ReverseRegex

Use Regular Expressions to generate strings.

• Installation
• Usage
• About
  • Requirements
• Support
• Contributing
• License

Installation

This library is installed via Composer. To install, use composer require pointybeard/reverse-regex in your application.

Usage

<?php

declare(strict_types=1);

use ReverseRegex\Lexer;
use ReverseRegex\Random\SimpleRandom;
use ReverseRegex\Parser;
use ReverseRegex\Generator\Scope;

require "vendor/autoload.php";

$pattern = "[a-z0-9]{10}"; // 10 random letters and numbers

$lexer = new Lexer($pattern);
$random = new SimpleRandom();
$parser = new Parser($lexer, new Scope(), new Scope());
$generator = $parser->parse()->getResult();

$result = '';

$parser = new Parser($lexer,new Scope(),new Scope());

var_dump($generator->generate($result, $random));
// string(10) "j2ydisgoks"

See https://github.com/pointybeard-forks/ReverseRegex/tree/master/examples for more examples.

Notes When Writing Regular Expressions

1. Escape all meta-characters i.e. if you need to escape the character in a regex you will need to escape here.
2. Not all meta-characters are suppported see list below.
3. Use \X{####} to specify unicode value use [\X{####}-\X{####}] to specify range.
4. Unicdoe \p not supported, I could not find a port of UCD to php, maybe in the future support be added.
5. Quantifiers are applied to left most group, literal or character class.
6. Beware of the + and * quantifers they apply a possible maxium number of occurances up to PHP_INT_MAX.

Supported Syntax

Example	Description	Resulting String
(abcf)	Support literals this would generate string	'abcf'
\((abcf)\)	Escape meta characters as you normally would in a regex	'(abcf)'
[a-z]	Character Classes are supported	'a'
a{5}	Quantifiers supported always last group or literal or character class	'aaaaa'
a{1,5}	Range Quantifiers supported	'aa'
a|b|c	Alternation supported pick one of three at random	'b'
a|(y|d){5}	Groups supported with alternation and quantifiers	'ddddd', 'a', or 'yyyyy'
\d	Digit shorthand equ [0-9]	'1'
\w	word character shorthand equ [a-zA-Z0-9_]	'j'
\W	Non word character shorthand equ [^a-zA-Z0-9_]	'j'
\s	White space shorthand ASCII only	' '
\S	Non White space shorthand ASCII only	'i'
.	Dot all ASCII characters	'$'
* + ?	Short hand quantifiers, recommend not use them
\X{00FF}[\X{00FF}-\X{00FF}]	Unicode ranges
\xFF[\xFF-\xFF]	Hex ranges

About

Requirements

• This library works with PHP 7.2 or above.

Support

If you believe you have found a bug, please report it using the GitHub issue tracker.

Author

• Lewis Dyer (http://www.icomefromthenet.com, https://github.com/icomefromthenet/ReverseRegex) - Original author
• Alannah Kearney (https://github.com/pointybeard) - Fixed a few things after library was abandoned
• See also the list of contributors who participated in this project

License

"ReverseRegex" is released under the MIT License. See LICENCE for details.