如果查询为空，mysqli_query会返回什么

Question

I am making a search condition where i see if the $result=mysqli_query($dbconnect,$someQuery);

if($result==false) orif($result==null) but it doesn't respond to a boolean as a compared value. although if the condition is satisfied, the if($result==true) condition is called.

this is my query

    $someQuery="select * from books where bookid = '$id'";

what condition checks if the mysql query failed or returned nothing?

Answer 1

Please search for it on google, this should help you http://php.net/manual/en/mysqli.query.php by the way, mysqli_query returns FALSE if the statement fails, or a mysqli_result object which can used to associate arrays or other stuff

reference: http://php.net/manual/en/mysqli.query.php as written before