Php check user password

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

Saved searches

Use saved searches to filter your results more quickly

You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session.

Sense checks when a user picks a new password

License

fusionspim/php-password-checker

This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?

Sign In Required

Please sign in to use Codespaces.

Launching GitHub Desktop

If nothing happens, download GitHub Desktop and try again.

Launching GitHub Desktop

If nothing happens, download GitHub Desktop and try again.

Launching Xcode

If nothing happens, download Xcode and try again.

Launching Visual Studio Code

Your codespace will open once ready.

There was a problem preparing your codespace, please try again.

Latest commit

Git stats

Files

Failed to load latest commit information.

README.md

Passwords must be at least 10 characters in length and not be commonly used — there’s no means to override this.

Numeric looking passwords are rejected, to weed out obvious memorable dates and phone numbers.

All password checks are case insensitive.

$checker = new PasswordChecker; $checker->validate('abc123'); // throws PasswordException (too short) $checker->validate('password123'); // throws PasswordException (too common) $checker->validate('123-456-7890'); // throws PasswordException (too numeric) $checker->validate('31/12/1999'); // throws PasswordException (too numeric) $checker->validate('we love php'); // returns true 

That’s it. Though you can add further (optional, but recommended) checks and restrictions.

Prevent password reuse by storing previous password hashes in your application and passing them in:

$checker = new PasswordChecker; $checker->setPreviousPasswords($arrayOfHashes); // generated from password_hash() $checker->validate($userSuppliedPassword); 

If you ask users to confirm their new password, you can pass that in too — simply to have all checks handled consistently:

$checker = new PasswordChecker; $checker->setConfirmation($userSuppliedConfirmation); $checker->validate($userSuppliedPassword); 

User or application obvious

Provide a blacklist of words that are obvious in the context of the user/application. If they’re within (i.e. not necessarily equal to) the user supplied password, validation will fail:

$checker = new PasswordChecker(['clem', 'fandango', 'MyAmazingApp']); $checker->validate('myamazingapp'); // throws PasswordException $checker->validate('myamazingapp123'); // throws PasswordException $checker->validate('clemfandango'); // throws PasswordException $checker->validate('fandango123'); // throws PasswordException 

Complexity requirements can be enabled to require user passwords to contain a lower case letter, upper case letter, number and special character.

This is disabled by default, since it isn’t a recommended approach.

$checker = new PasswordChecker; $checker->setComplexityRequirements([ PasswordChecker::REQUIRE_LOWERCASE, PasswordChecker::REQUIRE_UPPERCASE, PasswordChecker::REQUIRE_NUMBER, PasswordChecker::REQUIRE_SYMBOL ]); $checker->validate('myamazingapp'); // throws PasswordException $checker->validate('myamazingapp123'); // throws PasswordException $checker->validate('myamazongpp123!'); // throws PasswordException $checker->validate('Myamazingapp123!); // return true 

About

Sense checks when a user picks a new password

Источник

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.

You may also like.

How to get Title and Meta tags from URL using PHP

Create Retrieve Update and Remove a Cookie using PHP

How to fix phpMyAdmin error – Incorrect format parameter

Remove all files and subfolders from a folder in PHP

How to rename a file or directory in PHP

Load dynamic content in Bootstrap Modal with AJAX, PHP and MySQL

2 Responses

Leave a Reply Cancel reply

Search your query

Recent Posts

• Executing MySQL Queries Directly From the Command Line July 26, 2023
• Listing tables and their structure with the MySQL Command Line July 25, 2023
• How to Import an .sql File into a Remote Server from a Local Machine July 24, 2023
• How to Copy a File from/to a Remote Server using Command Line July 23, 2023
• Create a MySQL Database on Linux via Command Line July 22, 2023

Tags

Join us

Top Posts

Explore the article

We are not simply proficient at writing blog post, we’re excellent at explaining the way of learning which response to developers.

For any inquiries, contact us at [email protected] .

Quick Links

• We provide the best solution to your problem.
• We give you an example of each article.
• Provide an example source code for you to download.
• We offer live demos where you can play with them.
• Quick answers to your questions via email or comment.

Clue Mediator © 2023. All Rights Reserved.

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience.

Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.

Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.

Источник