PHP - Generate a string based on regex

Question

I would like to generate a string based on the regular expression I have.

The purpose of this function is when someone forgets their password, and completes the form for "Email New Password", I generate a random password that will be emailed to them. This new password must satisfy the conditions of my regex.

This is my regex:

'/.*^(?=.{6,})(?=.*[A-z])(?=.*[A-Z])(?=.*[0-9])(?=.*\W).*$/'

And is the aim to do this with arbitrary regexes, or just this one specific regex? — Oliver Charlesworth
– Oliver Charlesworth, Commented Jan 9, 2013 at 1:57
There is a java library for this called Xeger. Although it us useless for PHP it might be a good starting point : code.google.com/p/xeger — hek2mgl
– hek2mgl, Commented Jan 9, 2013 at 1:59
What I tried is creating multiple random expression generators; where on generates random alphabets that aren't capitalized, another that is capitalized, another one that generates numbers (3 digits) and another that is generating characters from a list. Though, you can see that concatenating them and processing them is too heavy. I was wondering if a single operation based on regex can be implemented. I'll look into the Java plugin, but I prefer using PHP alone :) Thank you for sharing! — Adib
– Adib, Commented Jan 9, 2013 at 20:55

Ivan Enderlin · Accepted Answer · 2014-09-30 20:46:49Z

2

Did you take a look at the Hoa\Regex library? It generates strings based on regular expression with an isotropic random approach.

answered Sep 30, 2014 at 20:46

Ivan Enderlin

1121 silver badge3 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

ggdx Over a year ago

This is a comment, not necessarily an answer.

Ivan Enderlin Over a year ago

So as an anwer, please check this article: mnt.io/P/… :-).

Adib Over a year ago

Yes, it's long overdue, but your research paper was quite a good read. Thank you for sharing this!

Emerson Rocha Over a year ago

@IvanEnderlin did Hoa\Regex works for "[0-9A-Za-z_-]{10}[048AEIMQUYcgkosw]" ? This is the Regex for the VideoID of youtube. (here the reference webapps.stackexchange.com/questions/54443/…). The demo example form documentation works, but this one return "Undefined property: Hoa\Compiler\Exception\UnexpectedToken::$_tmpArguments". Maybe I shoud report on the github. Edit: the poster regex gives the same error. And yes, I'm aware that regex implement regex is a huge work.

Jeff Hartman · Accepted Answer · 2014-02-14 00:14:53Z

1

Try this. No need for confusing regex:

function random_password( $length = 8 ) {
    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()_-=+;:,.?";
    $password = substr( str_shuffle( $chars ), 0, $length );
    return $password;
}

answered Feb 14, 2014 at 0:14

Jeff Hartman

566 bronze badges

Collectives™ on Stack Overflow

PHP - Generate a string based on regex

2 Answers 2

4 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

4 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related