function pdo_mysql($sql){

    $host = *;
    $user = *;
    $pass = *;
    $db   = *;

    try {
        $PDO = new PDO( 'mysql:host=' . $host . ';dbname=' . $db, $user, $pass );
    }
    catch ( PDOException $e ) {
        echo 'MySQL error: ' . $e->getMessage(); exit;
    }

    $result = $PDO->query( $sql );

    if (is_array($result)){
        $row = $result->fetchAll( PDO::FETCH_ASSOC );
    }else{
        $row = $result;
    }

    return $row;

}

$sql = "...";
$return = pdo_mysql($sql);

foreach ($return as $row){

    // Execute some functions and show the results in a table (using datatables plugin)

}