Improvement to Rafael M. Salvioni's solution for money_format on Windows: when no currency symbol is selected, in the formatting, the minus sign was also lost when the locale puts it in position 3 or 4. Changed $currency = '';  to: $currency = $cprefix .$csuffix;
function money_format($format, $number) {
        $regex = '/%((?:[\^!\-]|\+|\(|\=.)*)([0-9]+)?' .
                '(?:#([0-9]+))?(?:\.([0-9]+))?([in%])/';
        if (setlocale(LC_MONETARY, 0) == 'C') {
            setlocale(LC_MONETARY, '');
        }
        $locale = localeconv();
        preg_match_all($regex, $format, $matches, PREG_SET_ORDER);
        foreach ($matches as $fmatch) {
            $value = floatval($number);
            $flags = array(
                'fillchar' => preg_match('/\=(.)/', $fmatch[1], $match) ?
                        $match[1] : ' ',
                'nogroup' => preg_match('/\^/', $fmatch[1]) > 0,
                'usesignal' => preg_match('/\+|\(/', $fmatch[1], $match) ?
                        $match[0] : '+',
                'nosimbol' => preg_match('/\!/', $fmatch[1]) > 0,
                'isleft' => preg_match('/\-/', $fmatch[1]) > 0
            );
            $width = trim($fmatch[2]) ? (int) $fmatch[2] : 0;
            $left = trim($fmatch[3]) ? (int) $fmatch[3] : 0;
            $right = trim($fmatch[4]) ? (int) $fmatch[4] : $locale['int_frac_digits'];
            $conversion = $fmatch[5];
            $positive = true;
            if ($value < 0) {
                $positive = false;
                $value *= -1;
            }
            $letter = $positive ? 'p' : 'n';
            $prefix = $suffix = $cprefix = $csuffix = $signal = '';
            $signal = $positive ? $locale['positive_sign'] : $locale['negative_sign'];
            switch (true) {
                case $locale["{$letter}_sign_posn"] == 1 && $flags['usesignal'] == '+':
                    $prefix = $signal;
                    break;
                case $locale["{$letter}_sign_posn"] == 2 && $flags['usesignal'] == '+':
                    $suffix = $signal;
                    break;
                case $locale["{$letter}_sign_posn"] == 3 && $flags['usesignal'] == '+':
                    $cprefix = $signal;
                    break;
                case $locale["{$letter}_sign_posn"] == 4 && $flags['usesignal'] == '+':
                    $csuffix = $signal;
                    break;
                case $flags['usesignal'] == '(':
                case $locale["{$letter}_sign_posn"] == 0:
                    $prefix = '(';
                    $suffix = ')';
                    break;
            }
            if (!$flags['nosimbol']) {
                $currency = $cprefix .
                        ($conversion == 'i' ? $locale['int_curr_symbol'] : $locale['currency_symbol']) .
                        $csuffix;
            } else {
                $currency = $cprefix .$csuffix;
            }
            $space = $locale["{$letter}_sep_by_space"] ? ' ' : '';
            $value = number_format($value, $right, $locale['mon_decimal_point'], $flags['nogroup'] ? '' : $locale['mon_thousands_sep']);
            $value = @explode($locale['mon_decimal_point'], $value);
            $n = strlen($prefix) + strlen($currency) + strlen($value[0]);
            if ($left > 0 && $left > $n) {
                $value[0] = str_repeat($flags['fillchar'], $left - $n) . $value[0];
            }
            $value = implode($locale['mon_decimal_point'], $value);
            if ($locale["{$letter}_cs_precedes"]) {
                $value = $prefix . $currency . $space . $value . $suffix;
            } else {
                $value = $prefix . $value . $space . $currency . $suffix;
            }
            if ($width > 0) {
                $value = str_pad($value, $width, $flags['fillchar'], $flags['isleft'] ?
                                STR_PAD_RIGHT : STR_PAD_LEFT);
            }
            $format = str_replace($fmatch[0], $value, $format);
        }
        return $format;
    }