PHP and Mysqli getting value of a count(distinct()) query

Question

I have a db table in mysql called gsm, with 2 columns, LAC and NAME.

So I am trying to count how many different LAC are stored in the DB and retrieve a php value to furt

Answer 1

//conection:
$link = mysqli_connect("www.mywebsite.com","user","password","dataname") or die("Error " . mysqli_error($link));

//consultation:
$query = "SELECT COUNT(DISTINCT alias) as visitors FROM Visits where time BETWEEN timestamp(DATE_SUB(NOW(), INTERVAL 1 HOUR)) AND timestamp(NOW())";

//execute the query.
$result = $link->query($query) or die("Error in the consult.." . mysqli_error($link));
$row = mysqli_fetch_array($result);

//display information:
// The text to draw
$text = $row['visitors'];