[Solved] remove subarray with php

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the problem is you only unset a variable which has a copy of the value, you need to unset the corresponding element in the array.

public function negativeKeywordsFilter($products, $negative_keywords){
  $nk=explode(',',$negative_keywords);
  foreach ($products['productItems'] as $key1 => $product){
    foreach ($product as $key2 => $item){
        foreach ($nk as $word){
        if (stripos($item['name'],$word) !== false){
        unset($products['productItems'][$key1][$key2]);                       
    }

  }
}

}
 return $products;
}

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solved remove subarray with php