Exportar datos MySQL a .csv usando PHP

Prueba esto:

$rows = mysql_query("SELECT `name`, `gender` FROM TABLE");

while ($row = mysql_fetch_assoc($rows)) {

    if($row['gender'] == 1) {
        $row['gender'] = 'Male'; 
    } else {
        $row['gender'] = 'Female'; 
    }

    // Or ternary condition
    // $row['gender'] = ($row['gender'] == 1 ? 'Male' : 'Female');

    fputcsv($output, $row);
}