تابع تولید رمزعبور قدرتمند با PHP

<?php

	/**
	 * strongPassword Class
	 * Author : Amir Shokri
	 * E-mail : amirsh.nll@gmail.com
	 * Date : 29 May, 2020
	 */

	class strongPassword
	{

		public function randomText($length, $patternType = 4) {

			if(!is_numeric($length) || $length < 1)
				$length = 20;

		    $small_alphabet = "abcdefghijklmnopqrstuwxyz";
		    $big_alphabet = "ABCDEFGHIJKLMNOPQRSTUWXYZ";
		    $number = "0123456789";
		    $characters = "!@#$%^&*()[]{};:'?`~+-_,<>";

		    if(!is_numeric($patternType) || $patternType < 0 || $patternType > 4)
				$patternType = 4;

			$pettern = $small_alphabet . $big_alphabet . $number . $characters;
			if($patternType == 1)
				$pettern = $small_alphabet;
			elseif($patternType == 2)
				$pattern = $small_alphabet . $big_alphabet;
			elseif($patternType == 3)
				$pattern = $small_alphabet . $big_alphabet . $number;
			elseif($patternType == 4)
				$pattern = $small_alphabet . $big_alphabet . $number . $characters;
			else
				$pattern = $small_alphabet . $big_alphabet . $number . $characters;

		    for ($i = 0; $i < $length; $i++) {
		        $n = rand(0, strlen($pettern) - 1);
		        $result[$i] = $pettern[$n];
		    }

		    return substr(implode('', $result), 0, $length);
		}

	}

	$strongPassword = new strongPassword();
	echo "<strong>&dollar;strongPassword->randomText(5) : </strong><br />" . $strongPassword->randomText(5) . "<br /><br />";
	echo "<strong>&dollar;strongPassword->randomText(20, 1) : </strong><br />" . $strongPassword->randomText(20, 1) . "<br /><br />";
	echo "<strong>&dollar;strongPassword->randomText(30, 2) : </strong><br />" . $strongPassword->randomText(30, 2) . "<br /><br />";
	echo "<strong>&dollar;strongPassword->randomText(40, 3) : </strong><br />" . $strongPassword->randomText(40, 3) . "<br /><br />";
	echo "<strong>&dollar;strongPassword->randomText(50, 4) : </strong><br />" . $strongPassword->randomText(50, 4) . "<br /><br />";

?>