how do I make this function a class? - php

Question

i've been creating functions for too long without taking my code to 'classes'.
I learn well through example and I just wanted to convert this simple function into a class so I can compare something I know with something I don't...
Take the following function:
function affiliateName($affiliateID) {
$sql = 'SELECT * FROM affiliates WHERE uID="' . $affiliateID . '" ';
$res = mysql_query($sql);
$row = mysql_fetch_array($res);
$affiliateName = $row['firstName'] . ' ' . $row['lastName'];
return $affiliateName;
}
And how would I make that a class?

Answer 1

<?php
class AffiliateModel
{
public function first($id)
{
$sql = 'SELECT *, CONCAT(firstName, ' ', lastName) AS qualifiedName FROM affiliates WHERE uID="' . $id . '" LIMIT 1';
$res = mysql_query($sql);
return mysql_fetch_object($res);
}
}
$model = new AffiliateModel();
$a = $model->first($id);
echo $a->qualifiedName;
?>

Answer 2

Hope it helps
<?php
class affiliate{
// fields or properties
public $name = '';
public $id = 0;
// constructor
public function affiliate($id = 0){
$this->set_ID($id);
}
// methods
public function set_ID($id){
return $this->id = $id;
}
public function get_Name(){
if($this->name != ""){
$sql = 'SELECT * FROM affiliates WHERE uID="' . $this->id . '" ';
$res = mysql_query($sql);
$row = mysql_fetch_array($res);
return $this->name = $row['firstName'] . ' ' . $row['lastName'];
}else{
return $this->name;
}
}
}
// Example:
$currentAffiliate = new affiliate(153);
echo $currentAffiliate->name;
?>

Answer 3

I prefer the following design as it is the simplest to use:
class affiliates {
static function load($id) {
return new self(intval($id));
}
private function __construct($id) {
$query = "SELECT * FROM affiliates WHERE id = " . intval($id);
$result = mysql_query($query);
// TODO: make sure query worked
foreach(mysql_fetch_assoc($result) as $field => $value)
$this->$field = $value;
}
// composite fields - made by combining and/or re-formatting other fields
function qualifiedName() {
return $this->firstName . ' ' . $this->lastName;
}
function properName() {
return $this->lastName . ', ' . $this->firstName;
}
}
$a = affiliates::load(22);
// all db fields are available as properties:
echo $a->id; // 22
echo $a->firstName; // Fred
echo $a->lastName; // Smith
// composite fields are methods
echo $a->qualifiedName(); // Fred Smith
echo $a->properName(); // Smith, Fred
// to get a single field from a particular person
echo affiliates::load(72)->qualifiedName();