Need help with this function

I am trying to make function that opens a db connection and am having trouble.

The function will be used to decide which database to connect to give the value of the $db var.

My code so far is

$db = 1;
ini_set('display_errors',1);
error_reporting(E_ALL|E_STRICT);

global $d;
global $sd;
global $conerror;

function getdb($db=1){
$dbh = 'localhost';
$dbu = 'dbuser';
$dbp = 'sbpass';
$dbn = 'dbname';


$conerror = true;
if($db == 1){
$d = mysqli_connect( $dbh , $dbu , $dbp) or $conerror = 'failure to connect';
$sd = mysqli_select_db( $d, $dbn ) or $conerror = 'can not select db';//die("Error getting db: <br><br>".mysql_error());
}

if (mysqli_connect_errno()) {
  $conerror = false;;
}
return $conerror;
}

$getdb = getdb($db);
if ($getdb){
$q = "select *  from projects where pid='14' order by pid limit 1 ";
$result = mysqli_query($d, $q, MYSQLI_USE_RESULT) ;
while ( $grow = mysqli_fetch_assoc($result) ) {
$tz = $grow['tz'];

echo $tz;
}

  //do stuff here

}

Code (markup):

Any ideas as to what I am doing wrong or have a better solution all together?

Thanks in advance.

 

I don't get your real problem? please explain in full!

 

Nevermind I figured it out!

 

If you're diving into OO PHP , I would strongly suggest (only if u r open to suggestions) to use mysqli , it is more complex than mysql_connect but, it is efficient.