php - How do I create a category tree, where subcategories can have multiple parents? -


i need create functions return array of categories , subcategories, subcategories can have more 1 parent. have tried solve problem maybe 6 days there's nothing on internet.

here code have created, doesn't work.

    private function getallsubs($category, $index, $parent = null)  {   $subs = $this->database->table('eshop_product_categoryo')   ->where('parent', $category->id);    $havesub = false;   foreach($subs $sub)   {     $havesub = true;      break;   }    if($havesub)   {    $maincategory = $this->database->table('eshop_product_categoryo')    ->where('category', $category->id);     $ismaincategory = true;    foreach($maincategory $main)    {     $ismaincategory = false;      break;    }     $ppp = 0;     if(!$ismaincategory)    {     $ppp = $parent;    }     $this->somearray[] = array    (     'name'  => $category->name,     'parent'  => $ppp,     'index' => $index,     'id'    => $category->id    );     foreach($subs $sub)    {     $ctgry = $this->database->table('eshop_product_category')     ->where('id', $sub->category)     ->fetch();     $this->getallsubs($ctgry, ($index+1), $sub->parent);    }   }  }

ok solved... ;-) here version

private function getallsubs($category, $index)  {   $subs = $this->database->table('eshop_product_categoryo')   ->where('otec', $category->id);    $hassub = false;   foreach($subs $sub){$hassub = true; break;}    if($hassub)   {    $this->somearray[] = array    (     'name'  => $category->name,     'index' => $index    );    foreach($subs $sub)    {     $parent = $this->database->table('eshop_product_category')     ->where('id', $sub->category)     ->fetch();     $this->getallsubs($parent, ($index + 1));    }   }   else   {    $this->somearray[] = array    (     'name'  => $category->name,     'index' => $index    );   }  }

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