Warning: mysqli_query() expects parameter 1 to be mysqli, null given in

Question

I am trying to build a simple custom CMS, but I\'m getting an error:

Warning: mysqli_query() expects parameter 1 to be MySQLi, null given in

Answer 1

As mentioned in comments, this is a scoping issue. Specifically, $con is not in scope within your getPosts function.

You should pass your connection object in as a dependency, eg

function getPosts(mysqli $con) {
    // etc

I would also highly recommend halting execution if your connection fails or if errors occur. Something like this should suffice

mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT); // throw exceptions
$con=mysqli_connect("localhost","xxxx","xxxx","xxxxx");

getPosts($con);