run same method multiple times

 
<?php
 
class article{
	
private $row;
 
public function __construct(){
 
require_once('connection.php'); 
mysql_select_db($db, $test);	
 
$query = "SELECT * FROM articles WHERE path = $_SESSION['path']";
$result = mysql_query($query, $test) or die(mysql_error());
$this->row = mysql_fetch_array($result);
 

}
 
public function process($field) {
 
if($field == 'tool'){
echo $this->row['path'];
}
else if($field == 'test'){
echo $this->row['title'];
}
 
 
}
 

}
 
$obj = new article();
$obj->process('tool');
$obj = new article();
$obj1->process('test');
 
?>