Simple SQL Connection function for PHP

function sqlcon($sql){
/*Erklärung des Return Arrays sqlcon
 * 1. Dimension:
 *              0 = Anzahl der Zeilen
 *              1 = Zeilenausgabe
 *                      0 = Zeile 1
 *                              0 = Spalte 1
 *                              1 = Spalte 2
 *      2 = AutoInkrement ID
 * 00 Mysql Error
 * 01 Connection Error
 * 02 SqL Syntax Error
 *
 */
    global $mysrv,$myusr,$mypass,$mysqldb,$debug;
    $conn = new mysqli($mysrv,$myusr , $mypass,$mysqldb);
    $trans=array();
    // check connection
    if ($conn->connect_error) {
        trigger_error('Database connection failed: '  . $conn->connect_error, E_USER_ERROR);
    }
    $rs=$conn->query($sql);
    $id=$conn->insert_id;
    if($rs === false) {
     trigger_error('Wrong SQL: ' . $sql . ' Error: ' . $conn->error, E_USER_ERROR);
        } else {
            $anz=(is_object($rs))?$rs->num_rows:0;
            $i=0;
            if($anz>0){
            while ($row = $rs->fetch_assoc()) {
         $arr[$i] = $row;
                $i++;
            }
            }else{
                $arr=array();
            }
            $trans[0]=$anz;
            $trans[1]=$arr;
            $trans[2]=$id;
            $conn->close();
            return $trans;
    }
}