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adeel-raza/password_generator.php

Created November 3, 2023 16:09
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PHP based password generator program
Raw
password_generator.php
<?php
function generatePassword(
$length,
$useUppercase,
$useLowercase,
$useDigits,
$useSpecialChars
) {
$formats = [
"uppercase" => "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
"lowercase" => "abcdefghijklmnopqrstuvwxyz",
"digits" => "0123456789",
"special" => '!@#$%^&*()_+-=[]{}|;:,.<>?',
];
$selectedFormats = 0;
if ($useUppercase) {
$selectedFormats++;
}
if ($useLowercase) {
$selectedFormats++;
}
if ($useDigits) {
$selectedFormats++;
}
if ($useSpecialChars) {
$selectedFormats++;
}
if ($selectedFormats === 0) {
return "Please select at least one character format.";
}
$password = "";
$charactersPerFormat = floor($length / $selectedFormats);
while ($length > 0) {
if ($useUppercase && $length > 0) {
$shuffledStr = str_shuffle($formats["uppercase"]);
$randomSubset = substr($shuffledStr, 0, $charactersPerFormat);
$password .= $randomSubset;
$length = $length - $charactersPerFormat;
}
if ($useLowercase && $length > 0) {
$shuffledStr = str_shuffle($formats["lowercase"]);
$randomSubset = substr($shuffledStr, 0, $charactersPerFormat);
$password .= $randomSubset;
$length = $length - $charactersPerFormat;
}
if ($useDigits && $length > 0) {
$shuffledStr = str_shuffle($formats["digits"]);
$randomSubset = substr($shuffledStr, 0, $charactersPerFormat);
$password .= $randomSubset;
$length = $length - $charactersPerFormat;
}
if ($useSpecialChars && $length > 0) {
$shuffledStr = str_shuffle($formats["special"]);
$randomSubset = substr($shuffledStr, 0, $charactersPerFormat);
$password .= $randomSubset;
$length = $length - $charactersPerFormat;
}
}
$password = str_shuffle($password);
return $password;
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Coding Arena</title>
<link href="https://fonts.googleapis.com/css?family=Montserrat:400,500,600,700" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.min.js" integrity="sha384-cuYeSxntonz0PPNlHhBs68uyIAVpIIOZZ5JqeqvYYIcEL727kskC66kF92t6Xl2V" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" integrity="sha384-rbsA2VBKQhggwzxH7pPCaAqO46MgnOM80zW1RWuH61DGLwZJEdK2Kadq2F9CUG65" crossorigin="anonymous">
<style>
* {
font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Oxygen-Sans", Ubuntu, "Cantarell", "Helvetica Neue", sans-serif;
}
body {
font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Oxygen-Sans", Ubuntu, "Cantarell", "Helvetica Neue", sans-serif;
background-color: #f2f2f2;
margin: 0;
padding: 0;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
height: 100vh;
}
.container {
background-color: #fff;
padding: 20px;
border-radius: 5px;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
max-width: 600px;
}
h1, h2, h3 {
color: #333;
}
div {
background-color: #f5f5f5;
padding: 5px;
color: #4f4f4f;
border: 1px solid #ddd;
border-radius: 3px;
display: block;
}
/* Style input fields and buttons */
/* Add more styles as needed */
</style>
</head>
<body>
<div class="container">
<h1>My Coding Arena</h1>
<p>The code shows here:</p>
<div>
<!-- Add your code below this line -->
<h2>Password Generator</h2>
<form action="" method="post">
<div class="form-group">
<label for="length">Password Length:</label>
<input type="number" class="form-control" name="length" id="length" min="6" required>
</div>
<div class="mt-3"></div>
<div class="form-check">
<input type="checkbox" class="form-check-input" name="uppercase" id="uppercase">
<label class="form-check-label" for="uppercase">Include Uppercase Letters</label>
</div>
<div class="form-check">
<input type="checkbox" class="form-check-input" name="lowercase" id="lowercase">
<label class="form-check-label" for="lowercase">Include Lowercase Letters</label>
</div>
<div class="form-check">
<input type="checkbox" class="form-check-input" name="digits" id="digits">
<label class="form-check-label" for="digits">Include Digits</label>
</div>
<div class="form-check">
<input type="checkbox" class="form-check-input" name="special" id="special">
<label class="form-check-label" for="special">Include Special Characters</label>
</div>
<button type="submit" class="btn btn-primary" name="generate">Generate Password</button>
</form>
<div class="mt-3"></div>
<?php
if (isset($_POST["generate"])) {
$length = isset($_POST["length"]) ? intval($_POST["length"]) : 6;
$useUppercase = isset($_POST["uppercase"]);
$useLowercase = isset($_POST["lowercase"]);
$useDigits = isset($_POST["digits"]);
$useSpecialChars = isset($_POST["special"]);
$password = generatePassword(
$length,
$useUppercase,
$useLowercase,
$useDigits,
$useSpecialChars
);
echo "<h2>Generated Password:</h2>";
echo "<p>$password</p>";
}
?>
<!-- Add your code above this line -->
</div>
</div>
</body>
</html>
@adeel-raza
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Author

adeel-raza commented Nov 3, 2023 •
edited

Psuedo code:

  1. Display HTML form for user input:
    • Password length
    • Include Uppercase Letters (Checkbox)
    • Include Lowercase Letters (Checkbox)
    • Include Digits (Checkbox)
    • Include Special Characters (Checkbox)
    • Generate Password Button
  1. Create a function named password_generator to generate passwords based on user input (length, useUppercase, useLowercase, useDigits, useSpecialChars).
    a) create variables to save password length, is uppercase, is lowercase, is digits, is special, and the password (empty)
    b) check if the user has selected at least one of the formats and password length
    c) create an array to save all uppercase, lowercase, digits, and special chars as array keys
    d) create another variable called characters_in_bucket which is equal to password length divided by no of selected formats
    e) floor the value of characters_in_bucket to get the correct value
    f) loop until the password length is greater than zero
    f.a) check if the user has selected is uppercase and then access the uppercase array key and randomly select the no.of characters_in_bucket
    f.a.a) append the selected character to the password variable
    f.a.b) subtract the password length with characters_in_bucket to keep track of the remaining characters needed
    f.b) check if the user has selected is lower and password length is greater than zero
    f.b.a) then access the lower array key and randomly select the no.of characters_in_bucket
    f.b.b) append the selected character to the password variable
    f.b.c) subtract the password length with characters_in_bucket to keep track of the remaining characters needed
    f.c) check if the user has selected is digits and and password length is greater than zero
    f.c.a) then access the digits array key and randomly select the no.of characters_in_bucket
    f.c.b) append the selected character to the password variable
    f.c.c) subtract the password length with characters_in_bucket to keep track of the remaining characters needed
    f.d) check if the user has selected is special and the password length is greater than zero
    f.d.a) then access the special array key and randomly select the no.of characters_in_bucket
    f.d.b) append the selected character to the password variable
    f.d.c) subtract the password length with characters_in_bucket to keep track of the remaining characters needed
    g) return the generated password variable back
  2. call the function password_generator and save the value in generated_password
  3. display the generated password on frontend along with the heading generated password

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