![我无法获得登录表单以正确连接与mySQL数据库的交互[关闭]](http://www.mshxw.com/aiimages/31/402701.png "我无法获得登录表单以正确连接与mySQL数据库的交互[关闭]")
此答案适用于hashing，password_hash（）和password_verify（）。对于mysqli和pdo。底部的链接具有其他链接以及有关盐等的某些语言。
至关重要的是不要将用户提供的数据直接用于选择和插入。而是绑定参数并调用准备好的语句，以避免sql注入攻击。永远不要将密码以明文形式保存在数据库中。而是应通过单向哈希发送它们。
另请注意。这显示了注册哈希和登录验证。它 不是完整的 功能，我想花10美元在precanyon上用…
…这样它表明电子邮件地址（登录名）的重新注册已经存在，确实更新了，请注意。在这种情况下，由于数据库中设置了唯一键，因此插入将完全失败。我将其留给读者（读者）进行查找，然后说“电子邮件已注册”。
架构图
CREATE TABLE `user_accounts2` ( `id` int(11) NOT NULL AUTO_INCREMENT, `email` varchar(100) NOT NULL, `password` varchar(255) NOT NULL, PRIMARY KEY (`id`), unique key(email) -- that better be the case) ENGINE=InnoDB;
通过register.php运行并保存用户后，数据可能如下所示：
select * from user_accounts2;+----+-----------+--------------------------------------------------------------+| id | email | password |+----+-----------+--------------------------------------------------------------+| 1 | d@d.com | $2y$10$U6.WR.tiOIYNGDWddfT7kevJU8uiz8KAkdxXpda9e1xuplhC/eTJS |+----+-----------+--------------------------------------------------------------+
mysqli部分第一
register.php
<?php mysqli_report(MYSQLI_REPORT_ALL); error_reporting(E_ALL); // report all PHP errors ini_set("display_errors", 1); // display them session_start(); if(isset($_SESSION['userid'])!="") { // you are already logged in as session has been set header("Location: safe.php"); // note that this re-direct will at the top of that page // ... and there to verify the session state so no tricks can be performed // no tricks and gimmicks } if(isset($_POST['register'])) { $email = $_POST['email']; $ctPassword = $_POST['password']; // cleartext password from user $hp=password_hash($ctPassword,PASSWORD_DEFAULT); // hashed password using cleartext one // pretend the following is locked in a vault and loaded but hard pred here $host="yourhostname"; $dbname="dbname"; $user="dbuser"; $pwd="password"; $port=3306; // comes along for the ride so I don't need to look up param order below // end pretend try { $mysqli= new mysqli($host, $user, $pwd, $dbname,$port); if ($mysqli->connect_error) { die('Connect Error (' . $mysqli->connect_errno . ') ' . $mysqli->connect_error); } //echo "I am connected and feel happy.<br/>"; $query = "INSERT INTO user_accounts2(email,password) VALUES (?,?)"; $stmt = $mysqli->prepare($query); // note the 2 s's below, s is for string $stmt->bind_param("ss", $email,$hp); // never ever use non-sanitized user supplied data. Bind it $stmt->execute(); // password is saved as hashed, will be verified on login page with password_verify() $iLastInsertId=$mysqli->insert_id; // do something special with this (or not) // redirect to some login page (for now you just sit here) $stmt->close(); $mysqli->close(); } catch (mysqli_sql_exception $e) { throw $e; } }?><html><head><title>Register new user</title></head><body><div id="reg-form"><form method="post"> <table> <tr> <td><input type="email" name="email" placeholder="Email" required /></td> </tr> <tr> <td><input type="password" name="password" placeholder="Password" required /></td> </tr> <tr> <td><button type="submit" name="register">Register</button></td> </tr> <tr> <td><a href="index.php">Normal Login In Here</a></td> </tr> </table></form></div></body></html>login.php
<?php mysqli_report(MYSQLI_REPORT_ALL); error_reporting(E_ALL); // report all PHP errors ini_set("display_errors", 1); // display them session_start(); if(isset($_SESSION['userid'])!="") { // you are already logged in as session has been set header("Location: safe.php"); // note that this re-direct will at the top of that page // ... and there to verify the session state so no tricks can be performed // no tricks and gimmicks } if(isset($_POST['login'])) { $email = $_POST['email']; $ctPassword = $_POST['password']; // cleartext password from user // pretend the following is locked in a vault and loaded but hard pred here $host="yourhostname"; $dbname="dbname"; $user="dbuser"; $pwd="password"; $port=3306; // comes along for the ride so I don't need to look up param order below // end pretend try { $mysqli= new mysqli($host, $user, $pwd, $dbname,$port); if ($mysqli->connect_error) { die('Connect Error (' . $mysqli->connect_errno . ') ' . $mysqli->connect_error); } //echo "I am connected and feel happy.<br/>"; $query = "select id,email,password from user_accounts2 where email=?"; $stmt = $mysqli->prepare($query); // note the "s" below, s is for string $stmt->bind_param("s", $email); // never ever use non-sanitized user supplied data. Bind it $stmt->execute(); $result = $stmt->get_result(); if ($row = $result->fetch_array(MYSQLI_ASSOC)) { $dbHashedPassword=$row['password']; if (password_verify($ctPassword,$dbHashedPassword)) { echo "right, userid="; $_SESSION['userid']=$row['id']; echo $_SESSION['userid']; // redirect to safe.php (note safeguards verbiage at top of this file about it) } else { echo "wrong"; // could be overkill here, but in logout.php // clear the $_SESSION['userid'] } } else { echo 'no such record'; } // remember, there is no iterating through rows, since there is 1 or 0 (email has a unique key) // also, hashes are one-way functions in the db. once you hash and do the insert // there is pretty much no coming back to cleartext from the db with it. you just VERIFY it $stmt->close(); $mysqli->close(); } catch (mysqli_sql_exception $e) { throw $e; } }?><html><head><title>Login</title></head><body><div id="reg-form"><form method="post"> <table> <tr> <td><input type="email" name="email" placeholder="Email" required /></td> </tr> <tr> <td><input type="password" name="password" placeholder="Password" required /></td> </tr> <tr> <td><button type="submit" name="login">Login</button></td> </tr> </table></form></div></body></html>下面的pdo部分
当我有时间时，大概是明天，但是现在我将您引向我的答案。
