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JavaScript number_format function

A JavaScript equivalent of PHP’s number_format

strings/number_format.js raw on github
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function number_format(number, decimals, dec_point, thousands_sep) {
  //  discuss at: http://phpjs.org/functions/number_format/
  // original by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
  // improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // improved by: davook
  // improved by: Brett Zamir (http://brett-zamir.me)
  // improved by: Brett Zamir (http://brett-zamir.me)
  // improved by: Theriault
  // improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // bugfixed by: Michael White (http://getsprink.com)
  // bugfixed by: Benjamin Lupton
  // bugfixed by: Allan Jensen (http://www.winternet.no)
  // bugfixed by: Howard Yeend
  // bugfixed by: Diogo Resende
  // bugfixed by: Rival
  // bugfixed by: Brett Zamir (http://brett-zamir.me)
  //  revised by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
  //  revised by: Luke Smith (http://lucassmith.name)
  //    input by: Kheang Hok Chin (http://www.distantia.ca/)
  //    input by: Jay Klehr
  //    input by: Amir Habibi (http://www.residence-mixte.com/)
  //    input by: Amirouche
  //   example 1: number_format(1234.56);
  //   returns 1: '1,235'
  //   example 2: number_format(1234.56, 2, ',', ' ');
  //   returns 2: '1 234,56'
  //   example 3: number_format(1234.5678, 2, '.', '');
  //   returns 3: '1234.57'
  //   example 4: number_format(67, 2, ',', '.');
  //   returns 4: '67,00'
  //   example 5: number_format(1000);
  //   returns 5: '1,000'
  //   example 6: number_format(67.311, 2);
  //   returns 6: '67.31'
  //   example 7: number_format(1000.55, 1);
  //   returns 7: '1,000.6'
  //   example 8: number_format(67000, 5, ',', '.');
  //   returns 8: '67.000,00000'
  //   example 9: number_format(0.9, 0);
  //   returns 9: '1'
  //  example 10: number_format('1.20', 2);
  //  returns 10: '1.20'
  //  example 11: number_format('1.20', 4);
  //  returns 11: '1.2000'
  //  example 12: number_format('1.2000', 3);
  //  returns 12: '1.200'
  //  example 13: number_format('1 000,50', 2, '.', ' ');
  //  returns 13: '100 050.00'
  //  example 14: number_format(1e-8, 8, '.', '');
  //  returns 14: '0.00000001'

  number = (number + '')
    .replace(/[^0-9+\-Ee.]/g, '');
  var n = !isFinite(+number) ? 0 : +number,
    prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),
    sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
    dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
    s = '',
    toFixedFix = function(n, prec) {
      var k = Math.pow(10, prec);
      return '' + (Math.round(n * k) / k)
        .toFixed(prec);
    };
  // Fix for IE parseFloat(0.55).toFixed(0) = 0;
  s = (prec ? toFixedFix(n, prec) : '' + Math.round(n))
    .split('.');
  if (s[0].length > 3) {
    s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep);
  }
  if ((s[1] || '')
    .length < prec) {
    s[1] = s[1] || '';
    s[1] += new Array(prec - s[1].length + 1)
      .join('0');
  }
  return s.join(dec);
}

Please note that php.js uses JavaScript objects as substitutes for PHP arrays, they are the closest match to this hashtable-like data structure.

Please also note that php.js offers community built functions and goes by the McDonald’s Theory. We’ll put online functions that are far from perfect, in the hopes to spark better contributions. Do you have one? Then please just:

Other PHP functions in the strings extension

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