1 $db = new mysqli(‘localhost‘, ‘root‘, ‘‘, ‘w‘); 2 if($db->connect_error){ 3     die(‘Connect Error ( ‘.$db->connect_errno.‘ )‘.$db->connect_error); 4 } 5 echo ‘Connect OK.<br>‘;  6 $wtab = ‘w‘.rand(123,987); 7 $w = $db->query("CREATE TABLE $wtab (w int)"); 8 var_dump($w); 9 $w = $db->query("INSERT INTO $wtab VALUES(123)");10 var_dump($w);11 $w = $db->query("SELECT * FROM $wtab");12 var_dump($w);

Connect OK.D:\wamp64\www\wdb.php:21:boolean falseD:\wamp64\www\wdb.php:23:boolean trueD:\wamp64\www\wdb.php:25:object(mysqli_result)[3]  public ‘current_field‘ => int 0  public ‘field_count‘ => int 1  public ‘lengths‘ => null  public ‘num_rows‘ => int 2  public ‘type‘ => int 0