Espace des numéros dans l'argent PHP

gistfile1.txt

function formatMoney($number, $fractional=false) { 
    if ($fractional) { 
        $number = sprintf('%.2f', $number); 
    } 
    while (true) { 
        $replaced = preg_replace('/(-?\d+)(\d\d\d)/', '$1,$2', $number); 
        if ($replaced != $number) { 
            $number = $replaced; 
        } else { 
            break; 
        } 
    } 
    return str_replace(',',' ',$number); 
}