Getting blank pages after database caching turned on

<?php
if (!isset($nom)){
 $nom = '';
   }
return $nom.' © '.date(Y);

<?php
$diapo=explode(",",$modx->resource->getTVValue('tri'));
return '
<standard>
  <div id="slider">
  <script type="text/javascript">
  $(document).ready(function(){
    $("#featured > ul").tabs({fx:{opacity: "toggle"}}).tabs("rotate", 5000, true);
  });
</script>
<div id="featured" >

  <!-- First Content -->
  <div id="fragment-1" class="ui-tabs-panel" style="">
    [[*slider_photo_'.$diapo[0].']]
    <div class="info" >
    <h2><a href="[[~[[*slider_lien_'.$diapo[0].']]]]" >[[*slider_titre_'.$diapo[0].']]</a></h2>
      <p>[[*slider_accroche_'.$diapo[0].']] <a href="[[~[[*slider_lien_'.$diapo[0].']]]]" >Lire la suite...</a></p>
    </div>
  </div>
  <!-- Second Content -->
  <div id="fragment-2" class="ui-tabs-panel ui-tabs-hide" style="">
    [[*slider_photo_'.$diapo[1].']]
    <div class="info" >
    <h2><a href="[[~[[*slider_lien_'.$diapo[1].']]]]" >[[*slider_titre_'.$diapo[1].']]</a></h2>
    <p>[[*slider_accroche_'.$diapo[1].']] <a href="[[~[[*slider_lien_'.$diapo[1].']]]]" >Lire la suite...</a></p>
    </div>
  </div>
    <!-- Third Content -->
    <div id="fragment-3" class="ui-tabs-panel ui-tabs-hide" style="">
    [[*slider_photo_'.$diapo[2].']]
    <div class="info" >
    <h2><a href="[[~[[*slider_lien_'.$diapo[2].']]]]" >[[*slider_titre_'.$diapo[2].']]</a></h2>
    <p>[[*slider_accroche_'.$diapo[2].']] <a href="[[~[[*slider_lien_'.$diapo[2].']]]]" >Lire la suite...</a></p>
      </div>
  </div>
    <!-- Fourth Content -->
    <div id="fragment-4" class="ui-tabs-panel ui-tabs-hide" style="">
    [[*slider_photo_'.$diapo[3].']]
    <div class="info" >
    <h2><a href="[[~[[*slider_lien_'.$diapo[3].']]]]" >[[*slider_titre_'.$diapo[3].']]</a></h2>
    <p>[[*slider_accroche_'.$diapo[3].']] <a href="[[~[[*slider_lien_'.$diapo[3].']]]]" >Lire la suite...</a></p>
      </div>
  </div>
    <ul class="ui-tabs-nav">
      <li class="ui-tabs-nav-item ui-tabs-selected" id="nav-fragment-1"><a href="#fragment-1">[[*slider_photo_'.$diapo[0].']]<span>[[*slider_titre_'.$diapo[0].']]</span></a></li>
    <li class="ui-tabs-nav-item" id="nav-fragment-2"><a href="#fragment-2">[[*slider_photo_'.$diapo[1].']]<span>[[*slider_titre_'.$diapo[1].']]</span></a></li>
      <li class="ui-tabs-nav-item" id="nav-fragment-3"><a href="#fragment-3">[[*slider_photo_'.$diapo[2].']]<span>[[*slider_titre_'.$diapo[2].']]</span></a></li>
      <li class="ui-tabs-nav-item" id="nav-fragment-4"><a href="#fragment-4">[[*slider_photo_'.$diapo[3].']]<span>[[*slider_titre_'.$diapo[3].']]</span></a></li>
  </ul></div>

  </div><!--fin slider -->
</standard>

<!--Mobile-->
<mobile>
</div><!-- fin classe contenu-->
<div class="smenu">Actualité</div>
  <div class="contenu">                                                                                                    
    <div class="menu_smenu">
    <ul>
    <li><a href="[[~[[*slider_lien_'.$diapo[0].']]]]" title="[[*slider_titre_'.$diapo[0].']]" >[[*slider_titre_'.$diapo[0].']]</a>
<span class="pt_txt_ita">[[*slider_accroche_'.$diapo[0].']]</span></li>
    <li><a href="[[~[[*slider_lien_'.$diapo[1].']]]]" title="[[*slider_titre_'.$diapo[1].']]" >[[*slider_titre_'.$diapo[1].']]</a>
<span class="pt_txt_ita">[[*slider_accroche_'.$diapo[1].']]</span></li>
    <li><a href="[[~[[*slider_lien_'.$diapo[2].']]]]" title="[[*slider_titre_'.$diapo[2].']]" >[[*slider_titre_'.$diapo[2].']]</a>
<span class="pt_txt_ita">[[*slider_accroche_'.$diapo[2].']]</span></li>
    <li><a href="[[~[[*slider_lien_'.$diapo[3].']]]]" title="[[*slider_titre_'.$diapo[3].']]" >[[*slider_titre_'.$diapo[3].']]</a>
<span class="pt_txt_ita">[[*slider_accroche_'.$diapo[3].']]</span></li>
    </ul>
  </div>
</div><!-- fin classe contenu-->
</mobile>  
';

<?php
//Snippet name: limitWords
//Parametres: &chaine (string) - &max (number of chars)
//Example: [[!limite? &chaine=`[[*longtitle]]` &max=`10`]]
if (isset($chaine, $max)){
 if (strlen($chaine) > $max) {
 $chaine = substr($chaine, 0, $max);
 $espace = strrpos($chaine, " ");
 $chaine = substr($chaine, 0, $espace)."...";
}
}
return $chaine;

<p class="texte_derniere_nouvelle">[[!limitWords? &chaine=`[[+introtext]]` &max=`202`]]</p>

[[!getResources? &parents=`27` &tpl=`derniere_nouvelle` &limit=`1`]]