php - Supplied object, but invalid argument error in foreach loop appears -


i getting message: invalid argument supplied foreach() when run following code:

foreach($combination $combi){          var_dump($combi);          $tarr[]=$variant_options[$combi->product_variant_option_value_id];                         }

when var_dump $combination, object(stdclass)#60 (8)//and whole content. what's not okay it?

i can post content of $combination, it's lot of it.

any idea should do?

thanks

edit: var_dump($combination) output:

    array(8) { [0]=> object(stdclass)#60 (8) { ["id"]=> string(1) "1" ["product_variant_option_id"]=> string(1) "1" ["product_variant_option_value_id"]=> string(1) "1" ["sku"]=> string(0) "" ["price"]=> string(4) "0.00" ["saleprice"]=> string(4) "0.00" ["quantity"]=> string(1) "0" ["weight"]=> string(1) "0" }     [1]=> object(stdclass)#73 (8) { ["id"]=> string(1) "2" ["product_variant_option_id"]=> string(1) "1" ["product_variant_option_value_id"]=> string(1) "4" ["sku"]=> string(0) "" ["price"]=> string(4) "0.00" ["saleprice"]=> string(4) "0.00" ["quantity"]=> string(1) "0" ["weight"]=> string(1) "0" } }

edit2:

 foreach($variants $variant){          $combination=$this->product_model->getvariationcombination($variant->id);          $tarr=array();          foreach($combination $combi){              $tarr[]=$variant_options[$combi->product_variant_option_value_id];          }

where getvariationcombination is: 

public function getvariationcombination($product_variant_id){             $query=$this->db->get_where('product_variant_combination',array('product_variant_option_id'=>$product_variant_id));             $variants=array();             foreach ($query->result() $row)             {                 $variants[]=$row;             }              if(count($variants)>0) return $variants;             return null;          }

to iterate on object have implement http://www.php.net/manual/en/class.iterator.php or http://www.php.net/manual/en/class.generator.php or http://www.php.net/manual/en/class.iteratoraggregate.php


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