PHP to handle 0 zero value

PHP

foreach($fields as $key => $field){ $value = $this->input->post($key); if($value == false){ if($value === "0"){ $data[$key] = $value; }elseif($field[1] == true){ $this->failed_response(0, $field[0] . ' 不正確'); }else{ $data[$key] = null; } }else{ $data[$key] = $value; } }

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foreach($fields as $key => $field){ $value = $this->input->post($key);   if($value == false){ if($value === "0"){ $data[$key] = $value; }elseif($field[1] == true){ $this->failed_response(0, $field[0] . ' 不正確'); }else{ $data[$key] = null; } }else{ $data[$key] = $value; } }