PHP

Warning: mysqli_fetch_all() expects parameter 1 to be mysqli_result, bool given in C: ewxammphtdocslearnindex.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

Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result, string given in

mysqli_fetch_array($result) 

Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result, string given in

 mysqli_fetch_array($query)

mysqli_fetch_array() expects parameter 1 to be mysqli_result, bool given

For me, there was an error in my SQL query that was giving me this error. Check if the query that you are running works in your database management system!