Retrieve data from table with foreign key - php

Question

I was wondering how can I retrieve data from table3 with the use of 2 foreign keys. I will show you my tables first then try to explain what I am trying to do and how I am doing it.
Table1
ID Primary key
Table2
ID Foreign key
foodID Foreign Key
Table3
foodID Primary key
food
So I would first get the ID in the first table and compare it with the ID in the second table and get a foodID (note this relationship is a 1 to many, so I can have many foodIDs per ID). Then I want to output all foods by using the foodID. Heres an example of what I mean because I don't feel its too clear.
Say we have and ID = 1 and in this we have foodID = 1 and foodID = 2 and lastly foodID of 1 means food = pasta and foodID of 2 means food = mince meat. So in the end I would like to output both pasta and mince meat.
Heres the code I have so far, in the example above it will only output pasta and not mince meat:
public function getFood($id){
$data = $this->db->get_where('Table2', array('ID' => $id)); //Where $id is the ID in Table1
$Result = $data->result();
foreach($Result as $row){
$fID = $row->foodID;
}
$data = $this->db->get_where('Table3', array('foodID' => $fID));
return($data);
}
Heres my view where I output the food:
foreach($results as $row){
echo $row->food;
}

Answer 1

You just need to do a join:
public function getFood($id){
$this->db->select('*');
$this->db->from('Table3');
$this->db->join('Table2', 'Table2.ID = Table3.foodID');
$this->db->where('Table2.Id',$id);
$result = $this->db->get();
return $result;
}