json_encode utf-8 issue
===

I retrieve a mysqli-resultset from the database, comes from a utf-8 encoded table and then is inserted into an array:

    $json = array();
	
	$query = "select artikel_titel from tblArtikel";
	if($result = mysqli_query($link, $query))
	{
		while($line = mysqli_fetch_array($result, MYSQLI_NUM)) {
		array_push($json, $line);
	}
	echo json_encode($json);
		
The array is correctly built, [you can see it here][1]
At the bottom of the page you can see the error created by the json_encode. How can I fix this?

    Warning: json_encode(): Invalid UTF-8 sequence in argument in /customers/6/0/6/onezeromany.com/httpd.www/php/getArticles.php on line 13 Warning: json_encode(): Invalid UTF-8 sequence in argument in /customers/6/0/6/onezeromany.com/httpd.www/php/getArticles.php on line 13 Warning: json_encode(): Invalid UTF-8 sequence in argument in /customers/6/0/6/onezeromany.com/httpd.www/php/getArticles.php on line 13


  [1]: http://onezeromany.com/php/getArticles.php