Mineunicorn / Регистрация

How to validate password strength in PHP

Today, we’ll explain to you how to validate password strength in PHP. It is very useful to check that the password is strong which protects the user accounts and prevents hacking.

Using regular expressions, we will validate the password strength in PHP.

Check the following points to validate the password strength

• Password must be a minimum of 8 characters
• Password must contain at least 1 number
• Password must contain at least one uppercase character
• Password must contain at least one lowercase character
• Password must contain at least one special character

In the code below, we will use the PHP function preg_match() to check if the password matches the defined pattern.

if ( strlen ( $password ) < 8 | | ! $number | | ! $uppercase | | ! $lowercase | | ! $specialChars )

echo «Password must be at least 8 characters in length and must contain at least one number, one upper case letter, one lower case letter and one special character.» ;

Example

Let’s take an example to check the output. Use the above code with the HTML as below.

if ( strlen ( $password ) < 8 | | ! $number | | ! $uppercase | | ! $lowercase | | ! $specialChars )

$msg = «Password must be at least 8 characters in length and must contain at least one number, one upper case letter, one lower case letter and one special character.» ;

We can also check the password strength in a single pattern with regex.

echo «Password must be at least 8 characters in length and must contain at least one number, one upper case letter, one lower case letter and one special character.» ;

Output

Run the code and check the output in the browser.

That’s it for today.
Thank you for reading. Happy Coding.

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Источник

PHP password_verify

Summary: in this tutorial, you’ll learn to use the PHP password_verify() function to check if a password matches a hashed password.

Introduction to the PHP password_verify() function

When dealing with passwords, you should never store them in the database as plain text. And you should always hash the passwords using a secure one-way hash algorithm.

PHP provided the built-in password_hash() function that creates a hash from a plain text password. Note that the password_hash() function is a one-way hash function. It means that you cannot find its original value.

To verify if a plain text password matches a hashed password, you must hash the plain text password and compare the hashes.

However, you don’t have to do it manually since PHP provides you with the built-in password_verify() function that allows you to compare a password with a hash:

password_verify(string $password, string $hash): boolCode language: PHP (php)

The password_verify() has two parameters:

• $password is a plain text password to match.
• $hash is a hash created by the password_hash() function.

The password_verify() function returns true if the password matches the hash or false otherwise.

PHP password_verify() function example

The following example uses the password_verify() function to check if the password Password1 matches a hash:

 $hash = '$2y$10$hnQY9vdyZUcwzg2CO7ykf.a4iI5ij4Pi5ZwySwplFJM7AKUNUVssO'; $valid = password_verify('Password1', $hash); echo $valid ? 'Valid' : 'Not valid';Code language: PHP (php)

ValidCode language: PHP (php)

In practice, you’ll use the password_verify() function as following to verify a login:

• Find a user from the database by a username (or email)
• Use the password_verify() function to match the user’s provided password with a hashed password.
• If the password matches the hash, you log the user in. Otherwise, you’ll issue an error message.

The code will look like the following:

 // . $user = find_user_by_username($username); if ($user && password_verify($password, $user['password'])) < // log the user in session_regenerate_id(); $_SESSION['user_id'] = $user['id']; > else < echo 'Invalid username or password'; >Code language: PHP (php)

In the following tutorial, you’ll learn to use the password_verify() function in the login form.

Summary

• Use the PHP password_verify() function to check if a password matches a hashed password created by the password_hash() function.

Источник

Нужно проверить повтор паролей при регистрации

Здравствуйте, у меня есть проблема с проверкой паролей на совпадение. Есть 2 формы, ввод пароля и повтор пароля. Все условия вроде выставил по образцу, но в результате пропускает с двумя разными паролями к регистрации, а авторизации проходит по первому введеному. Мои знания в php+mysql нулевые или чисто на интуитивном уровне.

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 ob_start(); session_start(); if (isset($_SESSION['user']) != "") { header("Location: index.php"); } include_once 'engine/dbconnect.php'; if (isset($_POST['signup'])) { $uname = trim($_POST['uname']); // get posted data and remove whitespace $email = trim($_POST['email']); $upass = trim($_POST['pass']); $rupass = trim($_POST['rpass']); // hash password with SHA256; $password = hash('MD5', $upass); $password_r = hash('MD5', $rupass); // check email and username exist or not $stmt = $conn->prepare("SELECT email FROM users WHERE email=? OR username=?"); $stmt->bind_param("ss", $email, $username); $stmt->execute(); $result = $stmt->get_result(); $stmt->close(); $count = $result->num_rows; if ($count == 0) { // if email is not found add user $stmts = $conn->prepare("INSERT INTO users(username,email,password) VALUES(?, ?, ?)"); $stmts->bind_param("sss", $uname, $email, $password); $res = $stmts->execute();//get result $stmts->close(); $user_id = mysqli_insert_id($conn); if ($user_id > 0) { $_SESSION['user'] = $user_id; // set session and redirect to index page if (isset($_SESSION['user'])) { print_r($_SESSION); header("Location: index.php"); exit; } if($password == $password_r) { } else { $errTyp = "warning"; $errMSG = "Беда с паролями"; } } else { $errTyp = "danger"; $errMSG = "Что-то пошло не так, попробуйте еще раз"; } } else { $errTyp = "warning"; $errMSG = "Эта почта или логин уже используется"; } } ?>         
 
 
  if (isset($errMSG)) { ?> 
 echo ($errTyp == "success") ? "success" : $errTyp; ?>">  echo $errMSG; ?> 
 
  } ?>