public function changesitename($argument2, $not_required_argument2 = 1) {			require ('inc/config.php');			$currentsitename = $mysqli->query("SELECT title FROM page WHERE id=1");			return '			<b>Admin > Verander site naam</b></br>			<hr style="margin-top:0px;" width="950px" color="purple">			<form action="?action=changesitenamesucces" method="post">			Nieuwe site naam: <input type="text" style="width:300px;" value="'. $currentsitename .'" name="sitename"><br>			<input type="submit" value="Verander site naam">			</form>			';						//return DONT echo			//return array("example" => 1);		}

Catchable fatal error: Object of class mysqli_result could not be converted to string in C:\Users\coolb_000\Desktop\New folder (2)\root\admin\class\housekeeping.php on line 35

require ('inc/config.php');
			
			$currentsiteauthor = $mysqli->query("SELECT author FROM settings");
			while($row = mysqli_fetch_array($currentsiteauthor))
			
			$currentsitetitle = $mysqli->query("SELECT title FROM settings");
			while($row = mysqli_fetch_array($currentsitetitle))

public function addpagesucces($argument3, $not_required_argument3 = 1) {
			require ('inc/config.php');
			$pagename = $_POST['pagename'];
			$pagecontent = $_POST['pagecontent'];
			$mysqli->query("INSERT INTO `page`(`title`, `content`, `menu`, `loggedin`, `admin`, `menutext`) VALUES ('$pagename','$pagecontent',0,0,0,0)");
			header('Location: index.php');
			
			//return DONT echo
			//return array("example" => 1);
		}