<br /> <b>Warning</b>: mysqli_fetch_array() expects parameter 1 to be mysqli_result, object given in <b>D:\APPS\XAMP\files\htdocs\messenger\getMessages.php</b> on line <b>17</b><br /> code example

Example: 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