Предупреждение: mysqli_query() ожидает параметр 1, чтобы быть mysqli, то в этом случае мы дали предупреждение: mysqli_fetch_assoc() ожидает параметр 1, чтобы быть mysqli_result, нуль дается в

After submitting something through my form I get the welcome part and then the mysql connection error because mysql is off, it goes away when I turn it on and then the boolean error. "Warning: mysqli_query() expects parameter 1 to be mysqli, boolean given in /storage/ssd3/691/11050691/public_html/signin.php on line 255

Warning: mysqli_query() expects parameter 1 to be mysqli, boolean given 
in /storage/ssd3/691/11050691/public_html/signin.php on line 255
Warning: mysqli_fetch_assoc() expects parameter 1 to be mysqli_result, 
null given in /storage/ssd3/691/11050691/public_html/signin.php on line 
256
I have code in php and mysql,it work on localhost but it didn't work in the web ,always the computer show me the warning of mysqli and it seems that the program can't connect to the database and this the code:

the connection code:

<?php 
$db=mysqli_connect("localhost","id11050691_kimo","025586381") or die 
("Couldn't connect to Mysql");
$db=mysqli_select_db($db,"id11050691_daowat_db") or die ("Couldn't select 
database");

//time formate
function formatDate($date){
    return date('F j, Y, g:i a', strtotime($date));
}
 ?>

the code wich I have problem with :

//getting daowat post photo
$getposts = mysqli_query($db,"SELECT * FROM daowat WHERE photos != '' 
ORDER BY  RAND()");
$row = mysqli_fetch_assoc($getposts);
$photos_db = $row['photos'];
$photosrow = "./userdata/daowat_pics/".$photos_db;

I don't understand why the $db work like booleen,and I don't know what should I do for the $db comes work like a paramter and for the program be mysqli. I don't know if the problem is in the database or the the program, and I didn't find solution for it,so please where the problem and how can I solve it?