Simpler MODX Sibling Nav for all children with just previous and next output

modx-siblingnav

[[!siblingNav? &parents=`4` &limit=`4` &sortBy=`{"publishedon":"DESC"}` &prevTpl=`mxt.prevTpl` &nextTpl=`mxt.nextTpl`]]

<ul class="clearfix">[[+sn.prev]][[-+sn.prevlinks]][[-+sn.nextlinks]][[+sn.next]]</ul>
                
                
PREV

<li>[[+_isactive:is=`1`:then=`<a href="[[~[[+id]]]]">&laquo; [[+pagetitle]]</a>`:else=` &laquo; `]]</li>                

//////

/*
* Wayne Roddy (wayne@modx.com)
* Dec 1 2016
* Snippet for retrieving children with a {Specific} Template 
* Creating an Array and finding the siblings for Placeholders
* Used on the News Item Page
*
* [[GetSiblingstoPH? &tpl=`15`]]
*/

$siblings = [];

$activeId = $modx->resource->get('id');
$parentId = $modx->resource->get('parent');
$tpl = $modx->getOption('tpl', $scriptProperties);

$q = $modx->newQuery('modResource');
$q->where(array('published'=>'1','parent'=>$parentId,'template'=>$tpl,'class_key'=>'modDocument'));
$q->sortby('publishedon','DESC');
$resources = $modx->getCollection('modResource',$q);

foreach($resources as $r) { 
  $id = $r->get('id');
  $title = $r->get('pagetitle');
  
  $s = array("id" => $id,"title" => $title);
  
  array_push($siblings, $s);
}  

//print_r($siblings);

function activeKey($data, $field, $value){
   foreach($data as $key => $item){
      if ( $item[$field] === $value )
         return $key;
   }
   return false;
}
$active_key = activeKey($siblings,'id',$activeId);

//make previous html
$prevkey = $active_key - 1;
//$modx->log(modX::LOG_LEVEL_ERROR,'previous key: ' . $prevkey);
if($prevkey >= 0){
  $prevurl = $modx->makeUrl($siblings[$prevkey]["id"]);
  $prevChunk = $modx->getChunk("sibling-prev", array("url"=>$prevurl,"title"=>$siblings[$prevkey]["title"]));
} else {
  $prevChunk = $modx->getChunk("sibling-empty", array());
}

//make next html
$nextkey = $active_key + 1;
//$modx->log(modX::LOG_LEVEL_ERROR,'next key: ' . $nextkey);
if($nextkey < count($siblings)){
  $nexturl = $modx->makeUrl($siblings[$nextkey]["id"]);
  $nextChunk = $modx->getChunk("sibling-next", array("url"=>$nexturl,"title"=>$siblings[$nextkey]["title"]));
} else {
  $nextChunk = $modx->getChunk("sibling-empty", array());
}

$modx->setPlaceholders(array('Next' => $nextChunk),'sibling.');
$modx->setPlaceholders(array('Prev' => $prevChunk),'sibling.');

what was the issue you were having with this @dubrod?