Question

How could I build a unique array check each of the address fields.

E.g at the moment I get everything:

$stmnt = "SELECT `location_id`, `location_address1`, `location_address2`,
            `location_town`, `location_region`, `location_postcode`
          FROM locations WHERE user_id = '{$id}'";
$results = $db->fetchAll($stmnt);

    if(!empty($results ))  {
        foreach($results as $row) {
            if($unique){
                $value = $row['location_id'];
                $label = implode(", ", array(
                    'address1'      => $row['location_address1'],
                    'address2'      => $row['location_address2'],
                    'town'          => $row['location_town'],
                    'region'        => $row['location_region'],
                    'postcode'      => $row['location_postcode']
                ));
            }

I was thinking that where if($unique){ is you would check this address1, address2, etc exist in the temp array by searching this some how?

Answer 1

Using SELECT DISTINCT will allow you to bring back a unique set of results, excluding results that are dupliciates of another. You can even still use the ORDER BY if you intend to, but remember that with a DISTINCT selection, anything in the ORDER BY must also be in the SELECT statement.