Using a database class in my user class

Question

In my project I have a database class that I use to handle all the MySQL stuff. It connects to a database, runs queries, catches errors and closes the connection.

Now I

Answer 1

I think the better aproach would be to create the database class that instatiate right away on its own on a database.php and then include it on user.php. then every time you create a function that needs a database, you globalise the database object.

Check this. databse.php

open_connection();
    $this->magic_quotes_active = get_magic_quotes_gpc();
$this->real_escape_string_exists = function_exists( "mysql_real_escape_string" );
 }

 public function open_connection() {
     $this->connection    = mysql_connect(DBHOST,DBUSER,DBPASS);
     if(!$this->connection){
         die("Could not Connect ".mysql_error());
     }else{
         $db = mysql_select_db(DB,  $this->connection);
     } 
 }

 public function close_connection(){
     if(isset($this->connection)){
         mysql_close($this->connection);
         unset($this->connection);
     }
 }

 public function query($sql){
     $this->last_query   =   $sql;
     $results            = mysql_query($sql, $this->connection);
     $this->comfirm_query($results);
     return $results;
 }

 private function comfirm_query($results){
     if(!$results){
         $output     =   "Query Failed " .mysql_error()."
";
         $output    .=    "Last Query: " .  $this->last_query;
         die($output);
     }
 }

 public function escape_value($value){

if( $this->real_escape_string_exists ) { 
    if($this->magic_quotes_active ) { $value = stripslashes( $value ); }
    $value = mysql_real_escape_string( $value );
} else { 
    if( !$this->magic_quotes_active ) { $value = addslashes( $value ); }
}
return $value;
 }

 public function fetch_array($results){
     return mysql_fetch_array($results);         
 }

 public function num_row($results){
     return mysql_num_rows($results);
 }

 public function insert_id(){
     return mysql_insert_id($this->connection);
 }

 public function affected_row(){
     return mysql_affected_rows();
 }
}
$database   =   new MysqlDb();

?>

here is the user.php

 query($sql);
    $object_array = array();
    while($row = $database -> fetch_array($results)){
        $object_array[] = self::instantiate($row);
    }
    return $object_array;
}

public static function instantiate($row){
     $user   =   new self;
     foreach($row as $attribute => $value){
         if($user -> has_attribute($attribute)){
             $user -> $attribute = $value;
         }
     }
     return $user;
}

private function has_attribute($attribute){
    $object_vars = get_object_vars($this);
    return array_key_exists($attribute, $object_vars);

}
}

?>