php - What happens to inserted records when a model function returns before it reaches to rollback or complete? -

i trying test transaction management in codeigniter. below method function in model class. if update_user_company_id method returns false, wrapper method save_user_and_company returns. in case, because method returns before reaches

$this->db->trans_complete(); 

call, changes made save_company , delete_company_requests methods rolled back. want.

but want learn instead of calling

$this->db->rollback(); 

i directly return method. approach safe? there possibility may encounter lock or other problem in future?

function save_user_and_company($user, $company_request) {      $result[statu] = error;     $this->db->trans_start();      $company = $this->companies_dao->save_company($company_request->company_name, $user->id);     if (!$company) {         $result[message] = company_save_error;         return $result;     }      $company_request_result = $this->company_requests_model->delete_company_requests($company_request->id);     if (!$company_request_result) {         $result[message] = company_request_delete_error;         return $result;     }      $user_update = $this->users_dao->update_user_company_id($user->id, $company->id);     if (!$user_update) {         $result[message] = user_update_error;         return $result;     }     $this->db->trans_complete();      $result[statu] = success;     $result[message] = successful;     return $result; } 

thanks in advance!

did try this....

following code returns true if transaction completes successfully.otherwise rollback transaction , returns false.hope lot..

function save_user_and_company($user, $company_request) {      $this->db->trans_begin(); //begins transaction      //performs transaction operations     $company = $this->companies_dao->save_company($company_request->company_name, $user->id);     $company_request_result = $this->company_requests_model->delete_company_requests($company_request->id);     $user_update = $this->users_dao->update_user_company_id($user->id, $company->id);      //check whether transaction fails      if ($this->db->trans_status() === false)     {       $this->db->trans_rollback();       $status = false;     }    else     {       $this->db->trans_commit();       $status = true;     }      return $status; }