How to make a PHP login?

Question

1.50/5 (2 votes)

See more:

I was researching about how to make a php login but all I could come up with was.

<?PHP<br />
$uandp = file_exists($_POST["username"]."user".md5($_POST["password"]).".usr");<br />
if ($uandp=="1") {<br />
$myfile = fopen("access.port", "w") or die("Unable to login!");<br />
$txt = "John Doe\n";<br />
fwrite($myfile, $txt);<br />
$txt = "Jane Doe\n";<br />
fwrite($myfile, $txt);<br />
fclose($myfile);<br />
header("Location: adm1.php");<br />
} else {<br />
header("location: error.php");<br />
}<br />
?>

Which is not very secure. How can I do one with php and cookies(including moble users)?

Posted 15-Jun-14 16:08pm

Thomas L Wilbur

Add a Solution

Comments

vbmike 16-Jun-14 10:50am

http://www.php-login.net/

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Accepted Answer · 2014-06-16T12:52:00

For really secure login, HTTP is not quite suitable. You would need an HTTPS page. Please see: http://en.wikipedia.org/wiki/HTTPS[^].

Even more important thing is: never ever store passwords anywhere. No one except the creator of the password should be able to read it, regardless the role and level of access. And this is absolutely not needed for authentication. Surprised? Disagree? Then think again. The usual schema is: use cryptographic hash function of a password and store only the hash, compare hash to hash for authentication. In all the password life cycle, it remains unknown to everyone (hash is not reversible, or, as they say, this is cryptographically infeasible) except the creator of a password. Please see:
http://en.wikipedia.org/wiki/Cryptographic_hash_function[^].

See also my past answers on the topic. None of them is related to PHP, but I tried to explain the ideas:
i already encrypt my password but when i log in it gives me an error. how can decrypte it[^],
Decryption of Encrypted Password[^],
storing password value int sql server with secure way[^],
TCP Connection with username and password[^].

Now, you should not use MD5 or SHA-1 family of algorithms, they have been found broken.
Use SHA-2 or even SHA-3 families. Please see:
http://en.wikipedia.org/wiki/MD5[^],
http://en.wikipedia.org/wiki/SHA-1[^],
http://en.wikipedia.org/wiki/SHA-2[^],
http://en.wikipedia.org/wiki/SHA-3[^].

This is how you can use implementation of SHA-2 in Javascript:
https://code.google.com/p/crypto-js[^],
and PHP: http://www.php.net//manual/en/function.hash.php[^].

SHA-3 is already implemented in PHP: https://github.com/strawbrary/php-sha3[^].
(And Javascript SHA-3 implementation is included in the Javascript library of Google Code referenced above.)

See also Javascript implementation of TLS:
https://github.com/digitalbazaar/forge[^],
see also: http://en.wikipedia.org/wiki/Transport_Layer_Security[^].

—SA