Answers for "mysqli_query() expects parameter 1 to be mysqli, bool given in"

Warning: mysqli_fetch_all() expects parameter 1 to be mysqli_result, bool given in C:\newxammp\htdocs\learn\index.php on line 11

#where you are running mysqli_query , add 'or die( mysqli_error($db)'
#e.g
$sql = "SELECT * FROM users";
$result = mysqli_query($db, $sql) or die( mysqli_error($db));
#$db being the variable holding the connection to db

mysqli_select_db expects 2 parameters

//do the correction as below:

$conn = mysqli_connect('localhost', 'root', '');
//the first thing that you have to pass connection variable in the select_db as first parameter. as below.

mysqli_select_db($conn,'altislife-dev');
//also you have to pass connection variable in mysqli_query() as first parameter as given below.

$records=mysqli_query($conn,$sql);

mysqli_query() expects parameter 1 to be mysqli, string given

<?

$qry = mysqli_query($connection, $query);
// $connection: database connection
// $query: your query