A PHP login user name and password Authentication instance program, there are friends who need to learn to reference.
, authentication of user name and password entered by user at login
| The code is as follows |
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/**
* Validator for Login.
*/
Final class Loginvalidator { Private Function __construct () {
} /**
* Validate the given username and password.
* @param $username and $password to be validated
* @return Array array of {@link Error} s
*/
public static function Validate ($username, $password) {
$errors = Array ();
$username = Trim ($username);
if (! $username) {
$errors [] = new Error (' username ', ' username cannot be empty. ');
} elseif (Strlen ($username) <3) {
$errors [] = new Error (' username ', ' username cannot be less than 3 characters long. ');
} elseif (Strlen ($username) >30) {
$errors [] = new Error (' username ', ' username cannot be longer than 30 characters. ');
} elseif (!preg_match ('/^[a-za-z]+$/', substr ($username, 0, 1))) {
$errors [] = new Error (' username ', ' username must start with a letter. ');
} elseif (!preg_match ('/^[a-za-z0-9_]+$/', $username)) {
$errors [] = new Error (' username ', ' username can only be a combination of letters, numbers, and underscores (_). ');
} elseif (!trim ($password)) {
$errors [] = new Error (' Password ', ' password cannot be empty. ');
} else {
Check whether use exists or not
$dao = new Userdao ();
$user = $dao->findbyname ($username); if ($user) {
if (! ( $user->getpassword () = = SHA1 ($user->getsalt (). $password))) {
$errors [] = new error (' Password ', ' username or password is wrong. ');
}
} else {
$errors [] = new Error (' username ', ' username does not exist. ');
}
}
return $errors;
}
} ?> |
2. Call Authenticator for validation
| The code is as follows |
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$username = null;
$password = null;
$msg = ""; if (isset ($_post[' username ')) && isset ($_post[' password ']) {
$username = Addslashes (Trim (stripslashes ($_post [' username ')));
$password = Addslashes (Trim (stripslashes ($_post [' Password ')));
Validate
$errors = Loginvalidator::validate ($username, $password);
if (empty ($errors)) {
Save the latest IP or login time into database and then processing page forwarding
$dao = new Userdao ();
$user = $dao->findbyname ($username);
$last _login_ip = utils::getipaddress ();
$user->setlastloginip ($last _login_ip);
$now = new DateTime ();
$user->setlastlogintime ($now);
$dao->save ($user);
Userlogin::setuserinfo ($user);
Flash::addflash (' Login successful! ');
Utils::redirect (' welcome ');
}
foreach ($errors as $e) {
$msg. = $e->getmessage (). "
";
} |
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