this->getLang('nooption')) {
                                $renderer->doc .=(!$this->getConf('addpage_hideACL'))?$cmb:'';
                                return true;
@@ -49,7 +49,15 @@
                    $renderer->doc .= $cmb;
                    $renderer->doc .= '<input class="edit" type="text" name="title" id="addnewpage_title" size="20" maxlength="255" tabindex="2" />';
                        $renderer->doc .= '<input type="hidden" name="do" id="do" value="edit" />';
-                   $renderer->doc .= '<input class="button" type="submit" value="'.((@$this->getLang('okbutton'))?$this->getLang('okbutton'):'ok').'" tabindex="3"  onclick="setName();" />';
+                        if(strlen($data[1])>1) {
+                         $t=explode("&",$data[1]);
+                         foreach($t as $value) {
+                           $parameter=explode("=",$value,2);
+                           $renderer->doc .= '<input type="hidden" name="'.htmlentities(trim($parameter[0]),ENT_QUOTES).'" id="'.htmlentities(trim($parameter[0]),ENT_QUOTES).'" value="'.htmlentities(trim($parameter[1]),ENT_QUOTES).'" />';
+                         }
+                       }
+
+                       $renderer->doc .= '<input class="button" type="submit" value="'.((@$this->getLang('okbutton'))?$this->getLang('okbutton'):'ok').'" tabindex="3"  onclick="setName();" />';
                    $renderer->doc .= '</form>';
                    $renderer->doc .= '</div>';