A user friendly, strong password generator PHP function.

strong-passwords.php

<?PHP
// Generates a strong password of N length containing at least one lower case letter,
// one uppercase letter, one digit, and one special character. The remaining characters
// in the password are chosen at random from those four sets.
//
// The available characters in each set are user friendly - there are no ambiguous
// characters such as i, l, 1, o, 0, etc. This, coupled with the $add_dashes option,
// makes it much easier for users to manually type or speak their passwords.
//
// Note: the $add_dashes option will increase the length of the password by
// floor(sqrt(N)) characters.

function generateStrongPassword($length = 9, $add_dashes = false, $available_sets = 'luds')
{
	$sets = array();
	if(strpos($available_sets, 'l') !== false)
		$sets[] = 'abcdefghjkmnpqrstuvwxyz';
	if(strpos($available_sets, 'u') !== false)
		$sets[] = 'ABCDEFGHJKMNPQRSTUVWXYZ';
	if(strpos($available_sets, 'd') !== false)
		$sets[] = '23456789';
	if(strpos($available_sets, 's') !== false)
		$sets[] = '!@#$%&*?';

	$all = '';
	$password = '';
	foreach($sets as $set)
	{
		$password .= $set[array_rand(str_split($set))];
		$all .= $set;
	}

	$all = str_split($all);
	for($i = 0; $i < $length - count($sets); $i++)
		$password .= $all[array_rand($all)];

	$password = str_shuffle($password);

	if(!$add_dashes)
		return $password;

	$dash_len = floor(sqrt($length));
	$dash_str = '';
	while(strlen($password) > $dash_len)
	{
		$dash_str .= substr($password, 0, $dash_len) . '-';
		$password = substr($password, $dash_len);
	}
	$dash_str .= $password;
	return $dash_str;
}

Great Code

I have found a short and simple function here http://www.hughlashbrooke.com/2012/04/simple-way-to-generate-a-random-password-in-php/

Good work, thanks for the function

I can't seem to make it display the password? How do I use it?

• nevermind, I found out. Just sharing -> add:

@Shifrin: Your solution does not require a BIG LETTER, a small letter, a number (0-9) and a special character, which makes your password very much stronger.

Head's up: This gist is not secure. Neither array_rand() nor str_shuffle() are cryptographically secure.

Recommended reading: How to generate secure passwords in PHP.

This is great! I needed the ability to force the use of certain characters to make the password. hanks! Good work!

thanks

thks

God bless you!

a good script.

Thanks,Very Useful

Good work!

Thanks a lot!

thanks!

try this simple code : http://www.sanwebcorner.com/2017/08/generate-password-to-textbox-using-php.html

A very good script. Thank you so much.

thank you 👍

Thank you dude! vk.com here)

thank you

thanks!

make a forked version of this script, whit some improvments in crypt functions

https://gist.github.com/compermisos/cf11aed742d2e1fbd994e083b4b0fa78

See my implementation works with all chars languages.

Here is easy https://www.dohangout.com/forum/viewtopic.php?f=23&t=333 no need to create password. 14 million password. Enjoy

I generate mine like this... http://tools.webbatlas.com but i need to include few symbols on this project

Thks a lot

Great! many many thanks!!!

Amazing!

Very good work. Thanks.

Thanks a lot

thank you kind sir