README

The only voucher (alphanumeric code) generator you will ever need for PHP.
Voucherator has a fluent Generator class that can generate various types of random alphanumeric codes. The package also includes a Transformer class that you can use to apply some transformations to the generated vouchers. You can use it to generate passwords, pass codes, keys, vouchers, coupons, tickets, tokens etc.

Prerequisites

This package uses PHP 7's random_int() function which generates cryptographic random integers that are suitable for use where unbiased results are critical, such as when shuffling a deck of cards for a poker game.

The sources of randomness used for this function are as follows and if your machine does not provide one of these, you will not be able to use this package.

• On Windows, » CryptGenRandom() will always be used. As of PHP 7.2.0, the » CNG-API will always be used instead.
• On Linux, the » getrandom(2) syscall will be used if available.
• On other platforms, /dev/urandom will be used.
• If none of the aforementioned sources are available, then an Exception will be thrown. (caught and supressed by this package)

Installation

Via Composer

This package can be installed easily with composer - just require the amestsantim/voucherator package from the command line.

composer require amestsantim/voucherator

Alternatively, you can manually add the voucherator package to your composer.json file and then run composer install from the command line as follows:

{
    "require": {
        "amestsantim/voucherator": "~2.1"
    }
}

composer install

You can use it in your PHP code like this:

<?php
require __DIR__ . '/vendor/autoload.php';
use Amestsantim\Voucherator\VoucherGenerator;

$v = new VoucherGenerator();
echo "Your coupon code is " . $v->letters()->length(12)->lowerCase()->generate()[0];
// Your coupon code is pxEJvcvRjwNg

If you are using it in Laravel, you can instantiate an object from the AmestSantim\Voucherator\VoucherGenerator and statically access the methods from the AmestSantim\Voucherator\VoucherTransformer class, if you need to apply transformations on your generated vouchers.

Usage

$v = AmestSantim\Voucherator\VoucherGenerator();

$v->generate(10);
// ["6ae4OgTp", ...]

$v->letters()->generate(5);
// ["sVnkujCq", ...]

$v->numerals()->length(16)->generate();
// ["1734785015950957", ...]

$v->letters()->upperCase()->generate(200);
// ["JTMAZNIZDDSUGVHC", ...]

$v->numerals()->exclude('018')->generate(3);
// ["4454525224222425", ...]

$vouchers = $v->augment('#*')->generate(3);
VoucherTransformer::addPrefix($vouchers, 'ET');
// ["ET69376##4492*2736", ...]

$vouchers = $v->length(14)->generate(3);
VoucherTransformer::addSeparator(VoucherTransformer::addPrefix($voucher, 'AA'), 4, '-');
// ["AA4Z-c3pP-APDU-E4u2", ...]

$v->length(6)->numerals();
$v->generate(100)
// ["939374", ...]

Documentation

The package is organized very simply. It contains only two classes:

• VoucherGenerator
• VoucherTransformer

VoucherGenerator

The methods of the VoucherGenerator class can be semantically classified into two:

Mutators

These are the functions that mutate the character set (charSet) from which the vouchers/codes are generated. The default is lower case alphabets, upper case alphabets and numerals. Be mindful that the order in which you apply these function will result in different outcomes.

• letters()
  Calling this function will set the character set to be lower (a - z) and upper (A - Z) case alphabets.

• numerals()
  This will set the character set to be numerals (0123456789).

• upperCase()
  This will change the characters in the character set all to upper case (A - Z). If the set happend to be upper and lower case letters before the application of the function, then the set will be consolidated (redundancies removed).

• lowerCase()
  This will change the characters in the character set all to lower case (a - z). If the set happend to be upper and lower case letters before the application of the function, then the set will be consolidated (redundancies removed).

• exclude(string $exclusionList)
  This function will remove the given characters ($exclusionList) from the character set. If the given characters are not in the character set then it will be ignored. Example: $v->exclude('0o1li')->generate()

• augment(string $inclusionList)
  This function will add the given characters ($inclusionList) to the character set. If the given characters (some) are already in the character set then they will not be added again. Example: $v->augment('#_*@?')->generate()

Action and Related

These function are action functions which tell the object to actually generate the vouchers/codes based on the (possibly previously mutated) character set.

• generate(int $count)
  This function needs to be called at the end of a fluent chain. You can not call generate() in the middle of a chain. It accepts the number of vouchers to generate and returns an array of generated vouchers (even for a single voucher).

• length(int $voucherLength)
  This function is used to set the length (size) of your vouchers. The default value used (if you do not call this function) is 8.

• charSet()
  This function returns the current character set as is. The return is array. It is included for testing and debugging purposes and would have no conceivable use in production.

VoucherTransformer

The methods of the VoucherTransformer class are all static and can be used without instantiating an object. They act upon the vouchers/codes after they have been generated by transforming the vouchers in superficial (presentational) ways such as re-formatting and decorating them. All the functions are static and accept and return an array of vouchers.

• capitalizeFirstCharacter(array $vouchers)
  This function will capitalize the first character of each voucher/code. Example: $myProperCaseVouchers = VoucherTransformer::capitalizeFirstCharacter($myVouchers)

• addSeparator(array $vouchers, int $chunkSize, character $separator)
  This function will group the characters of the vouchers in to chunks of size $chunkSize and join them with the given character ($separator)

• addPrefix(array $vouchers, string $prefix)
  This function will prefix all generated vouchers/codes with the given string ($prefix)

Contributing

The code follows the PSR-2 coding style guide. It was also written with extensibility in mind. Please feel free to submit a pull request, if you come up with any useful improvements.

Versioning

We use SemVer for versioning. For the versions available, see the tags on this repository.

Authors

• Nahom Tamerat

License

This project is licensed under the MIT License - see the LICENSE.md file for details

Acknowledgments

• This package was inspired by keygen-php