Num

An accurate PHP helper for parsing numbers from strings with support for various thousands and decimal separators.

Requirements

Package Version	PHP Version
v2.x	^8.1
v1.x	^8.0

Installation

$ composer require 514sid/num

What It Does

The built-in PHP functions intval() and floatval(), along with typecasting, may not always correctly handle varying numeric value formats based on regional standards.

floatval("1 234 567.89")    // float(1)
intval("1,234.56")          // int(1)

With the Num helper, you can achieve the desired functionality.

You have the option to provide the decimal separator to the int() or float() methods.

Alternatively, you can allow the Num helper to make an educated guess if you're unsure about the exact separator used in a specific string representing a numeric value.

use Num\Num;
use Num\Enums\DecimalSeparator;

Num::float('1,234,567.89', DecimalSeparator::POINT) // float(1234567.89)
Num::float('1.234.567,89', DecimalSeparator::COMMA) // float(1234567.89)
// or
Num::float('1,234,567.89')  // float(1234567.89)
Num::float('1.234.567,89')  // float(1234567.89)
Num::float(123)             // float(123.0)

Num::int('1,234,567.89')    // int(1234567)
Num::int('1.234.567,89')    // int(1234567)
Num::int(123.45)            // int(123)

Num::float('text')  // float(0.0)
Num::int('text')    // int(0)

Num::int('1.23e3')    	  // int(1230)
Num::float('-5.67e-4')    // float(-0.000567)

How It Works

When you pass a decimal separator as the second argument to the int() or float() static methods, they remove everything from the string except digits and the decimal separator, and then perform typecasting using PHP's built-in functionality.

If you do not specify a decimal separator, the Num helper tries to guess it using the DecimalSeparatorGuesser, which relies on formatting conventions from the Wikipedia article: https://en.wikipedia.org/wiki/Decimal_separator.

I am still working on improving DecimalSeparatorGuesser, so it might not be 100% accurate.

In most locales, for numbers smaller than 100000, a thousand separator is used based on powers of 1000.

This means that if a string is provided with only one dot or comma and there are 3 digits following it, the guesser will treat this number as a whole number; otherwise it will treat it as a float.

use Num\Num;

Num::float('12.34567')  // float(12.34567)
Num::float('12.34')     // float(12.34)
Num::float('12.345')    // float(12345.0)
Num::float('1234,567')  // float(1234.567)

Laravel Casts

use Num\Casts\NumInt;
use Num\Casts\NumFloat;

protected $casts = [
    'integer' => NumInt::class,
    'float'   => NumFloat::class,
];

License

MIT