Password Generator for PHP 8.2+

A modern, flexible, and secure password generator built for PHP 8.2+. Designed with configuration-first principles, it supports character-type rules, avoidance of consecutive characters, and rich presets out of the box.

✨ Features

• PHP 8.2+ with readonly and strong types
• Configurable character pools: lowercase, uppercase, numbers, symbols
• Range-based character counts via PoolRange
• Always start with a letter (optional)
• Avoid consecutive characters (enabled by default)
• Character exclusion (e.g., omit l, 1, 0, O)
• Built-in presets (safe, strong, human-friendly, dev)
• Pest-based test suite
• Clean Composer autoloading (PSR-4)

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⚙ Installation

composer require kristos80/password-generator

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📄 Usage

Basic Example

<?php
declare(strict_types=1);

require_once __DIR__ . "/vendor/autoload.php";

use Kristos80\PasswordGenerator\PasswordGenerator;
use Kristos80\PasswordGenerator\PasswordGeneratorConfigFactory;

$config = PasswordGeneratorConfigFactory::safeDefault();
$password = (new PasswordGenerator())->generate($config);

echo $password; //Cf<q{h8q4M%

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🔧 Presets

safeDefault()

Balanced password with 3 lowercase, 2 uppercase, 2 numbers, 2 symbols. Avoids confusing characters like l, 1, 0, O.

strong()

16-20 character high-entropy password with balanced character pools.

humanFriendly()

No symbols, avoids ambiguous characters. Easier to type & read.

symbolHeavy()

Perfect for password vaults or power users. Focuses on symbol density.

developerPreset()

Ideal for API tokens: all alphanumeric, no symbols, fixed length.

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⚖️ Custom Configuration

You can define your own ranges:

use Kristos80\PasswordGenerator\PasswordGeneratorConfig;
use Kristos80\PasswordGenerator\PoolRange;

$config = new PasswordGeneratorConfig(
    new PoolRange(3, 5),   // lowercase
    new PoolRange(2, 4),   // uppercase
    new PoolRange(2, 2),   // numbers
    new PoolRange(1, 2),   // symbols
    true,                  // must start with a letter
    ['l', '1', '0', 'O']   // characters to exclude
);

Then:

$password = (new PasswordGenerator())->generate($config);

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🧰 Built-in Logic

Consecutive Character Avoidance

Consecutive identical characters are avoided (e.g., aa, 11, $$), with up to 5 reshuffling attempts internally.

Start with Character

When enabled, the password will always begin with a letter (a-z or A-Z).

Exclusions

Characters passed via doNotUse will never appear in the final password, case-insensitively.

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🧪 Testing

This package uses Pest for testing.

composer test

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📖 License

MIT © Kristos80