php - Final element in foreach() not be compared -

i have given array such:

array ( [0] => array     (         [product_colour_sizes_id] => 31822         [product_colour_sizes_product_id] => 1495         [product_colour_sizes_option_value_colour_id] => 377         [product_colour_sizes_option_value_size_id] => 297         [quantity] => 999         [product_colour_sizes_name_sizes] => 6              [product_colour_sizes_name_colours] => grey     )  [1] => array     (         [product_colour_sizes_id] => 31823         [product_colour_sizes_product_id] => 1495         [product_colour_sizes_option_value_colour_id] => 377         [product_colour_sizes_option_value_size_id] => 295         [quantity] => 999         [product_colour_sizes_name_sizes] => 7              [product_colour_sizes_name_colours] => grey     )  [2] => array     (         [product_colour_sizes_id] => 31824         [product_colour_sizes_product_id] => 1495         [product_colour_sizes_option_value_colour_id] => 377         [product_colour_sizes_option_value_size_id] => 242         [quantity] => 999         [product_colour_sizes_name_sizes] => 8              [product_colour_sizes_name_colours] => grey     )  [3] => array     (         [product_colour_sizes_id] => 31825         [product_colour_sizes_product_id] => 1495         [product_colour_sizes_option_value_colour_id] => 377         [product_colour_sizes_option_value_size_id] => 296         [quantity] => 999         [product_colour_sizes_name_sizes] => 9              [product_colour_sizes_name_colours] => grey     )  [4] => array     (         [product_colour_sizes_id] => 31826         [product_colour_sizes_product_id] => 1495         [product_colour_sizes_option_value_colour_id] => 377         [product_colour_sizes_option_value_size_id] => 243         [quantity] => 999         [product_colour_sizes_name_sizes] => 10             [product_colour_sizes_name_colours] => grey     )  ) 

i have foreach() loop loops on above data , reduces down single array. loop here:

foreach ($product_combinations $key => $product_combination){      // set offiset key.     $offset_key = $key + 1;     if(array_key_exists($offset_key, $product_combinations)){         echo 'yes' . '<br>';     }      // check if array key exists.     if (array_key_exists($offset_key, $product_combinations)) {          // core logic.         if ($product_combinations[$offset_key]['product_colour_sizes_name_colours'] == $product_combinations[$key]['product_colour_sizes_name_colours']) {              $color = $product_combinations[$key]['product_colour_sizes_name_colours'];             $id = $product_combinations[$key]['product_colour_sizes_option_value_size_id'];             $sizes[$id] = $product_combinations[$key]['product_colour_sizes_name_sizes'];             $quantity = $product_combinations[$key]['quantity'];             $sizes['quantity'] = $quantity;              /* dont forget theses*/             $sizes['product_colour_sizes_id'] = $product_combination['product_colour_sizes_id'];             $sizes['product_colour_sizes_product_id'] = $product_combination['product_colour_sizes_product_id'];             $sizes['product_colour_sizes_option_value_colour_id'] = $product_combination['product_colour_sizes_option_value_colour_id'];             $sizes['product_colour_sizes_option_value_size_id' . $id_increment] =$product_combination['product_colour_sizes_option_value_size_id'];             $id_increment++;         }          // add sizes color array.         $colours[$color] = $sizes;      } // if (==)  } // foreach 

the problem loop not compare last indexed array. i've tried several iterations of logic no avail. last array not looping over.

[4] => array     (         [product_colour_sizes_id] => 31826         [product_colour_sizes_product_id] => 1495         [product_colour_sizes_option_value_colour_id] => 377         [product_colour_sizes_option_value_size_id] => 243         [quantity] => 999         [product_colour_sizes_name_sizes] => 10             [product_colour_sizes_name_colours] => grey     ) 

the outcome looping on data gives me result:

array ( [grey] => array     (         [297] => 6              [quantity] => 999         [product_colour_sizes_id] => 31825         [product_colour_sizes_product_id] => 1495         [product_colour_sizes_option_value_colour_id] => 377         [product_colour_sizes_option_value_size_id] => 297         [295] => 7              [product_colour_sizes_option_value_size_id1] => 295         [242] => 8              [product_colour_sizes_option_value_size_id2] => 242         [296] => 9              [product_colour_sizes_option_value_size_id3] => 296     )  ) 

however, want this, last element compared , included:

[grey] => array     (              [quantity] => 999         [product_colour_sizes_id] => 31825         [product_colour_sizes_product_id] => 1495         [product_colour_sizes_option_value_colour_id] => 377         [product_colour_sizes_option_value_size_id] => 297         [295] => 7              [product_colour_sizes_option_value_size_id1] => 295         [242] => 8              [product_colour_sizes_option_value_size_id2] => 242         [296] => 9              [product_colour_sizes_option_value_size_id3] => 296         [297] => 6         [product_colour_sizes_option_value_size_id4] => 243         [243] => 10      )  ) 

your problem lies here:

  // set offiset key.    $offset_key = $key + 1;       if(array_key_exists($offset_key, $product_combinations)){           echo 'yes' . '<br>';       } 

just yo start looping, add +1 $key, starting array position 1 instead of position 0 (your code search n+1 position, 1 greater max array elements).

you need change logic here.