Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'and (Nivel='1' or Nivel='3' or Nivel='2' or Nivel='4' ) Order ' at line 6 in /home/zonacomercialcom/public_html/busqueda.php:54 Stack trace: #0 /home/zonacomercialcom/public_html/busqueda.php(54): mysqli_query(Object(mysqli), 'select NombreCl...') #1 {main} thrown in /home/zonacomercialcom/public_html/busqueda.php on line 54