Monefy - PHP Ultimate Money / Currency / Float Formatter and Fixer

monefy.php

<?php

/*
|--------------------------------------------------------------------------
| Monefy - PHP Ultimate Money / Currency / Float Formatter and Fixer
|--------------------------------------------------------------------------
|
| This function formats almost any input to currency and can also
| parse the formatted value as a float for database/backend operations
|
*/

$test = [
    304,
    540.834,
    30010.00,
    '30020,000, ',
    '30050,00',
    '30.050,00',
    '30,050.03',
    '100 130,050.03',
    '30 050.023',
    '30 050,023',
    '100, 130,050.023',
    '-100, 130,050.023',
    '4485 4497 7224.8410',
    'R$ 1,200.53',
    'US$ 1.400,679',
    'André Silva',
    false,
    null
];

foreach ($test as $n) {
    var_dump(monefy($n, 2, '.', ',')); // formated string for users/view
    var_dump((float)monefy($n, 2, '.', '', '')); // parse float for database/backend
}

// outputs
// string(10) "US$ 304.00"
// float(304)
// string(10) "US$ 540.83"
// float(540.83)
// string(13) "US$ 30,010.00"
// float(30010)
// string(13) "US$ 30,020.00"
// float(30020)
// string(13) "US$ 30,050.00"
// float(30050)
// string(13) "US$ 30,050.00"
// float(30050)
// string(13) "US$ 30,050.03"
// float(30050.03)
// string(18) "US$ 100,130,050.03"
// float(100130050.03)
// string(13) "US$ 30,050.02"
// float(30050.02)
// string(13) "US$ 30,050.02"
// float(30050.02)
// string(18) "US$ 100,130,050.02"
// float(100130050.02)
// string(19) "US$ -100,130,050.02"
// float(-100130050.02)
// string(22) "US$ 448,544,977,224.84"
// float(448544977224.84)
// string(12) "US$ 1,200.53"
// float(1200.53)
// string(12) "US$ 1,400.68"
// float(1400.68)
// string(16) "US$ André Silva"
// float(0)
// string(4) "US$ "
// float(0)
// string(4) "US$ "
// float(0)

function monefy($input, $decimals = 2, $dec_point = '.', $thousands_sep = ',', $prefix = 'US$ ') {

    // remove HTML encoded characters: http://stackoverflow.com/a/657670
    // special characters that arrive like &0234;
    $input = preg_replace("/&#?[a-z0-9]{2,8};/i",'',$input);
    
    // trim
    $number = preg_replace('/^([^0-9\-]+)|([^0-9\-]+)$/', '', $input);

    if(empty($number)) {
        return $prefix . $input;
    }

    preg_match_all('/[^0-9\-]/', $number, $last_dec_point, PREG_OFFSET_CAPTURE);

    while (is_array($last_dec_point)) {
        $last_dec_point = end($last_dec_point);
    }

    if(empty($last_dec_point)) {
        return $prefix . number_format($number , $decimals, $dec_point, $thousands_sep);
    }

    $dec = strlen($number) - ($last_dec_point + 1);

    $factor = '1' . str_pad('', $dec, '0', STR_PAD_RIGHT);

    return $prefix . number_format(preg_replace('/[^0-9\-]/', '', $number) / $factor , $decimals, $dec_point, $thousands_sep);
}

N I C E