PHP OOP - return arrays into class(?) - php

Question

I'm trying to use OOP ways. I have bunch of methods that return same format of array. I want to guarantee that user of this class knows what will be returned. How would I go about doing that? Please forgive me as I'm not sure of correct terminologies to describe my problem.
class myModel {
public function getArray1(){
$data = array();
$id = array();
....
return array('data'=>$data, 'id'=>$id); <== HOW TO GUARANTEE RETURN FORMAT
};
public function getArray2(){
$data = array();
$id = array();
....
return array('data'=>$data, 'id'=>$id); <== HOW TO GUARANTEE RETURN FORMAT
};
public function getArray3(){
$data = array();
$id = array();
....
return array('data'=>$data, 'id'=>$id); <== HOW TO GUARANTEE RETURN FORMAT
};
}

Answer 1

You can try to define additional class for returning value:
class returnArray {
$data = array();
$id = array();
function construct($data,$id) {
$this->data = $data;
$this->id = $id;
}
}
//...
public function getArray1(){
$data = array();
$id = array();
....
return new returnArray('data'=>$data, 'id'=>$id);
};
Then You can add accessors to the returnArray class or leave it as public if You want or even implement __toString() if necessary.