php+MySQL实现登录时验证登录名和密码是否正确，mysql登录名-php手册-php.cn

php+MySQL实现登录时验证登录名和密码是否正确，mysql登录名

WBOY

Release： 2016-06-13 08:40:20

Original

1577 people have browsed it

php+MySQL实现登录时验证登录名和密码是否正确，mysql登录名

直入主题，先看php校验登录名和密码是否正确的代码：

<&#63;php
 $servername = "服务器名";
 $username = "账户名";
 $password = "密码";
 $dbname = "数据库名";
&#63;>
<&#63;php
 // Session需要先启动。
 session_start();
 //判断uname和pwd是否赋值
 if(isset($_POST['uname']) && isset($_POST['pwd'])){
 $name = $_POST['uname'];
 $pwd = $_POST['pwd'];
 //连接数据库
 $conn = new mysqli($servername, $username, $password, $dbname);
 if ($conn->connect_error) {
  die("Connection failed: " . $conn->connect_error);
 }
 //验证内容是否与数据库的记录吻合。
 $sql = "SELECT * FROM test_students_all WHERE (student_name='$name') AND (password='$pwd')";
 //执行上面的sql语句并将结果集赋给result。
 $result = $conn->query($sql);
 //判断结果集的记录数是否大于0
 if ($result->num_rows > 0) {
  $_SESSION['user_account'] = $name;
  // 输出每行数据
  while($row = $result->fetch_assoc()) {
  echo '<p>' . $row['student_nbr'] . '<br/>' . $row['student_name'] . '(' . $row['sex'] . ')' . '<br/>' . $row['class'] . '<br/>' . $row['major'].'</p>';
  // <p><img  src="student_images/CLASS/STUDENT_NBR.jpg" / alt="php+MySQL实现登录时验证登录名和密码是否正确，mysql登录名" ></p>
  echo '<p><img  src="student_images/' . $row['class'] . '/' . $row['student_nbr'] . '.jpg" / alt="php+MySQL实现登录时验证登录名和密码是否正确，mysql登录名" ></p>';
  }
 } else {
  echo "没有您要的信息";
 }
 $conn->close(); 
 }
&#63;>
<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>登录校验</title>
</head>
<body>
 <p>
 <&#63;php
  // isset(xx) 测试xx是否设置了
  if(isset($_SESSION['user_account'])){
  echo '你好，' . $_SESSION['user_account'];
  }
  else{
  echo '游客';
  }
  //$conn->close();
 &#63;>
 </p>
 <form method="POST">
 <input type="text" name="uname" placeholder="用户名" />
 <br />
 <input type="password" name="pwd" placeholder="密码" />
 <br />
 <input type="submit">
 </form>
</body>
</html>

Copy after login

效果图：

以上就是本文的全部内容，希望对大家学习php程序设计有所帮助。