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php 注册时输入信息验证器的实现详解

程序员文章站 2023-01-02 18:10:50
1、对输入信息进行验证的类(主要用于验证用户名,密码,重复密码,邮箱,可添加其它功能)复制代码 代码如下:
1、对输入信息进行验证的类(主要用于验证用户名,密码,重复密码,邮箱,可添加其它功能)
复制代码 代码如下:

<?php
/**
 * validator for register.
 */
final class registervalidator {
    private function __construct() {

    }
    /**
     * validate the given username, password, repeat_password and email.
     * @param $username, $password, $repeat_password and $email to be validated
     * @return array array of {@link error} s
     */
    public static function validate($username, $password, $repeat_password, $email) {
        $errors = array();
        $username = trim($username);
        $password = trim($password);
        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)) {
            $errors[] = new error('username', '用户名只能是字母、数字以及下划线( _ )的组合。');
        } elseif (!$password) {
            $errors[] = new error('password', '密码不能为空。');
        } elseif (strlen($password)<6) {
            $errors[] = new error('password', '密码长度不能小于6个字符。');
        } elseif (strlen($password)>30) {
            $errors[] = new error('password', '密码长度不能超过30个字符。');
        } elseif (!preg_match('/^[a-za-z0-9!@#\\$%\\^&\\*_]+$/', $password)) {
            $errors[] = new error('password', '密码只能是数字、字母或!@#$%^&*_等字符的组合。');
        } elseif ($password != trim($repeat_password)) {
            $errors[] = new error('password', '两次输入密码不一致。');
        } elseif (!utils::isvalidemail($email)) {
            $errors[] = new error('email', '邮箱格式有误。');
        } else {
            // check whether user exists or not
            $dao = new userdao();
            $user = $dao->findbyname(trim($username));
            if ($user) {
                $errors[] = new error('username', '该用户名已经被使用。');
            }

            $user = null;
            // check whether email being used or not
            $user = $dao->findbyemail(trim($email));
            if ($user) {
                $errors[] = new error('email', '该邮箱已被注册。');
            }
        }
        return $errors;
    }
}
?>

2、在注册页面进行调用
复制代码 代码如下:

$username = null;
$password = null;
$repeat_password = null;
$email = null;
$msg = "";
if (isset($_post['username']) && isset($_post['password'])
        && isset($_post['repeat_password']) && isset($_post['email'])) {
    $username = addslashes(trim(stripslashes($_post ['username'])));
    $password = addslashes(trim(stripslashes($_post ['password'])));
    $repeat_password = addslashes(trim(stripslashes($_post ['repeat_password'])));
    $email = addslashes(trim(stripslashes($_post ['email'])));
    // validate
    $errors = registervalidator::validate($username, $password, $repeat_password, $email);
    // validate
    if (empty($errors)) {
        // save
        $dao = new userdao();
        $user = new user();
        $user->setemail($email);
        $last_login_ip = utils::getipaddress();
        $user->setlastloginip($last_login_ip);
        $user->setusername($username);
        $salt = substr(sha1(mt_rand()), 0, 22);
        $hash_password = sha1($salt . $password);
        $user->setpassword($hash_password);
        $user->setsalt($salt);
        $user = $dao->save($user);
        if ($user) {
            userlogin::setuserinfo($user);
            flash::addflash('注册成功!');
        }
        else {
            flash::addflash('对不起,由于服务器内部错误,导致注册失败。请稍后再试。');
        }
        utils::redirect('welcome');
    }

    foreach ($errors as $e) {
        $msg .= $e->getmessage()."<br>";
    }

3.代码中error类用于记录验证时的错误信息
复制代码 代码如下:

<?php
/**
 * validation error.
 */
final class error {
    private $source;
    private $message;
    /**
     * create new error.
     * @param mixed $source source of the error
     * @param string $message error message
     */
    function __construct($source, $message) {
        $this->source = $source;
        $this->message = $message;
    }
    /**
     * get source of the error.
     * @return mixed source of the error
     */
    public function getsource() {
        return $this->source;
    }
    /**
     * get error message.
     * @return string error message
     */
    public function getmessage() {
        return $this->message;
    }
}
?>