[RESOLVED] PDO Problems...

[dclamp]

I made this function to give me a random string 5 characters long. It checks it against the database to confirm it is unique. I originally used this with the mysql_ functions, but switched to PDO for experience and for better programming. If you notice, i put in several echo's for debugging purposes.

When i run the code, it displays 12. It is stopping at my Try and not giving me any errors whatsoever. Any help?

function generateURL() {
    $length = 5;
    $characters = '23456789abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ';
    $string = "";    
    echo '1';
    for ($p = 0; $p < $length; $p++) {
        $string .= $characters[mt_rand(0, strlen($characters))];
    }
    echo '2';
    try {
        $STH = $DBH->prepare("SELECT uniqueurl FROM links WHERE uniqueurl = :uniqueurl");
        $STH->bindParam(':uniqueurl', $string);
        $STH->execute();
        $count = $STH->columnCount();
    }
    catch(PDOException $e) {  
        echo $e->getMessage() . "There was an error - Check Log";
        file_put_contents('errlog.txt', $e->getMessage() . "\r\n", FILE_APPEND);  
    }
    echo '3';
    if ($count == '0') {
        echo '4';
        return $string;
        
    } else {
        echo '5';
        generateURL();
    }
    
}