Pytanie poniekad z wordpressa ale z natury czysto z PHP. Chodzi o to ze taki kod:

[PHP] pobierz, plaintext 
$args_id_parent = array(
       'post_type' => 'produkty',
       'post_parent' => 0,
       'posts_per_page'=>-1,
       'post_status'=>'publish'
    );
    $query_id_parent=new WP_Query($args_id_parent);
    $where .= " AND (";
    while($query_id_parent->have_posts()):
      $query_id_parent -> the_post();
      $where .='post_parent = "'.get_the_ID().'" OR ';
    endwhile;
    $where=substr($where,0,-3); 
 
    $where .= ') AND (post_status="publish")';
    echo $where;
[PHP] pobierz, plaintext 

drukowany przez echo - pieknie generuje stringa ktory wyglada w moim przypadku tak:

[PHP] pobierz, plaintext 
AND (post_parent = "63" OR post_parent = "62" OR post_parent = "60" OR post_parent = "59" OR post_parent = "58" OR post_parent = "57" OR post_parent = "56" OR post_parent = "55" ) AND (post_status="publish")
[PHP] pobierz, plaintext 

I tak wlasnie wklejony string dziala poprawnie.

Natomiast problem pojawia sie gdy probuje to podpiac do zmiennej i pozniej wykonac juz w wordpressie - wygalda to tak:

[PHP] pobierz, plaintext 
  add_filter('posts_where', 'add_post_parents', 1);
  function add_post_parents($where){
    $args_id_parent = array(   
       'post_type' => 'produkty',
       'post_parent' => 0,
       'posts_per_page'=>-1,
       'post_status'=>'publish'
    );  
    $query_id_parent=new WP_Query($args_id_parent);
    $where .= " AND (";
    while($query_id_parent->have_posts()):
      $query_id_parent -> the_post();
      $where .='post_parent = "'.get_the_ID().'" OR ';
    endwhile;
    $where=substr($where,0,-3); 
 
 
    //$where= 'AND (post_parent = "63" OR post_parent = "62" OR post_parent = "60" OR post_parent = "59" OR post_parent = "58" OR post_parent = "57" OR post_parent = "56" OR post_parent = "55" ) AND (post_status="publish")';
    $where .= ') AND (post_status="publish")';
    return $where;  
  }
[PHP] pobierz, plaintext 

To co jest zakomentowane to to efekt jaki powinien wydrukowac powyzszy kod, ale pojawia sie jakis blad chyba bo nie dostaje zadnego wyniku - nie dostaje odpowiedzi z bledami... zapewne sa tam wylaczone. Wracajac do setna co tam moge zle robic ze wordpress mi tego nie przyjmuje a to co zakomentowane elegancko dziala...