Getting a warning message mysqli_query expects parameter 1 to be mysqli, null given

Question

I keep getting this error from my code

Warning: mysqli_query() expects parameter 1 to be mysqli, null given in C:\\xampp\\htdocs\\citizenssuites\\site\\pages\\re         


        

Answer 1

You didn't call mysqli_connect first, or it failed. Set $connection to a valid connection first:

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$connection = mysqli_connect("hostname", "username", "password");
$result = mysqli_query($connection, ...);

Answer 2

The function mysqli_connection fails (or did you forget calling it?) and returns null which causes the error when you try to use $connection later on with mysqli_query.