PHP login username and password verification program code_PHP tutorial

A PHP username and password verification example program for login, friends who need to learn can refer to it.

, Verify the username and password entered by the user when logging in

The code is as follows

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代码如下

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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) { $errors[] = new Error('username', '用户名不能为空。'); } elseif (strlen($username)<3) { $errors[] = new Error('username', '用户名长度不能小于3个字符。'); } elseif (strlen($username)>30) {             $errors[] = new Error('username', '用户名长度不能超过30个字符。');         } elseif (!preg_match('/^[A-Za-z]+$/',substr($username, 0, 1))) {             $errors[] = new Error('username', '用户名必须以字母开头。');         } elseif (!preg_match('/^[A-Za-z0-9_]+$/', $username)) {             $errors[] = new Error('username', '用户名只能是字母、数字以及下划线( _ )的组合。');         } elseif (!trim($password)) {             $errors[] = new Error('password', '密码不能为空。');         } 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', '用户名或密码错误。');                 }             } else {                 $errors[] = new Error('username', '用户名不存在。');             }         }         return $errors;     } } ?>

<🎜>/**
 * 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) {
                $errors[] = new Error('username', 'The username cannot be less than 3 characters in length.');
            } elseif (strlen($username)>30) {
                 $errors[] = new Error('username', 'The username cannot exceed 30 characters in length.');
             } elseif (!preg_match('/^[A-Za-z]+$/',substr($username, 0, 1))) {
                $errors[] = new Error('username', 'Username must start with a letter.');
             } elseif (!preg_match('/^[A-Za-z0-9_]+$/', $username)) {
                  $errors[] = new Error('username', 'The username can only be a combination of letters, numbers and underscores (_).');
           } elseif (!trim($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))) {
​​​​​​​​​​                    }
               } else {
                     $errors[] = new Error('username', 'Username does not exist.');
             }
         }
          return $errors;
}
} ?>

2、调用验证器进行验证

 代码如下

代码如下

复制代码

$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, 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($user);         Flash::addFlash('登录成功！');         Utils::redirect('welcome');     }         foreach ($errors as $e) {         $msg .= $e->getMessage()." ";     }

复制代码

$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, 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('登录成功！');
        Utils::redirect('welcome');
    }
   
    foreach ($errors as $e) {
        $msg .= $e->getMessage()."
";
    } http://www.bkjia.com/PHPjc/633096.html

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http://www.bkjia.com/PHPjc/633096.htmlTechArticle一个php 登录时用户名与密码验证实例程序，有需要学习的朋友可参考参考。 、登录时对用户输入的用户名、密码进行验证 代码如下 复制代...