如何在Codeigniter中基于手机号码从两个表中获取结果

Question

Here i have two tables, i want write a select results from that two tables based on mobile number.

First Table

new_staff

staff_id              firstName        Mobile          userType

  1                  Soupranjali       9986125566       Teacher
  2                  Sujata            8553880306       Teacher

Second Table

new_student

student_id           first_Name        fatherMobile        user_type

  1                  janarthan         8553880306         Student
  2                  Santanu           8277904354         Student

here 8553880306 both table available so i need output like this

Expected Results

    {
  "status": "Success",
  "Profile": [
    {
      "staff_id": "2",
      "firstName": "Sujata",
      "userType" : "Teacher"
    },
    {
      "student_id": "1",
      "firstName": "janarthan",
      "user_type" : "Student"
    },
  ]
}

So tried like this but i unable to get the answer, so please anyone help me,

my model

 public function android_memberList($mobile)
            {
                $this->db->select('new_staff.staff_id, new_staff.firstName, new_staff.userType, new_student.student_id, new_student.first_Name, new_student.user_type');
                //$this->db->select('*');
                $this->db->from('new_staff');
                $this->db->join('new_student', 'new_student.fatherMobile  = new_staff.Mobile');
                $query = $this->db->get();

                # result_array is used to convert the data into an array
                $result = $query->result_array(); // or  $result = $query->result_array()[0]; 
                echo json_encode($query);
            }

Updated Answer

     [
  {
    "staff_id": "2",
    "firstName": "Sujata",
    "userType": "Teacher",
    "student_id": "1",
    "first_Name": "janarthan",
    "user_type": "Student"
  }
]

Update answer 2

    [
  [
    {
      "staff_id": "2",
      "firstName": "Sujata",
      "userType": "Teacher",
      "student_id": "1",
      "first_Name": "janarthan",
      "user_type": "Student"
    }
  ]
]

Answer 1

You need to check datatype of mobile column on both table.

They must have same datatype to perform join operation.

Answer 2

You can try this

public function android_memberList($mobile)
{
    $this->db->select('new_staff.staff_id, new_staff.firstName, new_staff.userType, new_student.student_id, new_student.firstName, new_student.user_type');
    //$this->db->select('*');
    $this->db->from('new_staff');
    $this->db->join('new_student', 'new_student.fatherMobile  = new_staff.Mobile');
    $query = $this->db->get();

    # result_array is used to convert the data into an array
    $result = $query->result_array(); // or  $result = $query->result_array()[0]; 
    echo json_encode($result);
}

When you use result_array it will come as ZERO indexed array. You can choose that or you can remove it as using comment on above code